A 591209 ARTES LIBRARY 037 SCIENTIA VERITAS OF THE UNIVERSITY OF MICHIGAN | PLURIBUS UNIM TUEBOR QUAERIS PENINSULAM AMOENAM CIRCUMSPICC RUSSELL LIBRARY THE GIFT OF Dr. C. Rominger QE CE LIBRARY 129 A 35 1860 Presented to B. Graves day the Legialistine of Mines Oxford, Miss. 72.17.1869. FIG. 1. Dwyers Ferry Pascagoula t Grand Gulf Group Vicksburg Jackson Prairies Quilmun Siliceous Claiborne Group Group Group Calcareous Claiborne Group Marion t Northern Lignilic Group Flatwoods Prairie Oxford Plate I. Walnut Carrollville Peak Ripley Group Rotten Limestone Group Tombigbee Sand Group Eutaw Group Carboniferous FIG. 1.-General Profile of the Formations of Mississippi, from Pascagoula, to Dwyer's Ferry, Quitman, Marion and Oxford, thence to the Alabama Line, near Walnut Peak P. O., Tishamingo Co. 1 { (NOTE.-The great apparent thickness of the Northern Lignitic Group, as exhibited in this section, is owing to the change of direction of the line of projection, which in part runs parallel to the strike of the strata of this group. The dotted space represents the Orange Sand.) 1 Diagram showing lines of General Profile, Fig. 1. CHICKASAW COUNTY. FIG. 2. 1 MONROE COUNTY. Pontotoc Ridge Dexter Kilgore Houlka Chuck atonche Aberdeen Tombigbc.e Athens Buttahatchie Benela Flatwoods Sparta Carradine Prairies S Lignitio 12 Rotten Limestone - 17 • # 11 to " Tombigbee Sand Eutaw Group FIG. 2.-Profile of the surface and stratification of the Cretaceous Formation, from Benela to Sparta, Aberdeen, Athens, Buttahatchie, and State Line. REPORT ON THE GEOLOGY AND AGRICULTURE OF THE STATE OF MISSISSIPPI: BY EUG. W. HILGARD, PH. D., STATE GEOLOGIST. PRINTED BY ORDER OF THE LEGISLATURE. E. BARKSDALE, STATE PRINTER. JACKSON MISSISSIPPI, 1860. PREFACE. THE Report on the Geology and Agriculture of Mississippi herewith presented to the public, and more especially, to the people of Mississippi, is intended to embrace the observations and results heretofore obtained in connection with the Geological and Agri- cultural Survey of the State, so far as they are complete in them- selves, or calculated to impart useful information, either practical or scientific, as to the natural character and resources of the State. There exists a great diversity of opinion, both among professional men and the public generally, as to what ought to be the character and extent of the investigations connected with State Surveys of this kind; nor can this be surprising in view of the fact, that the execution of such works under the auspices of State governments, has only been inaugurated at quite a recent date, since the rapid progress of industrial pursuits by the aid of science, has rendered the claim of those depending more immediately upon the natural resources of the land, to similar assistance, too clear and pressing to be longer disregarded. At first, these Surveys contemplated mainly the development of the mineral resources of the countries to be examined; but the obvious importance of a simultaneous observation of the prospects offered to other pursuits, has gradually so expanded the sphere of investigation, that its limits, as well as the principal and primary subjects of investigation are now generally determined chiefly by the pecuniary means provided for the purpose, in connection with the natural conditions and first necessities of the regions to be explored. 161675 iv PREFACE. It follows as a necessary consequence, that the objects of these Surveys, as well as the manner of their execution, will differ, more or less, in each State; and that the method of investigation pursued in one may be altogther unsuited to the conditions obtain- ing in another. The Survey of Mississippi, according to the act creating it, was to be of the most comprehensive character-nothing less, in fact, than a complete Natural History Survey, embracing scientific as well as practical detail-similarly with that of New York. The limited means provided by law, however, have rendered it unadvis- able to attempt to prosecute simultaneously such a multitude of subjects, since the development of the most practically important results would thus be unduly delayed; and for some years past, the more immediate objects of a Geological and Agricultural Survey have been chiefly kept in view, the other departments of natural science receiving such consideration only as their intimate connection with the chief objects necessarily required. In the present Report, therefore, the geological and agricultural features of the State of Mississippi, as far as observed, and the investiga- tions made in relation to them, are chiefly considered. As to the method pursued in the investigations themselves, and the direction of the latter, the Report will speak for itself. The main object in a practical point of view being, in Mississippi, the promotion of the interests of Agriculture and of kindred pursuits, (in the absence of metallic minerals to any useful extent) and the agricultural features being so closely dependent upon the geologi- cal, as to render the subdivisions based upon the latter almost equivalent to those which represent the former; since, moreover, the materials of the geological formations are important, not only as imparting their character to the soils, but also as furnishing natural manures of the highest value; the study of the geological phenomena is obviously the first step towards a full understanding of the agricultural resources, both present and future; which cannot be intelligently discussed without continual reference to the former. This study being absolutely essential, we must bring to bear on it all the means that science affords, even though these should, at first sight, seem to have no bearing on the practical questions to be decided-an objection not unfrequently urged against the detailed study of fossil shells, for instance. Yet this PREFACE. 架 ​apparently unprofitable knowledge of the shells found in the several strata, is hardly less essential in the study of the geology of Mississippi, than the knowledge of the several letters of the alphabet is to him who would learn to read. And thus it is with many other subjects of scientific research mentioned in the present volume, which to those not accustomed to studies of this kind might seem of no interest whatsoever. As regards the study of the agricultural features proper, both the methods I have pursued, and the objects I have kept in view, are more specially, and more fittingly, explained in the General Part of the Agricultural Report, than could be done in this place ÷ and will be found amply exemplified in the Special Part, page 254, ff. If the method to be pursued in investigations of this kind, is subject to differences of opinion (sufficiently great to have caused the American Association for the Advancement of Science, at one- of its late sessions, to appoint a committee composed of some of the first men of science to examine the question), such is no less the case with reference to the manner of presenting the results to the public. It would seem that this point also must be considered as being, in a great measure, subject to variation according to the necessities of each case; and such being my conviction, it has been my aim throughout to answer, as far as I could, the questions bear- ing upon the subjects in hand, which experience had taught me were afloat, and being agitated, among the people, whether of a single neighborhood or district, or of the whole State; in such connection, and, as much as possible, in such language as I knew would make it understood at the points for which it was intended, even though the expressions employed might not in all cases be deducible from any authentic philological source. I am aware that in so doing, I have laid myself open to some criticism in a literary point of view; but I hope that the practical consideration just referred to may serve, in some measure, as an extenuation of the fault. It is more especially with reference to the introduction of the somewhat lengthy chapter treating of the general principles of Rational Agriculture, that I feel it necessary to enter the plea of special fitness, since on general grounds, it might not be considered as being in its place in a special Report. It was originally sug- gested by my personal experience, among the agricultural popula- tion of the State, of the desire for information of this character; vi PREFACE. and the probability that without it, the results of the Agricultural Survey could not readily be made available to a very large part of those for whose special benefit the work is intended. Yet I might not have thought myself justified in making this feature so prominent, even to the exclusion of a certain amount of special information, but that it appeared to meet the particular approval of the gentlemen constituting the legislative committee, to whose examination the manuscript was submitted-thus confirming the impression dirived from my own observation, regarding the pro- priety of introducing it, as explanatory of the nature and object of such investigations, and of the results elicited. With this special object in view, I have attempted to present, to the agricul- tural reader, as briefly and concisely as possible, and with the least use of technical terms compatible with that conciseness, the well- established principles of Rational Agriculture, with special refer- ence to such matters as have a particular bearing upon the conditions existing in this State. The treatise, therefore does not in any manner pretend to completeness, but simply touches in an explanatory manner, such subjects as appeared to me of immediate importance in connection with the results of the Survey; and I have endeavored by copious references throughout the special part, to establish that connection, and to enable the reader unacquainted with the subject; to see, and act intelligently with reference to the reasons why a certain course is recommended in certain cases. It is with reference to the latter point particularly, that I have deviated from the course usually pursued in Reports communicating analyses of soils; it being mostly left to the agriculturist to interpret, as best he may, the columns of names and figures which he recieves from the hands of the chemist. That under such cir- cumstances, little benefit should result from these analyses, is not wonderful. The chemist, not knowing the circumstances under which the soil he has analyzed, occurs in nature, cannot, if he would, advise intelligently as to the import of his results; yet, to draw the conclusions contained in the abstract result communicated by him to the agriculturist, almost always transcends the knowledge of the latter; for it presupposes in most cases, an acquaintance with chemistry and the kindred sciences not to be expected, unless of professional men. The agricultural chemist, therefore, ought not only to make the analyses, but also to interpret them to the PREFACE. vii agriculturist; but he cannot, in general, do so intelligently from the results obtained in his laboratory alone, from a few specimens desultorily collected by others, without reference to any rule, or system of investigation; which can be consistently carried out only upon the scale of a public work, by State aid. While this, however, may justly be claimed at the hands of the scientific investigator, it is asking nothing short of an impossibility, when it is expected of him that he should communicate the scien- tific detail of his researches, in language intelligible to those not previously acquainted with the fundamentals of the science. It might as well be asked that he should teach a person to read, without giving him the trouble of learning the letters of the alphabet. It is very commonly and cheaply charged upon professional men generally, and upon those cultivating the exact sciences in partic- ular, that they have a perverse disposition to wrap up everything known in an unintelligible, technical jargon, or "big words", as they are currently termed. It is expected of them that they should develop new ideas (such as always result from the special study of any subject), but that they should use no new terms in expressing or communicating them; which is simply impossible. No one can expect to be taught, without learning; let him catch the idea, and it will matter little to him whether the word expressing the same be Greek, Latin, or Chinese; English terms, already possessing definite meaning, cannot be used to express new ideas. If he cannot take the time, or trouble, to learn the idea, he ought not to complain if he cannot understand the term. ༣ In a practical point of view, it being undeniable that the fre- quent recurrence of technical terms not familiar to the general reader, will often deter the latter from attempting to read even that which he can understand, I have thought it best to separate, as much as possible, the purely scientific part from the purely practical, so as to enable each one to select at once what is suited to his taste and purpose. I have for this reason, separated the geological part from that descriptive of the agricultural features, connecting the two, however, by copious references, and even repeating in brief, at times, in the latter part, important points in the geology of the country, already given in the former part, and more fully discussed there. In the geological part itself, I have viii PREFACE. given under separate heads ("Useful Materials") the chief practi- cal results embraced in the previous description of geological detail, which it would be impossible to render fully intelligible to readers not conversant with the science, without writing, at the same time, a Compend of Geology. The latter course has been to some extent pursued in many State Reports, and among others, in the two Reports published previous to the present one, in this State. I have so much the more felt justified in omitting this feature, and substituting for it a Compend of Agriculture, before noticed. But it may be thought by some that under the circumstances, the geological, scientific detail might, for practical purposes, as well have been omitted altogether. But it is inadmissible, at the present day, to appear before the public with mere assertions, with- out presenting, as vouchers for the accuracy of the observations, the record of the latter; and the fact that that record cannot be made intelligible to all at the first glance, can form no legitimate objection to the propriety of giving those who can understand it the opportunity of judging and controlling, the correctness of the conclusions. The very separation of the practical from the scien- tific detail, has necessarily imparted to the latter an aspect even more abstruse than usual; but the unprofessional reader may skip what seems unintelligible to him, with the understanding that he loses nothing that could be explained, unless he were to go to the trouble of making himself acquainted with the rudiments at least of the science, which it is not the province of a State Report to teach. A great deal, however, of what might not be intelligible to the general reader, by itself, will become so to those desiring further information on the subject in hand, by looking up the paragraphs referred to in the text-to facilitate which, the paragraphs occurring on every page are given at the top, on the inner corner. The whole being written with a view to these references, to avoid incessant repetition, it will be quite essential to the casual reader to make use of them. The discusssion of the agricultural features of a region involves, necessarily, two distinct classes of data, viz: Ist. The general description of the surface configuration, vegetation, soil, etc. 2nd, The discussion of the peculiarities of the several soils, if the observations made are such as to render such discussion useful. PEFACE. ik. While the former class of observations has been made, and is recorded here, with reference to the greater portion of the State, the latter is as yet very incomplete, in consequence of the chemical work of the Survey having unavoidably remained far behind the field work. Copious specimens of soils, marls, etc., from the regions examined are, however, in the collection of the Survey, and will be subjected to analysis, or such other examination as they may require, so soon as the limited means of the Survey- consisting, thus far, of my single-handed labor, with the occasional aid of kind friends-will permit; and the same is intended to be done with reference to the districts not yet sufficiently examined, as mentioned in the Special Report. The publication of prelimi- nary Reports necessarily containing a great deal of crude and undigested matter, is not a pleasant necessity to the scientific investigator; but I shall consider the objects of the present Report to be amply attained, if the observations, results and suggestions it contains, shall succeed in awakening our agricultural population more generally to the importance and necessity of agricultural improvement, and of a rational system of Agriculture. It rests with them, in great degree, to render the Agricultural Survey that which it should be. It is upon them that the scientific inves tigator is dependent, in most cases, for knowledge of the faults and virtues of a soil, the cause and remedies of which he is to ascertain; it is they who must test in practice the correctness of his conclusions; and it is only by co-operation of this kind between the practical agriculturist and the scientific investigator, that the benefits of the aid of science to Agriculture, are capable of reali- zation. Agricultural science is young; it cannot as yet answer at once all questions which may arise in regard to the mutual relations of soils and crops; but its fundamentals are well established, and it is upon investigations like these that its progress must be based. It is obvious, moreover, that the knowledge thus obtained of the peculiarities of the State, is a most essential step towards the establishment of Agricultural Schools of a character truly prac- tical, in which the young men of the State shall be taught, not only general principles, and what ought to be their mode of pro- cedure in certain suppositious cases: but also what are, in fuct and practice, the cases they will have to deal with in their own State, illustrated by actual specimens, having received a thorough exam- ination. X PREFACE. In mentioning the vegetation of the several regions, I have throughout made use of the popular names, as far as such exist ; when, however, characteristic plants requiring mention possessed no English name, I have given the systematical botanical term, which conveys the meaning to some persons at least. I must observe, however, that in reference to the popular names of the Oaks, there exists a great confusion in our State; those generally adopted in the United States, and which have already passed into systematic botany and text-books, having partially, in Mississippi, been trans- ferred to different species. Thus the Quercus falcata, everywhere else called Spanish Oak, is generally designated as "Red Oak" in Mississippi; the true Red Oak (Q. rubra) of the Middle States, is either not distinguished here from the Black Oak (Q. tinctoria), or is by many thought to be a "kind" (variety) of the Q. falcata (the "Red" Oak of the Mississippians, or Spanish Oak proper.) On the other hand, the name of "Spanish Oak" is popularly applied, in Mississippi, to the Q. cocinea, the Scarlet Oak of other States. To use the other nomenclature by itself, would involve, either throwing the student of botany into inextricable confusion as to the trees of the State, or else a misunderstanding on the part of the agricultural population, which would be the more serious, as these several Oaks indicate very essential differences of soil. To avoid these inconveniences, I have throughout, in the text, used the names as adopted in botanical text books, but have introduced after them, in parenthesis, quotations, and italic type, the corres- ponding names as usually used in Mississippi. Thus, Spanish ("Red") Oak implies the Quercus falcata, commonly termed "Red Oak in Mississippi. The "Poplar" (Liriodendron tulipifera- Tulip-tree of the text-books), also, I have placed in quotations, because the name properly belongs to the Lombardy Poplar and Cottonwood (Populus) tribe of trees. 77 To those familiar with the sciences, it is proper to state, that the methods I have pursued in the quantitative analyses of soils, etc., are essentially those described by Dr. R. Peter, in the third volume of the Kentucky Geological Report, which yield results very uni- formly satisfactorywith a great variety of materials. The time during which the soils were digested with acid of uniform strength, was in most cases, as uniformly as possible, five days. Want of time and proper arrangements have hitherto compelled me to PREFACE. xi omit the separate determination of sand, and the extraction of the soil with carbonic acid water (both intended to be performed hereafter). I have substituted for the determination of moisture contained in the air-dried soil (varying greatly within brief periods), that of the moisture absorbed by the same at a fixed temperature if possible, in an atmospere at the point of saturation, with aque- ous vapor; which renders the determinations directly comparable, and seems to offer a very important element in the determination of the treatment of soils. Not having had a space of a perfectly uniform temperature at my command, the temperatures at which the saturation took place, have varied somewhat, as will be seen by reference to the analyses; but it is my intention to determine, at the earliest possible moment, the law of variation in this respect, so as to render the results strictly comparable. I hope that the imperfections of the work in a scientific as well as in many other points of view, may meet with lenient judgment at the hands of those at least, who have experienced the difficulties besetting an observer who has to rely almost entirely upon his single-handed labor, in the numerous departments of science involved in a work of this kind. It may be noticed by those possessing the Report of my imme- diate predecessor (L. Harper), that many facts and localities mentioned there, are referred to and described in the present one also. As stated at first, it has been my aim to communicate as completely as possible, all reliable observations and results here- tofore obtained in connection with the Survey; and wherever I have availed myself of the observations, either of my predecessors, or of other scientific observers, I have given due credit. With reference to Harper's Report, therefore, I have simply to say, that nine-tenths of all the data given there in relation to the north- western portion of the State, are extracts, sometimes literal, from my field notes, made in the capacity of Assistant in 1856; the observations then made being here presented in the light in which they appear to me, and with the conclusions to which, in my judgment, they legitimately lead. Owing to the want of his field notes, as well as those of his predecessors, I have been compelled to rely chiefly upon my own recollection with reference to the observations jointly made in the southern portion of the State, in 1855, so far as I have not since re-examined the region personally. xii PREFACE. I have to regret that the inadequacy of the appropriation made for printing the present Report, has compelled me to curtail its contents in several important particulars, and among others has necessitated the omission of the tables of elevations, as ascertained by the railroad surveys; which are, therefore, reserved for a future Report; and has likewise rendered necessary a partial reduction of the size of the type. Notwithstanding these curtailments (as far as compatible with the objects of the Report), the cost of pub- lication has, under the circumstances, seriously exceeded the amount provided. Of the accurate observations contained in Prof. Wailes' First Report (which has become somewhat scarce), I have availed myself, so far as they come within the purpose of the present Report; giving due credit therefor. To Dr. William Spillman, of Columbus, Mississippi, I am indebted for the catalogue of fossils given in the Appendix, as well as for other favors. To Leo Lesquereux, Esq., of Columbus, Ohio, I am indebted for determinations of fossil plants from the Lignitic strata of North Mississippi. My most especial acknowledgments are due to Prof. W. D. Moore, of the University of Mississippi, for voluntary assistance not merely occasional, but of the most comprehensive kind and in part, of the most toilsome character; he having for months together devoted all his leisure time, even at nights when necessary, and oftentimes at great inconvenience to himself, to the furtherance especially of those portions of the work which otherwise, in the multifarious duties devolving upon me, could hardly have been touched as yet. I owe to his patient labor the systematic arrange- ment and labeling of the Survey collections at Oxford. Without his assistance in the determination and comparison of fossils, the geological features of the State would even now, in a great measure, have been but imperfectly determined, unless many other practically important investigations had been omitted instead; and the compilation of the catalogues of fossils is almost entirely the fruit of his labor. Of fieldwork I owe to him the re-examination and more accurate tracing out of the deposits of hydraulic lime- stone in Tishomingo, the result of which is given in the Appendix. And finally, he has rendered me most essential aid in the arrange- PEFACE. xiii ment and revision of the manuscript; and in seeing through the press its latter portion, at considerable inconvenience to himself. I cannot close this, already somewhat lengthy preface, without expressing my obligations to the numerous gentlemen throughout the State, by whose kindness and intelligent assistance my labors in the field have been essentially lightened, and the work of the Survey materially promoted. EUG. W. HILGARD. OXFORD, August, 1860. TABLE OF CONTENTS. PREFACE.... P..3 ORANGE SAND: characterizes the surface of the State; wanting in four divisions only, p. 5; thickness of, ancient hills in, 6; stratification irregular, character of materials, 7; rocky knolls and ferruginous sandstone ledges in, 8; singular tubes in, 9; ferruginous sand rock not iron ore; singular rock in process of formation at present, 10; white sands of, their localities, 11; pebble beds of; two distinct regions of their occurrence; their extent and direction, 11, 12; material of the pebbles, their size and form, 12, 13; usual mode of occurrence, 14 singular rock of, clay deposits of, 14, 15; general character of these, metamorphosis of materials in the Orange Sand, 15; diagram illustrat- ing it, 16; fossils of the Orage Sand, Devonian, Silurian, Carboniferous, 17, 18; contains only the fossils of other formations, 17; singular hornstone breccia in, 18; remarkable decaying pebbles of, 19; Creta- ceous fossils in, 19; Tertiary fossils in, 20; silicified wood in, 20, 21; diagram illustrating contact of Orange Sand strata with those of other formations, 23; effect of contact of Orange Sand with Lignitic Clays, silicified wood in, abundance of Soluble Silica, 24; singular silicious mass in, 25; pebble beds coincident in their position with the course of the great rivers at present existing, 26; relations of the Orange Sand to the Northern Drift, 27, 28; stratification of Sands on the Sea-Coast, diagram illustrating, Tuomey quoted, 29; useful materials of the Orange Sand-sands, gravel, gems, 30; building stones, sandstone, 31; locali- ties of, 32, 33; pipe-clay; localities of, 34, 35, 36; uses of this clay, 37, 38; cream colored clays, 38; potter's clay, 39, 40, 41; important bed of red clay valuable for paint, 41, 42; mode of its formation, 42; yel- low and red ochre, 43; iron ore, materials for glass, 43, 44; waters of the Orange Sand-quality, quantity, availability, 44, 45, 46. CARBONIFEROUS: Territory occupied by, small; outcrops few; order of Strata not easily determined, dip, outcrops correspond to Keokuk and Warsaw Limestones of Iowa Report, 47; materials of, p. 48; localities of, Red Sulphur Springs, hydraulic limestone, 48; singular decaying hornstone; Tuomey quoted; calcareous shale and fossils; whitish chert and fossils; limestone and fossils of Cypress Pond, 50, 51; Section of Carboniferous at McDouglas' Mills: localities continued, 52; useful materials of-hydraulic limestone, 63; analysis and localities of, 54, 55; mode of manufacture, value of, 55, 56; limestone for quicklime, analysis of, 56; building stones, grindstones and flagstones, 57; mate- rials for glass, 58; mineral waters, springs, etc., 60. xvi TABLE OF CONTENTS. CRETACEOUS: extent of territory occupied by, dip of strata Dr. Spillman's, estimate, 60; three stages of-properly given: Eutaw Group, 1; Tom- bigbee Sand Group, 2; Rotten Limestone Group, 3; Ripley Group, 4; general characteristics and fossils of each, 61, 62. EUTAW GROUP: specially considered, means of distinguishing it from over- lying Orange Sand, its clays characteristically developed in Tishomingo county, diagram illustrating its stratification, 63; localities of, fossil trees in, 64; fossil resin in, 65;` additional localities, 66; Section showing relation of Rotten Limestone and Eutaw, lignite and pebbles in, Tuomey quoted 67; Section of Cretaceous in Lowndes County, great number of shark's teeth, 68. TOMBIGBEE SAND GROUP specially considered, 68; micaceous sand preva- lent material, localities of, 69; Section M. & C. R. R., additional local- ities and fossils, 70; Section on M. & C. R. R., additional localities and fossils, 71; Section on Big Brown's Creek, Tishomingo county, and description of the strata, 72; Section on the Tombigbee, in Monroe Co., and description of strata, 73; Section on the same, in Lowndes Co.; Dr. Spillman's collection of fossils; E. Q. Thornton, Esq., quoted ; Prof. Tuomey quoted, 74; fossils of this group compared with similar strata in Alabam, 75. ROTTEN LIMESTONE GROUP; general character, material of, dip of, paleontological distinction from the Tombigbee Sand Group, 76; local- ities and fossils, 77; additional localities, depth of wells, 78, 79; locali- ties continued, 80; absence of springs and sipe wells, fossils of this group, 81, 82. RIPLEY GROUP: surface of the territory hilly; two materials compose, essentially, its strata-crystalline limestone and bluish micaceous marls, p. 83; springs of, peculiar vegetation of, history of the discovery and exploration of, study and determination of the fossils, Hilgard, Conrad, Harper, Spillman, 84; localities of, 85; Section of strata in Wilhite's Well, and at Kindrick's Mill, Tippah, 86; Section at Rip- ley, 87; Section at Owl Creek Bluff, 88; Section of an isolated Cre- taceous hill, Tippah Co., 89; localities, limestone ledges, caves, 90; localities continued, 91; fossils of the group, Moore, Prof. W. D. 92 ; catalogue of, 92, 93, 94; catalogue of species common to Upper and Lower Cretaceous, by Conrad and Gabb; useful materials of the Cre- taceous, 95: Marls wanting in Eutaw Group; micaceous sands of Tombigbee Group, good fertilizers, 95; analysis of sand from Waverly Bluff, marls of the Rotten Limestone Group; analysis of Houston marl; iron pyrites in this marl makes it necessary to be cautious in its use; the rotten limestone itself a marl; a calcareous stimulant manure, Marls of the Ripley Group, 97; their distinguishing feature green sand; these marls generally underlie the limestone in the region of their occurrence; analysis of Wilhite's marl; localities of this marl, 98; analysis of marl from O. Davis' Well near Ripley; superior to Wil- hite's, 99; gray calcareous sand; gray calcareous clay; limestone not found in Eutaw, or Tombigbee Sand Group; hardest varieties usually purest; other modes of practically determining its purity; foreign material (generally clayey) in the Rotten Limestone impairs its value for making quicklime; localities of the purest, 100; analysis of Oka- lona Rotten Limestone, 101; limestone in the Ripley Group abundant ; foreign material generally sand; purer varieties usually along the western edge of the territory, 102; localities, analysis of Daggett's Limestone, 103; building stones; none in the Eutaw Group; Rotten Limestone too soft; limestones of Ripley Group better; waters of the Cretaceous Formation; abundant in the Eutaw and Tombigbee Sand Group, 104; little in the Rotten Limestone; abundant in the Ripley Group, 105, 106. 1 : TABLE OF CONTENTS. xvii THE TERTIARY FORMATIONS: occupy the greater portion of the State; dip; present three facies, namely: lignitiferous clays with remains of vegetables, silicious sandstones and claystones with marine fossils; and limestones and calcareous marls with marine fossils; estuary deposits of marine fossils sometimes found in the lignitic beds; lignitic beds usually separate the marine deposits, 107; general section of the Ter- tiary strata, 108; doubt as to position of "Lignitic of N. Mississippi": study of its fossil plants by L. Lesquereux; comparison of Venericar- dia planicosta from various geological horizons, by Prof. W. D. Moore, 109. I. NORTHERN LIGNITIC Specially considered; its territory generally hilly; deeply overlaid by Orange Sand; clay of, in the Flatwoods, p. 110; claystones stratified; lignite beds and material associated with them; Section of the Lignitic Strata, at Reeve's, N. Tippah; localities of N. Lignitic, 112; Section at a Bluff on Ocklimita Creek, W. Tippah; Section at Hurley's Schoolhouse, W. Tippah, 113; localities and Sec- tion of Lignitic Strata, in Tippah Co., 114; Section at Price's Old Mill, Yockeney; fossil leaves in, 115; diagram illustrating false stratifica- tion in Lignitic at Ragland's Bluff, 116; lignitic beds; localities con- tinued, 117; Section on Sowashee Creek, 118; Section at Spear's Cut, Lauderdale Co.; localities continued, 119; fetid clays-efflorescent; fossil leaves and lignite, 120; other localities; shells of Claiborne age?, 121; Shongalo marine formation intercalated between lignitic clays; Section at Kirkwood's Ferry, Attala Co., 122; other localities of the Shongalo deposit, 123. II. THE ČLAIBORNE GROUP. A. The Silicious Claiborne specially treated; strata impart no peculiar feature to the surface; localities and fossils, p. 123, 124; Section on the Chickasawhay, at Enterprize; fossils in this bluff; beds intervening between Silicious and Calcareous Claiborne, 125; B. The Calcareous Claiborne Strata; characterised by the pre- dominance of lime; fossils poorly preserved, except oysters, 126; Section on Falling Creek; beds between the Claiborne and Jackson Groups; Zeuglodon bones; fossil leaves and fruit, 127, 128. III. THE JACKSON GROUP; "black," and "bald" prairies common; Zeu- glodon, Eschara, remains of fish, Grypha (allied to convexa) common fossils; upper division matrix of Zeuglodon-lower, shells, figured and described by Conrad, in Waile's Report; highest strata at Canton, 128; localities, 129; Section in railroad cut near Calhoun Station; large skeleton of Zeuglodon found here, 130; Section at Moody's Branch and McNutt Hills, 131; fossils found at these places, and comparison of them with Vicksburg fossils, by W. D. Moore, 132, 133; other localities continued; Zeuglodon and other fossils, 134; Section near Red Bluff Station, Wayne Co., 135; beds between Jackson and Vicks- burg Group, 135-in this Section, determination of their fossils, list of them, comparison of this fauna with those of Vicksburg and Jackson Strata by Prof. W. D. Moore; lignitic beds at Vicksburg; depth according to Prof. W. D. Moore, 136; Section in Mr. John Parker's Well, Rankin Co., 137; Selenite, 139. IV. THE VICKSBURG GROUP; first studied by Conrad; only marine stage containing crystalline limestones; material of the gronp; relation to Grand Gulf Group, pp. 138, 139; Section from Yost's lime kiln to Butt's, Summit, Rankin Co., 140; localities of this group; Section of the Bluff at Vicksburg, 741; fossils of the Vicksburg, catalogue of the same, 142, 143, 144; Section above Byram Station, Rankin County; outcrops at Brandon, 145; other localities; outcrops on Paulding and Williamsburg road, observed by Prof. W. D. Moore, 146, 147. B xviii TABLE OF CONTENTS. THE TERTIARY FORMATIONS— V. THE GRAND GULF GROUP; comparatively unimportant in spite of its extent; poor in useful materials; plays a small part in the surface conformation; whole formation marked by the presence of gypsum, common salt and, generally, of magnesian salts, 147, 148; localities; Section of the Bluff at Grand Gulf, Claiborne Co., 148; sandstone, lignite, silicified wood, clays, 149; Section at Loftus' Heights, Wilkin- son Co.; Wailes, Prof., on Grand Gulf Group, 150; other localities, 151; peculiar cleavage of sandstones, 152; fossil trunks and roots (stumps standing with the roots imbedded in the soil), of dicotyledon- ous plants; Conifers and Palms; Section exhibiting the strata contain- ing them, at Mr. Sam. Power's, near Winchester, Wayne Co., 153; Section of Bluff at Dwyer's Ferry, Jackson Co.; Newer Tertiary (?) of the Coast; partly marine, partly fresh-water; consist of black, fetid, massy clays, containing recent shells and plants; localities, 154; Section at Saucier's, on Wolf River, Harrison Co.; buried Cypress forest; successive generation superimposed upon one another, 155; useful materials of Tertiary; lignite, its uses, impurities, mode of ascertaining them, 156; determination of the amount of ash in lignite from five localities; presence of iron pyrite injurious, 157; mode of distinguishing pyrites from other metals, 158; practical value of lig- nite; increasing necessity for using it as fuel, 159; mode of working lignite beds; localities, 160; analysis of Lignite Ash from Hughes branch; other localities, 161; localities continued, 161 to 164; mineral fertilizers of the Tertiary, 164; analysis of Shongalo Greensand; potash and soluble silica chiefly make it valuable, 165; calcareous marls of the Tertiary; of two varieties, viz: white marls, and green- sand marls, 166; analysis of the Vicksburg Marl; experiments with, by Mr. Marshall, 167; Section of marl strata at Byram Station (Cook's Ferry); analysis of marl from Byram Station, 168; many joint clay marls; laminated yellow marl stone of McNutt Hill, 169; analysis of marl from Moody's Branch, Jackson; amonnt of lime in marls of N. Hinds and Madison Co's., 170; additional localities of marl, 171; analysis of Dr. J. Quin's marl, Rankin Co.; other localities, 172; localities continued, 173, 174; analysis of greensand marl from Garland's Creek; localities continued, 175; additional localities; blue marls preferable to white; gypseous marls, 176; calcareous marls of the Fresh Water Tertiary, 177; analysis of clay marl from Judge Hiram Cassiday's, Franklin Co.; large amount of potash in this marl, 178; Section of "Barnes' White Bluff," Marion Co., 179; analysis of Barnes' marl and remarks regarding it, 180; marls sometimes of local value only; Section at Burnett's Bluff, Marion Co.; analysis of green loam this locality, 181; gypsum, limestones, 182; limestones of Vicksburg Group; analysis of Vicksburg limestone, 183; other locali- ties, 184; analysis of limestone from Yost's Rankin county; best method of preserving lime, 185; other localities; building stones, 186, 187; waters of the Tertiary; of the Lignitic Groups, 187; abuse of mineral waters: ingredients common to the waters of the Lignitic, 188; waters of the S. Lignitic generally considered, 189; practicability of Artesian Wells below Vicksburg; waters of the Calcareous Marine Tertiary, 190; record of the bored well at the State Penitentiary, 191; record of wells bored by Rev. J. R. Lambuth, 192; Artesian Wells in E. Mississippi, 193. QUARTERNARY; divisible into five stages; Orange Sand previously treated of; BLUFF FORMATION; so named by Prof Swallow; district occupied by, and materials of, 194-5; fossils of, collected by Prof. Wailes-stud- ied by Conrad Leidy, 195; useful materials and waters of, 196; “YEE- TABLE OF CONTENTS. xix QUARTERNARY— * LOW LOAM"; constitutes a large portion of Mississippi Soils; posterior to the Orange Sand and Bluff formations-anterior to the Alluvium; anterior to the great denudation-posterior to the present river chan- nels, 197; further discussion of its stratigraphical relations, 198; Flatwoods soils—brick clay in, 199, 200; HoмMOCK OF SECOND BOT- TOM, 200-1; ALLUVIAL, 201. PART IL AGRICULTURAL REPORT. PRINCIPLES OF RATIONAL AGRICULTURE: definition and limitations of the term soil, p. 202; natural vegetation a guide to the quality of land; may, however, lead to error; not only the species of plants but their size and form must be considered; cases illustrating these points, 203; subsoils; proper mode of collecting and examining soils, 204; record of depth, at which taken always accompanies the analy- sis; value of analysis of soils asserted; virgin soils usually investiga- ted; origin of soils, 205; origin of soils; causes operating to produce them, action of water, of temperature, of chemical agents; fallowing, 206. PRINCIPLES OF AGRICULTURAL CHEMISTRY: necessity and value of technical terms; ingredients of soils; sixteen or seventeen elements claim the attention of agriculturists; named, p. 206-7; important combinations considered; Silicon, Sulphur, Phosphorus, Potassium and Sodium treated of, p. 208; Calcium; action of lime in soils, p. 209; calcareous soils; growth of; Magnesium, p. 210; Aluminum; clays; Iron, p. 211; "Soapstone"; retentive power of clays; Alum, p. 212; Iron; oxide of; in soils; injurious effects of; modes of remedying them, p. 214; bog ore or "Black Pebble"; importance of drainage; chaly beate springs, p. 215; formation of rock by waters charged with iron; nourishment of plants; constituents of plants; rotation of crops, p. 216; rotation of crops a systematic method of exhausting soils; order of rotation settled by experience; analyses of soils, crops and manures of practical value, p. 217; analyses of south- ern soils; discrepancies in results; physical constitution of soils; soil must be "open", "porous", p. 218; light or sandy soils; heavy clay soils; crack in drouth; retain moisture tenaciously, and so, in wet seasons, prevent tillage; prevent access of air, p. 219; heavy soils require deep and frequent tillage; heavy siliceous soils; defects of them; acid soils; contain crenic, and apocrenic acids in a soluble condition, p. 220; drainage-its value and effects; drainage of clay soils prevents injury from wet; warms the soil, p. 221; prevents soluble or liquid manures from being wasted or lost; prevents washing of the soil; improves the health of the districts in which it is practised; reader referred to Maj. H. F. French on Farm Drainage”, p. 222; conditions of productiveness in soils-1. Good Physical Constitution— 2. Good Chemical Constitution; when defective in either artificial correctives must be applied; general name of these manures; manures of two kinds, mechanical and chemical; the latter may be divided XX TABLE OF CONTENTS. PRINCIPLES OF AGRICULTURAL CHEMISTRY— into stimulant, and nutritive manures; examples of the benefit derived from mechanical manures, p. 222-3; washing may sometimes be turned to good account; chemical manures specially considered; "humus"; its mode of action; its properties, p. 224; clays to some extent a substitute for humus; green cropping-rationale of; ammon- iacal manures; ammonia required for the nutrition of plants, p. 225; also a stimulant; relation of leaves to ammonia; Peruvian Guano, 226; when is manure most profitable? Columbian Guano; Super- phosphate of Lime; effects of its use, 227; Chilian Saltpetre ; Common Salt; Gypsum; Quicklime and Carbonate of Lime, 228; action of lime, its beneficial effects detailed, 228-230; difference be- tween lime and marls, different condition of ingredients in soils and marls, 231; effect of marls transient, why, cases, 231; classification of marls; I. CRETACEOUS MARLS include, Greensand Marls, Clay Marls, Greenish Sands. II. MARINE TERTIARY MARLS. III. CLAY MARLS OF THE UPPER FRESH WATER TERTIARY. IV. FRESH WATER MABLS LATER THAN TE!TIARY, 231–233; marling, directions as to, overdrainage, Mr. Ruffin's Treatise referred to and recommended, 234; effects of marling on health, gypseous marls, stable manure, its great value, composting, 235-236, comparative value of fresh and rotten manure discussed, method of culture, robbing the soil, 238; imminence of exhaustion, exhaustive culture irrational, 239; culture of too much land, restoration of exhausted soils, rotation of crops, 240; is only a systematic mode of exhausting the oil, order of rotation in southern crops not yet determined, rotation valuable in manured lands, 241; rule for preserving the fertility of a soil-return to it so fur as practicable everything taken from it; cotton one of the least exhausting of crops, value of cotton seed as a manure, 242; best method of ap- plying it, its mode of operation, 243; improvidence of using cotton seed as food, manufacture of cotton seed oil improvident, unless the cake and hull be returned to the soil, selling cotton seed is really selling manure, 244; waste of cotton seed in the Mississippi Bottom, 245; Subsoiling consists essentially of two processes, deep plowing tempers extremes of wet and drouth, but turning up the subsoil to the surface is not always desirable, under what circumstances it is desirable shown, cases illustrating the principles laid down, 245, 6, 7, 8 ; Tullian or Lois Weedon system denounced, drainage, 249; dung- producing system of culture shown to be fallacious, 250, 1; what becomes of the lost fertility of soils ? how can a maximum of fertility be perpetually maintained? 251, 2. SPECIAL PART--AGRICULTURAL FEATURES OF THE STATE OF MISSISSIPPI; THE NORTH-EASTERN PRAIRIE REGION: its limits, not implied that the whole district is prairie in its character, is char- acterized and determined by the cretaceous strata, 254; Tishomingo and Itawamba, lands of Big Bear, and Yellow Creeks, 255; character- istic growth, 256; soils of E. Monroe and the valley of the Tombigbee ; peculiar growth, 257; hommock of the Tombigbee, its vegetation, "white lime country " of Tishomingo and Itawamba, 258; "Mahog- any Soils", "Beeswax Hommock", Black Prairie Soil, soils near Farmington, 259; Corinth, Planville, Hatchie, Tuscumbia and Rich- mond, their soils and vegetation, 260; the prairie region proper, soils and peculiar growth, 261; Monroe prairie soil, Monroe prairie under- subsoil, 262; analysis of latter; relations of soil and subsoil, of these prairies, defects and remedies of, 263; advantage of deep plowing and drainage; bald prairies require vegetable matter; prairie uplands of Kemper and Noxubee, 264; their crops and natural growth; lands of TABLE OF CONTENTS. xxi SPECIAL PART-AGRICULTURAL FEATURES OF THE STATE OF MISSISSIPPI; N. E. PRAIRIE REGION- $ E. Tippah, 265; lands between the forks of the Hatchie; between the heads of Hatchie and Tallahatchie; S. Tippah and the Pontotoc Ridge, 266; "the Buncombes", "Red Sands", "Mullatto Soils", 267; analysis of Mulatto Soil", "Beeswax Hommocks" and "Bald Prairie Soils" of the Pontotoc Ridge, 268; brokenness of the surface only drawback to the Pontotoc Ridge lands; Waters of the N. E. Prairie Region, 269; analysis of water of "Gum Spring", "" Box Spring", of a mineral spring near Fulton, and of clay from a mineral well on Bull Mountain, 270; waters of the Rotten Limestone Region, deepest near the western border of the territory; localities of well, 271; bored and Artesian wells of Monroe and Lownds, 272. THE FLATWOODS REGION: geographical position and surface conformation, p. 273-4; two varieties of soil in this region, viz: light, sandy, and heavy, clayey; growth, 274-5; analysis of light, and heavy flatwoods soil, 276–7; culture of light flatwoods soil, requires clay and vegeta- ble matter, 277-8; cultivation of heavy flatwoods soil, requires lime vegetable matter, sand and drainage, 770-280; the white oak flat- woods; peculiarities of soil and growth, 280; hills of the flatwoods region; localities; peculiarities of soil and growth, 281-2; bottom soils of the Flatwoods; vegetation; springs and wells, 283; bored wells N. and W. of Houston; localities and depths; waters S. and S. E of Houston; wells and springs in the hills of the Flatwoods, 284, 5; mineral waters characterize the wells generally; abuse of these waters, 286, 7. THE YELLOW LOAM REGION: boundaries of the district, its soils defined generally, peculiar vegetation, p. 288; all degrees of transition between the extremes of soils specified; relative value shown by the forest growth, form and size of trees of material account in judging, specific directions given, 289, 290; table lands of Marshall and N. W. Tippah, peculiarities of soil and timber; analysis of soil and subsoil of Mar- shal: county Table Lands, 291, 2; consideration of the analyses with reference to the improvement of these soils, 292; table lands of N. W. Tippah; waste from washing; importance of " circling", 293; necessity of accurate levelling, easy method of making a level; deep plowing an additional preventive of "washes " 294, 5; country S. of Wolf River and W. of Tippah Creek, 295; Lafayette county, 296; lands of Yallabusha county, 297; lands of Carroll and N. E. Yazoo, 298; land of N. Attala; uplands bordering the Poukta; fertility of the "Red Hills ", 299; lands of S. Attala, N. E. Leake, N. Madison and Calhoun, 300; their vegetation; upland soils of Winston, 301–2; lands E. of the Nanna Wauya; face of the country; growth, 302; ridge soils of Kemper; soils near Daleville; culture of the vine; peculiarities of these soils best studied on the ridges of the Tallahoma W. of Garlandsville, 303-4; height and beauty of these ridges; bottom soils of the Yellow Loam Region, 305; often sandy; often cut through lignitic strata and become clayey, 306; soils of the Talla- hatchie Bottom, of the Yockeney--Patala, of the Loosha Scoona, of the Big Black, 306, 7; hommock soils of the last; peculiarity of soil on Dr. Vaiden's land near Shongalo, 308; the solis of Pearl River Bottom; vegetation; soils of the Ycckanookana, 309; waters of the Yellow Loam Region; bored and Artesian wells; water would prob- ably be obtained at Oxford and Holly Springs at 7 or 800 feet, 310; mineral waters of this region classified, viz: alkaline chalybeates, saline chalybeates, and alum waters, 311, 312. THE NORTHERN RIVER COUNTIES: p. 312. xxii TABLE OF CONTENTS. THE SOUTHERN RIVER COUNTIES: extent of territory; surface con- formation determined by deposits of calcareous silt known by the name of the Bluff Formation; the silt overlaid by from 3 to 10 feet of brown loam; depth of silt from 25 to 30 feet on an average, p. 313; peculiarities of roads in this region, 314; hills and streams of the formation, 315; soils of the uplands in this region reducible to two classes, viz: those derived from the brown clayey loam, and those derived from the light calcareous loam silt, 316; growth characteris- tic of each; analyses of upland soils, 317, 318; remarks upon these analyses, 319; diagram illustrating denudation in the Bluff Formation, 320; subsoil more fertile than the fresh surface soil; requires fallow- ing and stimulating; material for the latter to be found, in the calcareous silt, close at hand and easily transported, 321; brown loam easily distinguished from the silt; subsoil and silt both lacking in vegetable matter; great injury done by washing, 322; lands intervening be- tween Cane Hills and Pine Hills; soils of the Homochitto Hills, of the Hamburg Hills; the Cucumber tree the prominent botanical feature of the latter, 323; limited district occupied by this tree; peculiar soils near Rocky Springs, lacking in clay and vegetable matter, 324; Grape Culture in the Cane Hills, 325; bottom soils of the Southern River Counties; vallies of the streams peculiar, growth, 326; hommocks; bottom lands between the hills and the Mississippi River; springs, wells and mineral waters. 327; calcareous and magnesian ; cisterns generally resorted to, 328; E. of the Cane Hills the water usually in greater quantity and of better quality; notice of a remarka- ble spring, 320. THE CENTRAL PRAIRIE REGION: prairies not the prevalent feature of the surface; " Gypseous Prairies", "Hog wallow Prairies", "She'l Prairies"; origin of these names, 330; the ridge lands of the region bear the character of the Yellow Loam, or Long-leaf Pine Region; Warren and Yazoo, Hinds and Madison; the Zeuglodon-desirable- ness of securing an entire skeleton, 331; loam uplands of Madison and N. Hinds the best in the State; an improvident culture rapidly destroying them; analysis of Yellow Loam subsoil from Hinds coun- ty; remarkable results of deep plowing in this soil, 332; marls advantageous; need of drainage; corrective of tendency in this soil to shrink and crack; short-leaf pine ridges, 333; fertility of these ridges; prairies in Hinds county; oysters and crystals of Gypsum abundant on them; "salty" spots in fields-their causes and remedy, 334; Pearl River Soils; Rankin and Scott, 335; character and growth of their soils; Gypsum Prairies; why so called, 336; analysis of soil, and underclay of gypseous prairie, 337; means of improving these soils; patches of "black prairie soil" sometimes found in the gypseous prairies; do gypseous clay soils rust Cotton ?, 338; Rankin N. of the Peelahatchie; soils of S. Scott; effect of the bluish or yellowish matrix of the Zeuglodon bones upon crops, 339; soils of Smith and Jasper; oak lands between Leaf River and its western confluents, 340; analysis of Leaf River Prairie Soil; Hog Wallow Prairies; extent and character, 340-1; other characteristics of this region; analysis of Hog Wallow Prairie Soil, 342; deductions from this analysis; E. Jasper; Paulding Ridge, 343; Clarke and Wayne; bottom soils; Chickasawhay bottom; peculiar growth; prairies of the Jackson Group, 344; continued, 345; waters of the Central Prairie Region, poorly supplied; generally mineral and too strong for daily use, 346; wells in Jackson; Mrs. Nichols', Capt. Mizell's, 346; Mississippi Springs and Cooper's Wells, 347. & TABLE OF CONTENTS. xxiii THE LONG-LEAF PINE REGION: extensive district occupied by; promi- nent forest tree-Long-leaf Pine; concomitant trees; frequency, shape and size of these trees mark variations of soil, 348; general character of the bottoms; herbaceous vegetation and undergrowth of the region, 349, 350; soils of the region westward of E. Marion ; on the head waters of the W. Amite; analyses of Pine Upland Soil and Subsoil, 350-1; deductiens from these analyses, 352; soils E. of Holmesville; culture in the Long-leaf Pine Region proper confined to bottoms and hommocks; vegetation of these; lands of Simpson county, 353; lands on the Bowie; between Westville and Monticello, 354; Pearl River flat below Monticello; between Silver and Green's Creek; between Columbia and Monticello, below Columbia; Burnett's Bluff, 355; first bottom of Pearl River; Okatoma bottom; ridges dividing Okatoma and Okahay; analysis of Pine Hill Soil, 356; an- alysis of Pine Hill Under-Subsoil; deductions from these analyses, 357; Okahay bottoms; Jones and Perry, S. Wayne; hommock of the Chickasawhay; 358; same continued; improvement of the Long- leaf Pine Region, require nutritive manures primarily; Pine Straw most available, 359; analysis of Pine Straw; practical inferences; mode of applying Pine Straw, 360; value of this substance as a manure; pasturage in the Pine Woods, 361; ruin of this pasture impending; waters of this region; localities of fine springs, 362; mineral waters; analyses of mineral waters, 363; additional locali- ties and analyses of mineral waters, 364. THE SEA-COAST COUNTIES: change of vegetation as the coast is ap- proached; plants, 365; bottom soils of the Pascagoula; defects, growth and improvement, 366; soil of ridge between the Pascagoula and Black Creeks; shallow ponds; their peculiar vegetation 367; soils of Black Creek Bottom, Red Creek Bottom and the dividing ridge between them, 368; soils and vegetation of the Pascagoula bottom, 369; of Big Bluff Creek; the Pine Meadows, 370-1; analysis of Pine Meadow soil; practical inferences therefrom, 372 ; Shell Hommocks; only two species of shells in them, how formed vegetation, 373; the marshes, mode of occurrence; difference between the marshes of the smaller and larger streams; two kinds, viz: the Cutting Rush, and Round Rush Marshes, 374; change from one te the other; how effected; composition and reclamation of marsh soils, 375; analysis of soil from a Cutting Rush Marsh; of Marsh Muck, 376; analysis of soil from the marsh of Pearl River; discussion of the analysis, 377; other localities of similar soil; clay and lime needed, 378; sources from which they may be obtained; change of soil in approaching Ocean Springs, 379; improvement of the Sand Hom- mocks; origin of the Shell Hommock Soil, 380; means of improving the Sand Hommocks, 381; outcrops of clay; subterranean Cypress forest, 382; Sea-island Cotton Plantations; soils on the road from Pearlington, N., 383-4; waters of the Coast; frequently mineral, 385; usually saline chalybeates; coast islands; growth and soils, 386; tides of the coast; importance of the G. and Ship Island R. R. to the interior, 387. APPENDICES A. B. and C. xxiv NOTE. In the absence of Dr. Hilgard I am compelled to state, by way of appology, to him and to the readers of the Report, that lack of space has obliged me to substitute for an exhaustive index, alphabeti- cally arranged, a Table of Contents: I have labored to make this as minute and full as possible, and hope that the careful reader by its aid will be able to turn rapidly and readily, to whatever he may desire to find in the text. The few errata deemed of sufficient importance to correct, are here subjoined: On p. แ 39 3—“ Marine Animal" should be opposite "Ripley Group and the three lines just below brought up accordingly. "240-immediately preceding T482, for "Retoration " read- Restoration. "301-in the heading, for " Alterations ", read-Alternations. "304-in the sixth line of ¶650, for "properly" substitute popularly. Two blanks involving the number of acres embraced in the Sea- Island Cotton Plantations, and the amount of cotton per acro produced on these, I have been unable to fill, the only information relative to these subjects, in the U. S. Census, being the return of 70 bales from Hancock County. W. D. MOORE. JACKSON, Sept. 14, 1860. PART I. GEOLOGICAL REPORT. ་ 1. Configuration of the Surface.-There are, probably, few States in the Union, concerning the aspect of whose surface erroneous impressions are more generally prevalent, than is the case with Mississippi. The reputed character of a comparatively small portion of its territory-the Mississippi Bottom—is very commonly referred to the greater portion, or to the whole of the State, among whose features, swamps, marshes and mosquitoes are thought to hold a prominent place. It may not be superfluous, therefore, to premise, that outside of the Mississippi Bottom, sand hills, with Pine, Black Jack and Post Oak, are a very conspicuous feature in the landscape; the surface being generally hilly, though nowhere mountainous. Few of the ridges probably rise as high as 400 feet above the drainage of the country, the usual elevations of the hills above the minor watercourses being from 30 to 120 feet; and none probably are above 800 feet in absolute elevation. All the inequalities of surface at present existing in Mississippi, arc due to denudation-formed by the action of water. There are no hills or chains of upheaval properly speaking; for, although many are composed chiefly of strata possessing a sensible dip, they are elevated above the rest of the country only because these have to a great extent been washed away, without being, at the present time, replaced by other deposits. 2. The dips are mostly very slight, so as to be rarely perceptible in one and the same locality, and often difficult to demonstrate R-1 2 [T3 GEOLOGICAL REPORT. without actual surface levelings. The dips of the cretaceous strata has been best proven, and its amount approximately ascertained, by the artesian bores which have been numerously made in the region they underlie. In Lowndes and Noxubee counties, according to data collected by Dr. William Spillman, the dip is from 25 to 30 feet per mile, towards the S. W. Further N. the direc- tion of the dip changes to the westward, and near the Tennessee line is nearly due W.; while in middle Alabama, according to Tuomey, the dip is nearly due S. In other words, the strata incline away from the great upheavals of the Alleghany range, the cretaceous belt skirting what may be considered the last spurs radiating from the mountains. [See Paragraph 78.] The strata of the Tertiary also possess a slight dip, as is shown by the rise of the water obtained in boring wells, in the southern portion of the State; and by the gradual sinking below the waters edge, as we advance southward, of the strata exhibited in the banks of the streams which, like Chickasawhay and Pearl Rivers, follow in general a southward course. The dip of the tertiary therefore coincides, in the main, with that of the cretaceous formation. 3. In view of these facts, we should expect to find the highest elevations in the north-eastern portion of the State. With respect to the average level of the country, this undoubtedly holds true, as is shown by the course of the larger rivers; but the rule is very much modified, as regards the highest relative elevations, above the general level of the drainage. For after we recede 70 to 90 miles from the sea-coast, the average level ascends but slowly, and we find relative elevations at least, equal to those in the N. E. portion of the State; and thence northward, no inference as to the hilliness, or the relative elevations of a region, can be drawn a priori from its position, either in longitude or latitude. In the latter direction, there is perhaps a little more regularity than exists in the former; the highest relative, as well as absolute, elevations being, on the whole, E. of a line drawn N. and S., through the center of the State. A notable exception to this rule, however, occurs in the extreme S. W., where the Mississippi river is skirted by ridges, some of which are elevated probably more than 400 feet above its level. Some of the highest ridges in the heads of Pearl River, in Newton, State are said to exist on the Neshoba, and E. Attala-a region with which I am not personally T4] GEOLOGICAL STRUCTURE. 3 acquainted; while the highest ridges in N. Mississippi of which I have any knowledge exist in the waters of the Hatchie, in E. Tippah, and in the hilly region dividing the waters of the Hatchie, Tallahatchie and Tombigbee. A table of such determinations of elevation as I have been able to obtain, will be found in the Appendix, at the end of the present volume. 4. Geological Structure.-The general geological features of the State are simple, and will be readily understood, in connection with the foregoing remarks, by reference to the geological map ; the subjoined table of the formations occurring in the State, their several stages, principal materials, and character of fossils; and the general section, Fig. I, Table 1, in which, for the sake of a fairer representation than could otherwise be given, a curved line of projection (as indicated on the little map subjoined) has been adopted. TABLE OF THE FORMATIONS OF MISSISSIPPI. Quaternary. NAME OF FORMATION. Cretaceous. Tertiary. NAME OF GROUP. ALLUVIUM PRINCIPAL MATERIALS. Soils, sand-bars, etc., FOSSILS FOUND. Living plants and animals. SECOND BOTTOM YELLOW LOAM BLUFF FORMATION ORANGE SAND COAST PLIOCENE? GRAND GULF GROUP VICKSBURG GROUP LIGNITIC JACKSON GROUP LIGNITIC "Hommocks," Brown and yellow brick-clays, Calcareous silt, Sands, pebbles, clays, Black fetid clsys, ? ? Terrestrial, part extinct. Those of underlying formations. Living marine shells, living trees. Light colored clays; white sandstones, Plants partly extinct? Lignite. Marls and limestones, Marine animals, Plants Lignite. Marine ani mals. Black clays, Marls and soft limestones, Black clays, CLAIBORNE GROUP { Marls and limestones, Siliceous sandstones, Black and grey clays; yellow sands, Plants partly extinct; Lignite. Plants, Lig nite. Marine animals. Marine animals. NORTHERN LIGNITIC RIPLEY GROUP ROTTEN LIMESTONE TOMBIGBEE SAND EUTAW GROUP Marls and limestones, sandy, Soft chalky limestones, clayey, Greenish micaceous sands, Dark colored clays, sand, Marine animals. Marine animals. Marine animals. Plants, extinct; Lignite. Carboniferous. LIMESTONE SANDSTONE BLACK SLATE Fetid, crystalline limestone, ciliceous sandstone and chert, Hydraulic limestone, Marine animals. Marine animals. ? It will be perceived that four only of the principal geological periods are represented, viz : the Carboniferous, Cretaceous, Tertiary and Quaternary. In each of these, several stages, or minor sub-- divisions require to be distinguished. But before entering upon a special discription of these, it is necessary to premise, that with. 4 [15 GEOLOGICAL REPORT. the exception of the territory occupied by the alluvium of the Mississippi Bottom, and by the Bluff formation of the Southern River Counties, the formations laid down on the map do not, as a general thing, occupy the surface to any considerable extent, nor even do they in most cases, immediately underlie the arable stratum of their region of occurrence. The latter, in most of the better class of upland soils, is formed by a yellow or brown loam, of an age more modern than the Bluff formation (which it frequently overlies), and from two to ten feet in thickness. But the forma tion which gives character to the surface conformation of the State-whose presence is the rule, and whose absence the exception requiring special mention; which forms the main body of most ridges, and to a very great extent, their surface also is that which has been very appropriately designated by Prof. Safford. the State Geologist of Tennessec, as the ORANGE SAND formation, 5. It may appear surprising at first sight. in view of these facts that this important formation should not have been laid down, or even mentioned, on the geological map; but the very universality of its occurrence has made this a matter of necessity, unless the other formations were to be concealed by it on the map, in the same manner in which they are in nature: so much so, that this very formation is among the most serious obstacles in the examination of the more ancient formations of Mississippi, and that a proper understanding of its peculiarities is the first necessity in the study of the geology of the State. And since even a description of the other formations involves, of necessity, a continual reference to these peculiarities, it may be best to give the special description of the Orange Sand formation, out of its proper order in the geologi- cal series, as a key and introduction to the geological structure of Mississippi. $ THE ORANGE SAND FORMATION. 6. As has been stated above, the Orange Sand formation characterizes the greater part of the surface of the State of Mississippi. It is entirely wanting only in the alluvial bottom of the Mississippi River; and it occurs to a limited extent only in the following districts: 1st, In the territory of the Bluff formation, skirting the Mississippi River southward of Vicksburg, to the Louisiana line. Above Natchez, the Orange Sand formation usually runs out at a distance of 8 or 12 miles from the Mississippi River, where it appears underlying the calcareous silt of the Bluff formation, sometimes only a few inches in thickness, but increasing rapidly as we advance inland; below Natchez, however, we find it forming a high Bluff of considerable extent (the White Cliffs) on the Mississippi River itself; and at Fort Adams, on Loftus' Heights, it appears in a stratum about 90 feet in thickness, overlaid by a stratum 73 feet thick, of the materials of the Bluff formation. It probably appears on many intermediate points also.-2d, In the territory occupied by the Jackson Group of the eocene tertiary. It is absent from the prairies of this district, (whether of the gypseous or caleareous character), but usually forms the ridges skirting them; it is wanting also, in the "Hog-Wallow- Prairie" district of the same region, in N. E. Smith and N. W. Jasper counties, but nevertheless forms all the ridges bordering on the same.-3d, It is wanting in a large portion of the territory occu pied by the Rotten Limestone Group of the cretaceous formation, viz: on the prairies, and the gently undulating oak uplands skirting them. And finally, it is absent, or but feebly represented, 4th, In the "Flatwoods" region, and particularly, in the "Flatwoods" proper. In remaining portion of the State, the ground is either occupied by the members of the Orange Sand formation, or else, when the more ancient strata form ridges by themselves, it is only in limited patches. Very frequently, the older deposits form the beds of the streams, where they crop out in bluffs; constituting also the lower portion of the hills, which are capped with Orange 6 [17, 8, 9 GEOLOGICAL REPORT. Sand strata—overlaid very generally, by the Yellow Loam deposit previously referred to, which is one of the newest formations of Mississippi. 7. The thickness of the Orange Sand formation is extremely varia- ble. As originally deposited, its strata appear to have been dependent, as to their thickness, on the degree of denudation which the strata of the more ancient formations had previously undergone; but at present, the extensive denudations which have taken place in the Orange Sand formation itself have added a complicating element ; so that a most extraordinary capriciousness in this respect, charac- terizes these deposits. The greatest thickness observed with certainty, to my knowledge, was in a well dug at the University of Mississippi, to a depth somewhat more than two hundred feet; and a section of about the same thickness occurs, according to Prof. Wailes, at the White Cliffs, in Adams county. One hundred feet is no unusual thickness; but most commonly it varies between 40 and 60 feet. Even on different portions of one and the same acre of ground, great variations frequently occur. Thus, in the town of Brandon, wells N. of the R. R. cut reach water at 45 feet, passing through Orange Sand strata all the way; while S. of the cut, the gray clay of the Upper Lignitic formation is struck after passing through a few feet only of sand. 8. The existence of hills of more ancient formations within those of the Orange Sand, as exemplified in diagram No. 2, (¶39,) is shown in numerous profiles, all over the State; nor does the exter- nal shape of these ancient hills leave any doubt as to their having been, themselves, originally formed by denudation, and afterwards covered over by the Orange Sand deposits. In such cases, the lines of deposition of the Orange Sand usually exhibit, near to the line of contact, slight inflections, conformable to the curvature of the interior mass; but the general horizontality of the stratification lines is not thereby disturbed. Nor do I know any instance of the departure from horizontality, in the Orange Sand strata, which could be referred to an upheaval, either local or general. The water obtained within these deposits, never exhibits any tendency to rise. 9. It is not to be inferred, however, that the stratification of this formation is remarkable for regularity. On the contrary, it is. often extremely difficult to trace out one and the same stratum, or L S d. 60 0.0. STRATIFICATION OF THE ORANGE SAND FORMATION. FIG. 1. G FIG. 2. H Plate II. FIGS. 1 and 2.-Sections from cuts on the New Orleans, Jackson and Great Northern Railroad, near Summit, Pike Co. FIG. 3. FIG. 3.—Section from a cut on the Mississippi Central Railroad, at Oxford, Lafayette Co. S Stratified Sand. C Pipeclay. H Brownish Hardpan. G Small Gravel. P Pebbles. • ¶01 11,] STRATIFICATION OF ORANGE SAND-MATERIALS. 7 stratification line, for any considerable distance. Not only does the material of which it is composed undergo entire changes within very limited areas, but the stratification lines themselves often exhibit the most fanciful irregularities, often coming square up against one another, and frequently exhibiting successive parallel lines of deposition forming a large angle with the lines of contact adjoining strata. Fig.'s 1, 2, and 3, Pl. II representing profiles occurring in R. R. cuts in Lafayette and Pike counties, will illustrate this irregularity both with reference to stratifications and material; nor is it to be supposed, that instances of this kind are exceptional; they abound wherever the formation prevails in force. Even where horizontal lines of deposition can be traced for some distance, they are usually themselves wavy on a small scale. No one can fail to be struck by the similarity of the stratigraphical character of the Orange Sand, with that which may be studied to advantage on the banks of the Mississippi river at low stages of water, in the alluvial deposits. And there can be little doubt that the Orange Sand has been deposited in a similar manner, by flowing water; especially when the evidence afforded by the character of the material (rounded grains of sand and pebbles; see below) is taken into account; the grains of which, in all cases which have come under my observation, are more or less rounded, and without sharp angles or edges; which explains the common observation, that these sands are a very poor material for scouring purposes. 10. Character of Materials.-As the name indicates, the preva lent material composing this formation, are siliceous sands. They are usually colored, more or less, with hydrated peroxide of iron, or orange-yellow ochre. The color thus imparted is sometimes very deep and glaring; as on the Pontotoc Ridge, in eastern Itawamba county, and many other localities; more frequently, it is a dull rust color. In the southern Pine region (as in Smith, Marion, and Pike counties), it is often of a delicate rose hue; bright yellow tints are frequently found, and deposits of white sand are not uncommon. An endless variety of tints intermediate between the above, of course exist; and locally, crimson, purple, and almost blue tints, fancifully co-ordinated, may be observed. 11. Whenever the amount of iron contained in these sands is somewhat considerable, they exhibit a tendency to conglomerate; 8 [11 GEOLOGICAL REPORT. and thus ferruginous sandstones are formed, of all degrees, from a fricable mass to a solid rock of considerable hardness, and well suited to building purposes, when stones of the proper dimensions can be obtained. The several varieties of this rock play a promi- nent part in the topography of the State, and some of them claim our attention on account of their practical usefulness. I do not know of any instance in which a notable stratum of this ferrugi- nous sandstone is found much below the present surface of the locality of occurrence. These ledges (of a few inches at most) are sometimes found at some depth, where a seam of denser mate- rial (e. g. clay) has arrested the further progress of a ferruginous solution, which otherwise would have imparted only a slight general cohesion to the whole mass of the sand. But commonly, the several varieties of this sandstone are found on or near the surface, capping the summits of hills and ridges; and in truth, it is difficult to find an Orange Sand ridge of any importance where little slaty fragments, at least, of this rock, are not scattered about on the summit. Wherever an unusually elevated knoll is seen on these ridges, it is certain to be found capped with a deposit of this rock, partly remaining in place, on the summit, partly strewn adown the hillside. And even as we find these rocky knolls perched, as it were, on top of the ridges, so in level, or gently undulating tracts, elevated but little above the drainage of the country, we often see short ridges, or isolated hillocks of a truncated-cone shape, rising abruptly out of the plain, to the height of 70 to 150 feet and usually crowned with a clump of pines-a tree not seen for miles around perhaps, in the level country, and whose roots can with difficulty gain a foothold in the shallow soil, and crevices of the level ledge of dark colored sandstone which forms the summit. Cases in point are of frequent occurrence in North Mississippi; the counties of Tippah, Marshall, Lafayette, Carroll and Yallabusha furnish abundant examples; especially the gently undulating, fertile yellow-loam region of the latter county, where a number of these isolated pillars, now forming prominent landmarks in the plain, are left standing to show, apparently, the original surface level of the country, after the subsidence of the flood which spread over the older formations, the immense masses of sand which now cover the greater portion of the State. And it is to these rocky caps, no doubt, that these elevations owe their escape from the T12] FERRUGINOUS SANDSTONE. 9 denuding action which has removed the rest of the stratum. 12. It is comparatively but rarely the case, however, that solid ledges of any considerable thickness are found on these summits. Solid ledges of 4 feet are not common, and but two cases are known to me in which their thickness amounts to ten or more feet. Most usually they consist of connected masses of fantastical shape, such as concretionary bodies are wont to assume; the interstices are filled with loose, or loosely cemented, sand. The latter, as might be supposed, is washed out in course of time, where the stratum is exposed to the weather; and when the remaining harder portions are broken asunder, it does not require a strong imagina- tion to recognize in them the remnants of works of art; and nothing can convey a better idea of the prevalent forms, and character of the material, than the popular likening of such spots with the "ruins of a forge," or more properly, those of an iron foundry. There are angular plates, of several square feet, of plane surface, straight edges (the latter often provided with a regular rim,) and of uniform thickness; smaller plates, of a similar character, joined together at various angles, like fragments of boxes; others channeled, and variously curved, so as to form gutters and very frequently, tubes of considerable length and diameter, and remarkable regularity of shape. In some localities (as for instance, in S. E. Tippah, near the heads of Hatchie,) complete assortments of tubes may be seen strewn about on the hilltops-sometimes five feet in length, and of various bores from inch to four inches. The rough sandy surface, and even the color of these concretionary forms, renders them strikingly similar to newly made castings; in districts where such forms are common, springs are not unfre- quently provided with spouts and gutters from these natural warehouses. Sometimes these tubes may be found in place, ensconced in a mass of rock, so as to allow of blowing or even seeing through the latter. When thus in place, I have generally found them pointing in a N. E. and S. W. direction. Similar tubes and concretions of various shapes and sizes, are in many localities found isolated, in the interior of loose sandy strata; the hollows being, as in the case of those found on the hilltops, filled with loose ferruginous sand, or sometimes with yellow ochre. Round and oblong concretions of this kind, of small size, are very common in the neighborhood of Oxford; portions of them have been used as drinking cups. • and 10 [T12, 14, 15 GEOLOGICAL REPORT. 13. This ferruginous sandrock is very commonly designated as "iron ore" among the people. It contains, however, much less iron than the aspect and weight of the material generally lead us to expect; average specimens yield from 60 to 80 per cent. of white 'sand. Iron ore of good quality, in the form of brown hematite, is occasionally found, partly in the form of small variously shaped nodules, statactitic in the interior (as in the S. W. corner of Tippah county), partly in thin sheets of pure fibrous ore, interstratified with sand, (as in Tishomingo county, and other localities near the Alabama line). I have nowhere, however, found it in quantities sufficient to justify the erection of a furnace, and where its occurrence in large masses has been reported, a dense variety of the ferruginons sandstone has commonly been mistaken for workable ore. 14. It is an interesting fact, that the formation of similar sand- stones is still in progress, in numerous localities. In depressions, or in the heads of hollows, where forest leaves or other vegetable matter decays in contact with the ferruginous sand, the iron is dissolved as proto-carbonate, giving rise to chalybeate waters, which at times may be obscrved in almost every rill of Orange Sand formation. Such waters in percolating through the sand, deposit in it their iron; especially where they meet an impervious seam, of clay or other material. Thus the whole mass gradually indurates, and hard ledges are formed within it, producing precisely such shapes as we now find in the deposits on the hilltops. The cementation of the sand of the latter into ferruginous sand- stone, also took place, most probably, long after the deposition of the stratum; and here too we find the ledges underlaid, generally, by an impervious layer of clay or clayey sand. As a general thing, the sands of the formation are less ferruginous, and ferruginous sandstone is less common, in the southern portion of the State, than in the northern; the sand also is generally finer, and more frequently micaceous. This is more especially true of the central belt, N. and S.; while as we approach the channels of the Mississippi and Tombigbee Rivers, this difference is less perceptible, and the materials quite coarse, down to a low latitude. 15. It has been mentioned, that white sands are occasionally found in the Orange Sand strata. Similarly, white, siliceous sandstone occasionally occupies the place of the ferruginous sand- ¶16, 17] SILICEOUS SANDSTONE-PEBBLE BEDS. 11 stone above described. This feature is, however, of comparatively rare occurrence, and confined to small areas, or patches. Usually, this siliceous sandstone, also, caps the hills; it is sometimes, however, found below the hilltops, and overlaid by Orange Sand with ferruginous sandstone. Sometimes (as at Rockyford, Pontotoc county,) it is rather soft and even friable, exhibiting the peculiar stratification of the Orange Sand; but most generally it is remarkable for its extreme hardness, which renders it very difficult to work. It was a block of this character, derived from a limited deposit in N. W. Tippah county, which was quarried for the purpose of furnishing a stone for the Washington Monument; but the stone-masons at Vicksburg, to whom it was submitted, to be put into shape, found it so intractable, that a block of the Vicks- burg limestone, from a quarry on the Yazoo River, was sub- stituted instead. Deposits of a similar character occur in N. Attala county; at Burkettsville, and on the ridges N. and N. E. of the place; also in Holmes county, between Durant and Rockport stations, where it is frequently exhibited in cuts on the Mississippi Central Railroad, usually underlaid, at no great depth, by the impervious gray clays of the Lignitic. 16. Its mode of formation is well illustrated by a very small deposit occuring five miles S. W. of Oxford, which consists of unconnected blocks, buried in whitish sand, and. of rounded, menilithic forms, precisely such as are formed by the wet sand when water is poured upon a mass of dry sand. It appears as if a solution of silex had flowed over the sand in the locality mentioned, imbuing only portions of it, which afterwards solidified into rock. Similar shapes are commonly observed on the under surface, or edges, of continuous deposits. Other instances of silicification occurring in the Orange Sand, as well as the description of an apparently fossiliferous variety of this rock, will be given below. 17. Pebble Beds.-The material next in frequency of occurrence to the various kinds of sand above mentioned, is pebbles or shingle, either cemented into puddingstone or, more frequently, loose and commingled with sand or clay. The stratigraphical position of the main pebble stratum appears to be, most generally, below the heavy strata of Orange Sand proper; it is not unfrequently, however, underlaid by similar sand deposits, and minor deposits especially of small pebbles, occur occasionally in the upper strata of the Orange Sand formation. There are within the State, two distinct regions of occurrence, in which this material appears in force. One of these extends along the eastern edge of the 12 [T18, 19 GEOLOGICAL REPORT. alluvium of the Mississippi River, occupying, in N. Mississippi, parts of the counties of De Soto, Panola, Yallobusha, Carroll, Holmes, and Yazoo, gradually diminishing as the territory of the fossiliferous eocene is approached, and giving out almost entirely in the greater portion of Warren county. Then, below Vicksburg, it extends inland in a S. E. direction, and is found in numerous cuts on the New Orleans, Jackson and Great Northern Railroad, down to the Louisiana line. It appears in greatest force W. of the dividing ridge, and is but thinly represented on Pearl River; on the waters of the Bogue Chitto, however, it advances eastward, appears at Holmesville, and to a limited extent, in Marion county, on Pearl River. Westward of the dividing ridge, it is frequently met with until we reach the territory of the Bluff formation, where it is generally covered by the materials of the latter; as it is elsewhere by the yellow surface loam. 18. The other region of occurrence of the pebble bed, begins at the N., on the Tennessee River, in E. Tishomingo, and extends along the waters of Big Bear Creek, to the eastern heads of the Tombigbee, reaching the latter stream by way of Hurricane and Bull Mountain Creeks, in Itawamba county. It then extends southward on the eastern side of the Tombigbee, and is continued into Alabama, meeting the great pebble beds of the Warrior, which bear the city of Tuscaloosa. It appears that the pebble beds, as well as the Orange Sand in great force, are found well developed in the northern counties of Alabama. Great masses of pebbles are being moved southward, from these beds, by the Warrior and Tombigbee Rivers, whose navigation they tend to obstruct; the materials of the more ancient beds, however, as well as of those now being formed by the rivers, become finer as we advance southward, and ultimately mingle, imperceptibly, with the sands of the Coast. (Tuomey.) Whether or not the two great belts of pebble deposits are connected with one another, somewhere in W. Tennessee, I have not learned; but from the direction of their respective outlines, where they leave Mississippi, such a junction seems highly probable. Between the two belts mentioned, pebbles are either absent from the Orange Sand formation, or appear only casually, and of inferior size-as small gravel. Some of the latter, however, as well as, occasionally, a few larger pebbles, properly belong to the yellow surface loam, and usually differ, lithologically, from those of the Orange Sand. 19. As for the material of the pebbles themselves, it is almost exclusively 2. 120, 21] PEBBLE BEDS OF ORANGE Sand. 13 siliceous; hard aluminous sandstone, or siliceous claystone, is occasionally found, but by far the prevalent material is the several kinds of amorphous quartz-Chert, Hornstone, and Jasper, with numerous varieties of the rarer rocks of the same class-Agate, Chalcedony, Cornelian, Sardonyx, Lydian Stone, etc., of which very beautiful specimens have been obtained in the State. Gray and yellowish Siliceous Sandstone is very common; and pebbles of Rock Crystal, as well as of white, crystalline quartz rock or Quartzite, are common in some localities, and occasionally found throughout the pebble deposit. Porphyry, and trappean rocks, are of rare occurrence, though not entirely absent. There is a marked difference of character, however, between the pebbles of the eastern, and of the western pebble region. In the former (at least in the valley of the upper Tom- bigbee,) Chert and Hornstene, with siliceous and aluminous sandstone, and some quartzite, are almost exclusively present; while in the western belt, along the Mississippi, a great variety of rocks, as above mentioned, is generally found. In both regions, however, fossils of the ancient, palæozoic formations are of frequent occurrence in the pebbles themselves. (See below ¶ 29 & ff.) 20. The size and form of these pebbles, as may be supposed, are extremely variable, from small gravel to the coarsest shingle, and from the perfect egg shape, ellipsoid and dise, to irregular fragments with rounded angles only. The quartzite, rock crystal, lydite, jasper and trappean pebbles are almost always much worn and of regular shapes, and usually small, while those of the fossili- ferous chert, hornstone and sandstone are often large, very irregular, and comparatively little worm. I have found a Cyathophyllum forming a pebble by itself, in which projecting radii were still extant, though somewhat rounded; and on the blocks of crinoidal columns, the characteristic figures may sometimes be seen almost unharmed. 21. The average size of the pebbles might be stated as being between that of a pigeons and a large hens, or turkeys egg. But the maximum size found is very considerable, and somewhat puzzling to account for, on the supposition of transportation by water alone. Besides, angular blocks of considerable size, have been known to occur, one of which, a white, perfectly rough block of quartzite weighing about 150 pounds, (found in N. Lafayette county, in a hickory valley on S. 24, T. 7, R. 3, W., by A. H. Pegues, Esq.,) is now in the collection at Oxford. Rounded blocks of ferruginous quartz, a hundred pounds and more in weight, have been found on the bluffs bordering on the lower Yazoo, (Harper.) I myself have found, in Tippah county, T. 5, R. 1, E., (where pebbles are not otherwise prevalent,) perfectly rounded pebbles of white quartzite, weighing up to twelve pounds, at least; and similar pebbles, even of larger size, are said to be common in that region. In Claiborne county, at Rocky Springs, I found a rounded block of yellowish siliceous sandstone of great hardness, weighing 64 pounds, and containing two links of a calamite; the rock differs decidedly from any sandstone known to me in Mississippi. Scratches have not, however, in any instance been found on their surface. 14 [¶22, 23, 24 GEOLOGICAL REPORT. 22. Usually, the pebbles occur in loose beds, commingled with sand, clay, or clayey sand; and in its western belt, along the Mississippi River, it is only very locally that they are at times found cemented, to a certain extent, by a ferruginous sandy cement, where an impervious vein traverses the stratum. In eastern Tishomingo county, however, they are very commonly cemented into a pretty firm conglomerate or puddingstone, by a cement of brown hematite, with very little sand. This conglomerate forms some high hills and ridges, and precipitous cliffs, on the territory of the Carboniferous formation in the county mentioned; and it is occasionally seen, through eastern Itawamba, and Monroe counties, as far south as Buttahatchie Creek. A more detailed account of the peculiar features of the Orange Sand formation in eastern Tishomingo, will be given below. (¶ 30 & ff.) 23. A singular rock belonging to this formation, and much resembling a true puddingstone, is found in a few localities in W. Tippah and E. Lafayette counties, on the territory of the Lignitic Tertiary. (e. g. S. 1, T. 5, R. 2, E. Tippah county; S. 33, T. 9, R. 1, W., Lafayette county.) It consists of a ferruginous and somewhat sandy cement, in which are imbedded numerous rounded concretions of a pisolithic structure, formed of concentric layers of a siliceous material, more or less ferruginous, and in some almost white; the largest being about 3/4 inch in diameter. 24. Clay Deposits.-Clay has been repeatedly mentioned as occurring within the Orange Sand formation; and although this material does not usually form heavy deposits, and cannot therefore vie with the others mentioned as to quantity, the great frequency of its occurrence, as well as its practical usefulness in numerous cases, renders it second in importance to none. The clay deposits of the Orange Sand are most common in (though by no means confined to) its lower stages; they rarely extend over large areas, save that at times, their layers, often incontinuous, intervening between adjacent strata of sand, may be traced, under favorable circumstances, with little change of either quality or quantity, for a mile or two. As a general thing, the larger masses of clays appear in basin-shaped, lenticular, or nodular masses, when occur- ring independently of other formations; the only notable exception to this rule, known to me, are the white and red clays of the carboniferous territory, in Tishomingo, which form strata extend- ing over considerable areas, and of unusual thickness. T25, 26] CLAY OF THE ORANGE SAND. 15 25. Very commonly, however, clay deposits occur near to the contacts of the Orange Sand with underlying clayey formations; and then the shape of the mass conforms, more or less, to the surface of the latter; though stratified horizontally. In these cases, the Orange Sand clay is oftentimes but little different from that of the more ancient formation from which it has obviously been derived, though redeposited in evident stratigraphical and lithological connection with the Orange Sand. 26. The general character of the clays properly belonging to this formation, is that of meagre pipeclays of great plasticity, requiring but little seasoning before they are worked; wherein they differ essentially from the fat, intractable clays of some of the underlying formations. Like all other materials of the Orange Sand, they are remarkably poor in lime and magnesia. As to their color, it is a singular fact that but few of them are strongly ferruginous. Grayish yellow, cream-color, white, and purple, are the usual tints; the latter rarely occurs throughout large masses, but very frequently in layers and stripes within masses of other colors; and its various shades, contrasted with the other hues mentioned and an occasional bright yellow, crimson, or blue stripe or dot, give rise to very unique and beautiful colorings. The red ochre tint of the red clay deposit found in Tishomingo, is rather unusual. A great variety of colors is sometimes met with in the small nodular masses which frequently occur in the southern part of the State, mostly associated with gravel deposits, and themselves apparently representing pebbles-since the stratification lines which they often exhibit, appear to be entirely independent of those of the Orange Sand deposits. The clay which composes these nodules cannot, however, be identified with that of any of the older formations of the State, unless indeed, we imagine them to have been deprived of their carbonaceous coloring matter, and their protoxide of iron transformed into peroxide--a kind of metamorphosis which, as will be seen, appears to be common, with some others, in the Orange Sand formation. It is indeed, but very rarely that we find in this formation, under ordinary circum stances, anything that allows of farther oxidation by atmospheric influences. I know but one instance in which a very dark colored clay, containing a large amount of oxidizable matter occurs within the Orange Sand proper, though at a great depth below the surface; and even in this case, the oxidation has penetrated several inches into the mass, which is very dense. 16 [127 GEOLOGICAL REPORT. 27. The instance in question occurs in the deep cut on the Memphis and Charleston Railroad, about 4 miles east of Pocahontas Station, in Tennessee, but deserves description here on account of its importance in a geological point of view. [No. 1.] Z s s s. Loose yellow sand. 777. Indurate ledges (ferruginous sandstone.) C. Mass of black clay The cut in question (Diagram No. 1.) is ninety feet deep, through a ridge dividing the Tuscumbia river from one of its eastern confluents. The main body of the ridge consists of yellow and orange colored sands (with occasional layers of pipeclay) in which, fortunately for the permanence of the excavation, there are several successive indurate ledges, (777,) ferruginized, which serve as shelves to support the caving sand. On the western half of the cut, there lies imbedded in the sand, and surrounded by it as far as visible, a basin shaped mass of black, tenacious, fetid clay, (c,) with scarcely a trace of stratification, At the center of the basin, about 15 feet of this mass are visible above the road- bed; its total thickness, as indicated by the visible part of the outline, would be about twenty feet, with a maximum length of 75 yards. The clay contains, diffused throughout the mass, minute crystals of iron pyrites and a few very indistinct, carbonized remains of plants, apparently grasses, and perhaps, willows. On the outside and upper surface of the mass, however, there is a shell as it were, of cream colored clay, one to four inches in thickness; evidently the same as the rest, and passing into it by a shaded band of transition. The same cream color is assumed by the black clay when it is burnt, and in the present case it is evidently the result of oxidation from the outside. [Similar cream colored clays are very common elsewhere in the Orange Sand formation.] The stratification lines of the surrounding sands, which elsewhere exhibit the usual wavy appearance, show a decided inflection downwards, and the layers thin out as they approach the mass, so as to conform, to a considerable extent, to its external shape. Special descriptions of some of the more notable deposits of clays in the Orange Sands will be found under the head of the Useful Materials of this formation. T29, 30] AGE OF THE ORANGE SAND. 17 FOSSILS OF THE ORANGE SAND FORMATION; ITS GEOLOGICAL AGE. Extensive and minute examination, which I have bestowed on the various stages and facies of the Orange Sand formation of Mississippi have failed to satisfy me that it contains any fossils whatsoever characteristic of itself. It usually contains the fossils, as well as the materials, more or less modified, of the underlying* formations; and although silicified wood is of very common occurrence in the Orange Sand strata generally, the circumstance of its occurrence with any degree of frequency being either confined to the territory of the lignitic formations, or to water-worn fragments, seems to indicate that this fossil, also, is derived from more ancient deposits and owes its presence within the Orange Sand to the destruction of the former by denudation. It is true that the coarse sands which compose the main mass of the formation, are a material unfavora- ble to the preservation of fossils; but the fine sands, as well as the impalpable clays which so frequently occur, could not but have preserved traces at least of the proper fossils of the Orange Sand period, had any such existed. The black clay deposit on the Memphis and Charleston Railroad, previously described, is the only instance in which, to my knowledge, there is strong evidence of fossils (leaves) being found within the Orange Sand in their original place. The shape of this mass renders it difficult to believe it anything else than a deposit formed in loco; but we shall see that even thus, it might be supposed to belong to the underlying lignitic tertiary, and not properly to the Orange Sand. 29. Devonian and Silurian fossils in the Orange Sand.-Corals are the most commonly occurring among the pebbles of the western belt (¶ 17); e. g. Lithostrothion basaltiforme, Calamopora, Astræa, Millepora, Catenipora, Chatetes, Cyathophyllum, Petraia. Next to these, stems of Cyathocrinus and other Crinoidea are most abundant. I have also found an Atrypa, and a fragment of a Trilobite. 30. Carboniferous fossils in the Orange Sand.-The pebble beds on the territory of the carboniferous formation, in Tishomingo county, consist chieflyof chert, hornstone and sandstone, containing fossils identical with those of the underlying carboniferous strata --Cyathophyllum, Fenestella, Gorgonia, Pentremites, Productus, *Not always of those underlying in the same locality; but commonly, at least, at no great distance. R-2 18 [931, 32 GEOLOGICAL REPORT. Spirifer, Terebratula--and the pebble strata themselves are fre- quently underlaid by a somewhat cellular breccia of angular frag- ments of the same materials, which intervene between the pebble strata and the unchanged carboniferous rocks. This breccia, which is usually cemented by a ferruginous material, sometimes contains abundance of fossils; though the hornstone in mass is poor in these, and they are generally very poorly preserved; oftentimes, indeed, it appears as though the stratum had only been thoroughly shattered by some cause without removing the fragments much from their natural position, so that those belonging together have been re-cemented in loco; the ferruginous cement, at the same time, has penetrated the hornstone to the depth of 1-10 to 1-8 of au inch, so as to imbue completely the smaller fragments. This hornstone is ex- ceedingly brittle, so as to fly to pieces readily whenever the surface even of a large block is broken by the hammer. From semi-transparent, flinty varieties, this rock sometimes passes through all gradations into an opaque and soft stone, and finally into white, pulverulent silex, which forms a stratum of about 10 feet thickness in the neighborhood of Eastport, Tishomingo county. The soft mass is at times traversed by harder layers, or bands of hornstone; both in the latter and in the pulverulent mass, carboniferous fossils are found, though sparingly. 31. On S. 16, T. 2 R. 10 E., near Scruggs' Bridge, in the same county, I observed in a well, overlying the carboniferous limestone, ledges of this hornstone, two to six inches in thickness, alternating with layers of about the same thickness, composed of both pebbles and angular fragments of hornstone, imbedded in a pale bluish clay. It is difficult indeed, under these circumstances, to determine definitely to which formation the breccia and brittle hornstone strata properly belong. While in some respects they closely resemble the rocks of the siliceous stage of the Carboniferous, the intimate connection of a part of the hornstone at least, with the pebble strata, seems equally obvious; and the cement of the breccia at least is most probably of Orange Sand age. Here, as elsewhere, the pebbles are totally destitute of calcareous materials, which the Orange Sand appears to have in all cases metamorphosed, or rather pseudomorphosed, by means of siliceous or ferruginous solutions; but we find frequently in the pebbles, an oolitic structure which belongs to the carboniferous limestones of the region; the material being, however, entirely siliceous. Might not the same solution which effected this pseudomorphosis, have been instrumental in forming the brittle hornstone and breccia? 32. I ought to mention in this connection, the singular change, resembling decay, which purely siliceous pebbles of various kinds sometimes appear to have undergone in particular regions. The most striking example I have seen occurs in Simpson county, near Cokesville or Cokes School House, N. E. 1-4 T 10 R 17 W. Wells here are of great depth-100 feet-and a few feet beneath the surface, there appear beds of (generally small) pebbles mixed with yellow sand. The 933] DECAYED PEBBLES-CRETACEOUS FOSSILS. 19 pebble bed is of inconsiderable thickness, beneath it lie beds of yellow and pink sands, down to the water level. The pebbles thrown out of wells and gravel pits in this region contain a great variety of rocks in the fresh state; among these, hornstone of various tints, agate, chalcedony, lydite with white veins, rock crystal, and hard standstone ; in the former three, impressions of paleozoic fossils, and chalcedonized corals, are common; also oolitic pebbles of the same materials. Mixed with these fresh pebbles there are others consisting in the main of a white or yellowish, light, porous, siliceous mass, whose particles appear crystalline under the microscope; which adheres to the tongue, is often readily broken by hand, yet bears most unequivocally the several characteristics of the rocks constituting the fresh pebbles, (except the rock crystal). The structure of the agates, with their crinoidal columns, the chalcedonized corals, the oolitic pebbles are there; so are the veined lydite and hornstone, with the substance of the vein usually unchanged; so that we sometimes find vein skeletons of such pebbles, from which the soft silica has been removed by water. Nor are the two extreme conditions alone found; every degree of transition from fresh agate to the amorphous mass, may be traced; some pebbles are changed outside, but fresh in the interior ; in others, an incipient dullness of the surface announces the commencement of the process. Whatsoever may be the nature of the latter, it is evident that one of its results must have been the formation of a siliceous solution, which percolated down- wards. It appears therefore that in these pebbles, we see the product of the beginning of the process of which the silicified wood marks the end. I have not ascertained what is the particular stratigraphical relation of these decayed pebbles to those in a fresh condition. The only peculiarity of the country which might have some bearing on these phenomana, is the great pervi- ousness of the soil, in consequence of which, most of the hollows are without a water channel, and semi-cylindric in shape.-I have observed similar pebbles in other localities, though not often with equal frequency. 33. Cretaceous Fossils in the Orange Sand.-I have found well defined cretaceous fossils in three distinct localities; in all of these they occur in ferruginous sandrock on the summits of high ridges; the calcareous material of which the corresponding cretaceous strata consist, has been changed into a ferruginous sandstone not differing, apparently, from that ordinarily found, but in all cases of a conglomeratic character, and full of rosettes and irregular galls of yellow ochre and brown hematite. One of the localities mentioned is near Harris' Cut, on the Memphis and Charles- ton Railroad, S. 3, T. 3, R. 9, E., Tishomingo county. (T 27.) Fossils are quite numerous, but badly preserved. Those identified are the following: Cucullaea capaх, Сон. Gervillia ensiformis, CoN. Dosinia densata, CON? Cardium Tippanum, Con! .20 [¶34, 35 GEOLOGICAL REPORT. · Cardium sp., (allied to the former, and also found near Ripley.) Trigonia n. sp. (probably identical with a species from Chunenugga Ridge in the collection of the Alabama Survey). ¨Inoceramus sp. Another locality is in the Hatchie hills, S. 20, T. 5, R. 5 E., S. E. Tippah county. Fossils few; those recognized are : Ammonites placenta ! Trigonia thoracica ! A third locality is at Mr. Sidal's, S. 18, T. R. 5 E., Tippah county. Fossils few and indistinct; Trigonia! and a Cardità? were recognized. It will be observed by a glance at the map, that all these localities lie to the eastward of the present region of occurrence of the group of fossils represented by the above, viz: the Ripley Group, or Upper Cretaceous. 34. Tertiary Fossils in the Orange Sand.-As yet I have not found any of the fossils of the marine tertiary in the strata of this formation. There cannot. however, be any doubt that a great part, if not all the silicified wood so commonly found in the Orange Sand strata, is derived from the several lignitic stages of the tertiary. Trunks of this wood may be found im' edded partly in the lignitic strata, partly in the adjacent Orange Sand. The most common place of occurrence of silicified wood, is at the planes of contact »of the strata of the two formations, where we find not only entire trunks, but also layers consisting entirely of comminuted fragments. Within the lignitic strata themselves, the wood is commonly lignitized, except sometimes where these strata themselves are composed of sand. That portion of it which is buried in the lignite strata, is generally tinged black, in part at least, with carbon*; while that which projects into, or is found exclusively in the Orange Sand, is white or gray throughout, unless the trunk be a very large one. 35. The vegetable structure of the wood is generally very well preserved, and microscopic examination will, no doubt, enable us to determine the species (which are very numerous), and also to determine definitely whether or not the species found in the Orange Sand are peculiar, or identical with those of the underlying formations. Meanwhile, the only botanical evidence on the subject is this, that while no tree Palms have as yet been found in either the Lignitic, or Orange Sand strata of North Mississippi, they, as well as the remains o Endogens generally, are common in both the Upper Lignitic and the Orange Sand strata of South Mississippi. The remains of dicotyledonous trees, and especially of Cupuliferæ,† are common to both districts; coniferous wood, *Cross sections of such partiall. blackened wood, possessing a round, jet black nucleus, have been claimed as being "Persimmon wood." +Most of the woods found are popularly referred to Hickories, Oaks and Beeches, to the wood of which the majority of specimens bear a strong resemblance. 937, 38] SILICIFIED WOOD. 21 however, I have observed with frequency chiefly in the southern division, both in the Orange Sand and the underlying lignitic strata. 36. It has been stated before, that silicified wood occurs with greatest frequency near the planes of contact between the two formations, and is, therefore, most. readily accessible in those districts, where the Lignitic formations form the base, and the Orange Sand the upper portion of the hills. I may add, that its frequency of occurrence in the Orange Sand is also dependent upon that of similar organic remains in the underlying lignitic strata. It is, therefore, most abundant where beds of lignite, and clays filled with lignitized trunks and leaves, are most common near the surface-i. e. in W. Tippah, E. Marshall, Lafayette, Calhoun, E. Yallobusha, Choctaw, Ocktibbeha, Winston and Neshoba counties. Whether or not the same is the case in Holmes and Yazoo counties, where lignite beds prevail, I have not learned; to the southward of these, however, in Hinds, and Claiborne, southward of the lignite beds on the Big Black, silicified wood is: very common. It is found more or less, however, in most districts where the Orange Sand prevails in force, and down even to the Sea Coast (Prof. Wailes collected specimens in Hancock county, and another, picked up on the beach at West Pascagoula, has been presented by Mrs. McRae). It is very uncommon, however, on the territory occupied by the cretaceous formation; except near the western border, and on the territory of the Lower Cretaceous or Eutaw Group--the latter being also, a lignitic formation, though containing vegetable remains with far less frequency than does the lignitic tertiary. The only specimen found in Tishomingo county, where the Orange Sand is otherwise well developed, was picked up by myself, near Mr. Peden's Mill, on heads of Mackay's Creek, S. 9, T 5, R. 10, E., where outcrops of the lignitic cretaceous are abundant. Near Fulton, Itawamba county, silicified wood is also found. These, however, are the only localities in which I have met with this fossil E. of the Tombigbee, notwith- standing that, in Itawamba and Monroe counties, the Orange Sand formation is very largely developed, and one would look for its characteristic fossils there if anywhere. 37. It is true that although silicified wood occurs most frequently near to the surface of the lignitic formations, it is, nevertheless, sometimes found at a considerable elevation above the latter, on the Orange Sand ridges. If we seek for a reconciliation of this fact with the supposition of its derivation from the lignitic strata, we must ask the same question with reference to the cretaceous. fossils mentioned above, which were found on hilltops, more than a hundred feet above any cretaceous strata at present existing; and that too at a con- siderable distance from the region of occurrence of corresponding strata, now found to be composed of hard limestones and heavy clay marls. The same agency which was capable of performing this task of elevation and transporta- tion, would have found little difficulty in doing likewise with semi-lignitize di wood, of a much less specific gravity. 38. But we have more tangible proofs of the disposition of the Orange Sandi to appropriate to itself the characteristics of other formations, in the insensib les transitions which we frequently find between the materials of the Orange Sand 22 GEOLOGICAL REPORT. [T39 [No. 2.] and those of underlying or adjacent forma- tions; which plainly prove that the current which first denuded the more ancient forma- tions and then deposited the Orange Sand, sometimes re-deposited the materials first removed, without effecting any great change in their lithological character, or removing them to any great distance from their original place. I have stated above (25), that where the Orange Sand is in contact with clayey strata of underlying formations, clays closely resem- bling those of the latter are often found unequivocally connected, by stratification, with the Orange Sand deposits. This is so commonly true, that in North Mississippi, where I have most closely observed the formation, the occurrence of these bluish clays is taken as a sign of the approach to the surface of the "black dirt," warning the well- digger not to proceed any further, for fear of spoiling the quality of his water by contact with the fetid bituminous clays of the Ligni- tic. Similarly, in Tishomingo county, it is often impossible to determine within many feet, the line between the greenish sands of the lower Middle Cretaceous, and the overlying Orange Sand; and in several cuts on the Memphis and Charleston R. R., it is clearly shown that cretaceous sands, unchanged save in their stratification, have been redeposited on the previously denuded surface of older strata; retaining in part at least, their lime, and also their characteristic fossils. 39. Diagram No. 2, representing a cut on Harris' contract, S. 3 T. 3 R. 9 E., will serve to exhibit these phenomena, which are repeat- ed in many other cuts in the same region. It will be observed that the undisturbed cretaceous material (a dark-colored, very compact sandy clay), which has evidently been subject to denudation, is overlaid by variegated sand (similar to that which, further W., forms the undisturbed strata of the Cretaceous), the stratification of which con- ravine between the hills bb; brown sandy loam lined with a a, black sandy clay, horizontally stratified. bb, variegated sand with nodules containing cretaceous fossils. fragments of ferruginous sandstone. ancient 940, 41] EFFECTS OF DENUDATION-CHEMICAL CHANGES. 23. forms, in some measure, to the surface of the denuded mass. This sand is slightly calcareous, and contains cretaceous fossils, which are best preserved in the mass of the concretionary nodules appearing in the upper portions of the deposit -indurated by a cement partly ferruginous, partly calcareous. The ancient valley, the outline of which is marked by detrital fragments of slaty ferruginous sandstone, adds interest to this section. Immediately back of this cut rises a high Orange Sand ridge, on the summit of which cretaceous fossils are found in the ferruginous sand rock (¶11). In the case before us, as in numerous other instances seen in Tishomingo county, it becomes optional with the observer to which of the two adjacent formations he chooses to consider the material in question as belonging. 40. It is perhaps in an analogous manner, that the anomalous basin-shaped mass of black clay in the Orange Sand cut near Pocahontas (¶27) may meet its explanation. If originally existing in sands belonging to the lignitic tertiary (on whose territory we see similar phenomena), it might have resisted denuda- tion by virtue of its extreme tenacity, while the adjacent sands might have been partially removed, and their place filled with Orange Sand deposits. 41. Chemical ffects on other formations.-We have thus far noticed the changes which the materials of the more ancient formations undergo when removed by the denuding action which characterizes the Orange Sand period. But the chemical changes effected on the upper layers of these formations, even when remain- ing in place, are not less conspicuous at times. The effects produced are referrible, in general, to one or more of three agents, viz: Lixiviation and Oxidation, by the joint action of carbonic acid, oxygen and water; the action of siliceous solutions; and that of ferruginous solutions. • Instances of all of these effects within the Orange Sand formation have already been mentioned. The effects of oxidation may sometimes be noticed at the planes of contact of the Orange Sand with the black lignitic strata, which have been bleached on their surface; but more usually this influence has been accompanied or succeeded by one of the others, and most frequently, by the ferruginizing action which has already been cited as one of the prominent features, especially of the upper stages of the formation. Thus in N. Tippah county, and also occasionally in the more southerly portion of the northern Lignitic region, we find the uppermost layers of the latter formation (there composed chiefly of gray or black clays) transformed into red shales of consider- able hardness—an excellent material for the preservation of organic remains, and in some instances very rich in fossil leaves. One of these localities (Hurley's Schoolhouse, at the heads of Ocklimita Creek (170), has furnished the best collection of fossil leaves which I have as yet obtained from the Northern Lignitic formation. Other instances of the occurrence of similar shales, will be found mentioned under the head of the latter formation. 24 [¶42, 43, 44 GEOLOGICAL REPORT. 42. A much more common effect of the contact of the Orange Sand with the Lignitic clays, is the appearance, on the line of contact, of variously shaped nodules of aluminous brown iron ore, of various degrees of purity not only in different localities, but within one and the same nodule. These nodules are so common in the eastern portion of the Northern Lignitic, from Tippah and E. Marshall to Lauderdale county, that they become the habitual surface indication of that formation, and are, therefore, very frequently found associated with silicified wood. Their usual shape is that of a flattened ellipsoid, and their size ranges from that of a marble to a diameter of 23, and even three feet in one direction; when of large size, they are ordinarily very much flattened as well as lengthened. Being generally imbedded in clay, their outside is usually quite smooth; internally, they consist of concentric layers of different degrees of purity, which sometimes inclose a core of pure brown hematite, but more commonly a maze of cellular cavities, often resembling a honeycomb, either empty or filled with yellow ochre more or less pure. In the "Hills of the Flatwoods Region" (see Agricultural Report) they may frequently be seen on the hillsides, mingled with the common ferruginous sandstone (from the hilltops), from which, however, they are readily distinguished by their peculiar structure, and the fineness of their material. They serve as a very convenient mark of the level at which the impervious clays occur, and to which, therefore, the wells on the ridges will ordinarily require to be sunk. 43. Sometimes, though on the whole but rarely, we find brown hematite taking the place of silex in the petrification of wood; and fragments of wood thus ferruginized (of the same origin, no doubt, as the silicified wood) are occasionally imbedded in the ferruginous sandstone of the hilltops. The vegetable structure is in these cases but poorly preserved, so as to render it difficult, if not impossible, to identify the species. + 44. The frequent occurrence of silicified wood, under the circumstances before discussed, as well as the hard siliceous sandstones previously mentioned (¶ 15), show that a liberal supply of soluble silex, has, in times past, been active in many portions of the formation. That the hard and flinty trunks now found were once in a soft or gelatinous condition, may be inferred from the fact that few large trunks have remained entire, or if so, are solid inside. Usually, we find them split up in billets, and when a round trunk occurs, a cross section generally shows numerous crevices running out radially from a hollow centre- such as would result from contraction in drying. The silicified mass itself exhibits all the several varieties of amorphous quartz, from semi-transparent ¶45, 46] SILICIFICATION-QUARTZ CRYSTALS. 25 chalcedony (the usual material of silicified palm wood), through white hornstone to a soft fibrous mass resembling asbestos, which furnishes elegant objects for, the microscope with the least possible trouble-the cells being thus separated, though perfectly preserved. The asbestiform varieties are most frequent in S. Hinds county, near the Mississippi Springs; soft grayish hornstone is the common material elsewhere. 45. Not unfrequently, cavities occurring inside of silicified trunks, are found studded with small, but very perfect crystals of smoky quartz. Some beautiful specimens of this kind, from a large trunk, and with crystals of unusual size (% to ½ inch in length) found on Lime Kiln Creek, have lately been presented by the Rev. Mr. E. Fontaine, of Battle Springs, Hinds county. In this case, the external form of the trunk, as well as the outlines of its woody structure, are still distinctly recognizable on portions of the specimen, though crystallization has destroyed the detail. Crystals precisely similar to those just mentioned, but attached to a siliceous mass without any apparent structure, were found in S. Ocktibbeha county, a few miles S. of Whitefield, on S. 21, T. 17, R. 12 E., near Mr. Dodson's place; and the unusual character of, the specimens induced me to prcceed to the spot for a special examination. The deposit is found on a low ridge, and has been traced for a mile and a half in a S. W. and S. direction, while (being confined to this single ridge) its width is inconsiderable-not more, perhaps, than twenty yards. It is a stratum 12 to 18 inches thick (lying 2 to 3 feet below the nearly level surface), of a white siliceous rock, both the upper and lower surface of which is studded with crystals of smoky quartz, ¼ to ½ inch in length. The solid portions of the rock so closely resemble silicified wood, that an isolated fragment would be unhesitatingly referred to such origin; it forms, however, as has been said, a level stratum of some extent, and there is very little curvature of the layers to be traced, even in large blocks. In the interior of the mass, there are many irregular drusy cavities, lined with numerous successive bands of siliceous mass and also studded with radiating crystals; some of the solid portions themselves, in fact, are mére conglomerates of crystals, of a bluish tint. Their form is the hexagonal prism, in which both sets of planes are very evenly developed, while usually the terminal rhombohedrons are very unequally developed, so that one of them is often entirely suppressed. The sand overlying this deposit bears all the characters of the Orange Sand formation; underlying it, however, there are sharp sands containing large scales of mica, such as are but rarely seen among the Orange Sand materials, and greatly resembling those accompanying the lignitic strata of the region. The nature of the deposit itself, however, can leave little doubt that it is nothing more than a bed of lignite which has undergone a process similar to that which has effected the silicification of the uncompressed trunks commonly occurring. Fragments of silicified wood are very common in the same neighborhood; and lignite beds are abundant in the adjoining portions of Ocktibbeha and Winston. 46. I ought to mention, in connection with the subject of silicification, the peculiar structure exhibited at times by certain cherty varieties of the hard 26 [947 GEOLOGICAL REPORT. siliceous sandstone, which has been mentioned as taking the place, occasionally, of the ferruginous sandstone. Where thin ledges (6 to 8 inches) of this rock occur, the surfaces exposed to the weather sometimes show a great number of rounded holes, like gimlet-holes, penetrating the rock at right angles to the strati- fication line; which is also the direction in which it most readily cleaves. On breaking such blocks we find in the interior of the mass numerous crevices, which I cannot describe better than as resembling those left in burnt brick, when straw or chaff has been used in their manufacture. These crevices are almost always lined with some ferruginous matter, and whenever they reach the surface, the action of the atmosphere soon widens and rounds them. In some instances too I have met with blocks in which these crevices were singularly contorted, in such a manner as would result if green grass leaves were kneaded up with plastic clay, and then burnt out. Whether or not these crevices represent organic remains, it is difficult to decide; at times it may be thought that the entire form of a blade of grass has been traced, but when followed up, instead of terminating, it may open out into a wide, irregular space, lined also with ferruginous matter, and from which, perhaps, similar, but utterly irregular fisures radiate in several directions. It is hardly less difficult to construe them into fucoids. 47. The characteristics of the Orange Sand formation in Mis- sissippi, as given above, leave little doubt as to the circumstances under which it has been formed. The character of the surface upon which it rests, its own irregular stratification, and the dependence, to a great extent, of the nature of its materials upon that of the underlying formations, proves beyond question that its deposition, preceded and accompanied by extensive denudations, has taken place in flowing water, the effect of whose waves, eddies and countercurrents is plainly recognizable in numerous profiles. Nor can there be any doubt that the general direction of the current was from north to south, although locally changed or directed by the pre-existing inequalities of the surface. The arrangement of the pebble-beds into belts (running, in Mississippi, approximately N. and S.) proves that currents of greater velocity, capable of transporting these coarse materials, existed there, coincident in the main with the channels of the great rivers at present existing-the Mississippi and Tombigbee; the connection of the latter channel with the former, having, it appears, been subsequently closed by the induration into puddingstones, and consequent resistance to denudation, of the pebble-beds of N. E. Mississippi and N. W. Alabama, thus throwing northward the T48, 49] DEPOSITION OF THE ORANGE SAND. 27 waters of the Hatchie, Tuscumbia, Big Bear, and other southern tributaries of the Tennessee River in Alabama. The Western Highland Rim of Tenneesee (see map accompanying the Geological Reconnoissance of Tennessee, by M. Safford, 1856) appears to have prevented the irruption of this current, to any great extent, into the Tennessee Valley and the Central Basin of Tennessee; the pebble beds as well as (in N. W. Alabama) heavy deposits of Orange Sand extend along the western and southern border of the Carboniferous region, between the Tombigbee and Warrior rivers, and eastwards to the Coosa; meeting, perhaps, still further east, the deposits brought down on the E. side of the Alleghanies, on . which the cities of Baltimore, Washington, Richmond and Peters- burg, Va., and Columbia, S. C., are situated.* 48. While the pebbles were deposited chiefly in these channels, where the velocity was great, the intervening space, cut up into numerous minor channels by denudation, retained the smaller gravel and sand, and also, where some protecting ridge afforded a chance for quiet subsidence, received deposits of clayey materials, which naturally would be as limited as was the area of the "slack water" itself. It is easy to understand how under such circumstances, when the currents which caused the first, denudations began to slacken, the materials of older formations might be removed and then re-deposited with little change, at no great distance from their original place, and subsequently covered over with fresh masses brought from a distance. At the end of the period, the violent currents having subsided, the pebble deposits themselves were in many cases covered over by sands similar to those which, in other regions, compose the entire formation. Still later, the processes of oxidation, lixiviation, silicification and ferrugination (all of which are probably still in progress) commenced, and subsequently still (apparently even later than the deposition of the Bluff formation), great denudations again ensued, partly contemporaneous with, partly subsequent to, the deposition of the yellow surface loam—one of the latest formations, apparently, preceding our present era. 49. However different may be the geological detail of the Orange Sand formation from that of the Northern Drift deposits, the evident anology of their lithological composition and general history would lead us to suppose the two formations to be genetically related. In both cases, immense volumes of water destitute, or nearly so, of organic life, rushed southward, bearing with *See Second Report on the Geology of Alabama, by M. Tuomey, ed. J. W. Mallet. A few months prior to the death of the lamented Tuomey, during a visit at Tuscaloosa, I compared notes with him on the subject of this formation, the extensive and c aracteristic development of which in Mississippi and N. W. Alabama, was unknown to him at the time of writing the portion of his Report relating to the same. As far as com arable, the observations, and c nclusios arriv. d at by each of us inde- pendently, t llied perfectly, except with reference to the occurrence of Mast don bones IN the formation, as mentioned by him (p. 147 of the IId Report). He a mitted, however. that the bones in question might well be referable to the Bluff formation, the existence of which on the Lower Tom- bigbee, he had but shortly before as ertained. is suggestion regarding the nature a d origin of the waters which deposited the Ora ge Sand formation, (Ibid p. 146,) appear to be confirmed by all the additional observations subsequently made by myself. 28 T50, 51 GEOLOGICAL REPORT. them the fragments and detritus of the older formations. Both formations immediately underlie the Bluff or Loess formation.`` Whether or not the Orange Sand deposits contain any materials necessarily derived from a high northern latitude, still remains to be determined, for thus far, the materials for comparison are imperfect on both sides. By far the greater mass of the pebbles occurring in Mississippi appear to be referable to sources lying S. of the Ohio river, on either side of the Mississippi, while the rocks most common in the drift of Illinois-granite, mica-schist and metamorphic sand- stone, are either very rare or (like granite) entirely wanting. It will be inter- esting to inquire, whether or not the rocks composing the pebble-beds further north, in Tennessee, Kentucky, Arkansas and Missouri, are derived from local- ities correspondingly remote in that direction. It must be remembered, however, that the present outcrops of these formations may not nearly represent the localities of the broken-down strata which furnished the rocks, especially when the dips are slight, as is generally the case in the southern portion of the more immediate valley of the Mississippi. 50. While therefore the materials composing the Orange Sand formation may be far from identical with those found in the Northern Drift, we may neverthe- less suppose the two formations to have been nearly or quite contemporaneous, and caused by the same flood ofice-water, which in its course denuded the older strata, carrying their materials southward from their original place. Whether the large angular boulders, of which a few have been found in Mississippi, can be supposed to owe their transportation to some erratic ice-floe of unusual thickness, may be an open question, at least until the region intervening between the characteristic Orange Sand and Northern Drift (in Missouri for instance) shall have received a detailed examination. Even at the present time, however, in severe winters, ice-floes are seen in the Mississippi River below Vicksburg, and there seems to be no valid objection to the supposition that the same might have happened during the drift period, even if the climate should have been warmer; since the enormous thickness of arctic ice-floes would readily carry them a few degrees further south than could be expected of the winter ice of the Mississippi River. 51. The relations mentioned by Tuomey (Second Report on the Geology of Alabama, p. 146) as existing between the shore of the tertiary sea and the region of occurrence of the southern drift on the Atlantic slope, are not so clearly recognizable in Mississippi and Alabama-owing perhaps to the slight development of the later marine tertiary, and the proximity to the great outlets of the continental waters. Not only do the deposits of the latter hide, to a great extent, those immediately preceding the drift period, but the latter may have been partially removed and destroyed by the denudations accompanying that epoch. Elevated ridges of deposits unequivocally belonging to the Orange Sand formation extend to within a few miles of the Gulf Coast in several instances; although more frequently, these ridges are subterranean at the present time, the valleys between them being filled with sands exhibiting the lines of ¶52] SEA-COAST SANDS. 29 desposition usually observed in the sea beach formations; which now from the surface, so that the presence of the Orange Sand ridges is often demonstrated only by the phenomena observed in wells. [No. 3.] Stratification of sands in the Sea-Coast Counties. The stratification exem plified in the section is exhibited not only in profiles of the sands overlying the impervious black clays on the "wet meadow" plains adjoining the coast, but also further inland, in the valleys; in that of the Pascagoula, for instance, as high up as Buckatunna Creek, Wayne county.— These valleys therefore originally formed inlets or fiords, which in the gradual upheaval of the continent were transformed into rivers, while the gradually retiring surf of the beach left behind everywhere the traces of its action, in the peculiar stratification of the sand. 52. I cannot see the validity of the objection urged by Tuomey himself (Second Report, p. 146 and 147) against his supposition, that the accumulation of the southern drift in belts parallel to the shores of the tertiary sea was caused by the checking of the velocity of the drift currents as they entered the sea. The very fact of currents conveying great volumes of ice-cold fresh water, coming from the land, would naturally cause all living creatures to retire seaward as early as convenient, and since the deposits themselves were formed by those currents in their rear, there appears to be nothing surprising in the fact that they do not contain any marine fossils. In a shallow sea, whose water would be very perceptibly freshened by such an enormous influx, even the influence of the differences of specific gravity might be reduced to a very small item by the balancing influence of differences of temperature, acting in the opposite direc- tion; thus rendering unnecessary the assumption of a temporary redepression of the land as suggested by Tuomey. That the gradual upheaving process was continued up to a late date, and that currents more slow and deliberate than those which deposited the drift, covered the country for some time after the latter period, seems to be proved by the two superincumbent formations, the Bluff (327), and the Yellow Loam (332); since both the latter formations have availed themselves, in their deposition, of valleys previously excavated into the Orange Sand itself. 30 [T53, 54, 55 GEOLOGICAL REPORT. USEFUL MATERIALS OF THE ORANGE SAND FORMATION. 53. These consist of Sands, Gravel, Building Stones and Clays of various kinds. SANDS.--In regard to these little need be added to what has been said in the general description of the formation. (See ¶ 10 T ff.) They almost always contain more or less clay, which usually ёо is what imparts to them their various colors; even when the color is white. In most cases (except those of ochreous tints, when the single grains are often covered with a hard crust of iron rust), washing will readily separate the mass into white quartzose sand and clay of a corresponding color; and hence the sand washed out of this formation by the streams, is generally white, and thus far well adapted to the purposes of the mason and plasterer; although, whenever the sand of other formations is accessible, it is commonly preferred to that of the Orange Sand formation, on account of the rounded shape and smoothness of the grains, which characterizes the latter, and is less favorable to the cohesion of the mortar in which it is used. * The sand deposits of the Orange Sand formation cannot usually be relied on much for continuity, their stratification, as has been stated, being extremely whimsical. 54. GRAVEL OR SHINGLE.--Its regions of occurrence have been sufficiently defined for practical purposes, in a previous paragraph (178 ff.) In a State where stones are scarce, a liberal sup- ply of gravel for the improvement of streets and roads is likely to be appreciated. The deposits of the eastern border of the State do not as a general thing furnish gravel of equal purity with the beds bordering on the Mississippi, and are more frequently cemen- ted so as to form loose puddingstones; which are rarely of suffi- cient coherence to serve for building purposes, while yet too hard to be broken up for gravel. 55. Gems of some value and of great beauty may sometimes be picked up among the pebbles of agate, cornelian, chalcedony, sard and jasper, which are most abundant in the S. W. portion of the State; commonly, however, the larger agates are cellular, with sharp incurrent and excurrent angles, so as to greatly reduce their available mass. They may often be recognized, among the mass of pebbles, by this irregularity of external form. The ¶56] BUILDING STONES. 31 cornelians are usually of a 'flattened shape; while the several varieties of jasper show less disposition to assume any particular form, though oblong, rounded forms are perhaps the most common. Several forms of silicified corals, most frequently Astraea and Favosites (alias "petrified honeycomb"), which are not uncommon in the pebble beds, also form handsome gems when polished.- According to Prof. Wailes, the gravel bars in the Mississippi River, between Vicksburg and the Louisiana line, afford a fine opportunity for collecting these stones. Pebbles of limpid quartz or rock crystal are common in Wilkin- son county, and are found more or less throughout the pebble-beds of the Mississippi valley. They are rarely above the size of a pigeons egg, and usually much worn and well rounded. 56. BUILDING STONES.-AS has been mentioned, two kinds of rock occur in this formation. The most common is the dark brown ferruginous sandstone, often called "black rock," which caps the ridges of the Orange Sand formation-mostly in irregular and fanciful shapes, from which a gutter, or a spout for a spring may occasionally be selected; but sometimes also in solid ledges, of sufficient thickness to be valuable for building purposes. · This rock resists exposure to the weather very well; only the slaty varieties sometimes crumble in the course of time, while on massy blocks, no other effect is produced than that of whitening the sand-grains which project over the surface. It is not susceptible of polish, but well adapted to rough masonry; and stands well under water. It does not, however, resist fire well; the slaty varieties fly to pieces when heated; the massy rock, when heated slowly, can be made to stand, and in the "Pine Hills" is often used in fireplaces; ultimately, however, it also scales off and pulverizes. It resists sufficiently well when used in chimneys, where it is not exposed to a high temperature; and in Tippah, Tishomingo and Itawamba counties in particular, it has been extensively used for this purpose. As may be supposed from its mode of occurrence, its deposits are usually quite limited in extent, occupying only the high knolls and ridges; so that the supplying of a single plantation with chimneys may often require the exploitation of several deposits. And as moreover, it is not at all difficult to discover these deposits, which form the prominent objects in the landscape where they do 32 [¶57, 58 GEOLOGICAL REPORT. occur, I shall not attempt to specify many localities, but will only mention a few which are remarkable for being capable of furnishing large blocks of good quality, or regions in which the rock is unusually abundant. 57. On Tippah Creek, S. 7 T. 4 R. 2 E., Tippah county, near the crossing of the Hickory Flat and Salem road. Solid ledges 10 to 12 feet in thickness, and of considerable extent.-On the heads of Hatchie, Tallahatchie and Tombigbee, in T. 6 R. 4 E., Tippah county, on and near the Ripley and Fulton roads. In the sandy Pine Hills bordering on the E. Hatchie generally, the ferruginous sandstone is very abundant.-So also, on the high ridges in S. E. Itawamba, especially S. of Bull Mountain.-In S. E. Marshall and S. E. Lafayette counties-A heavy solid ledge occurs, on a level hilltop, a few miles W. of Water Valley, Yallabusha county:- Another, of considerable thickness and extent, on SS 29 and 30 T. 12 R. 2 W., Calhoun county, near Mr. Collins' place. The hills on the Otuckalofa, in N. Calhoun and N. E. Yallabusha, generally abound in this rock, so also do the high ridges of E. Carroll, N. Attala, and some portions of W. Choctaw. Usually the rock is hard and requires to be worked with the hammer and chisel; in some instances, however, we find it sufficiently soft to be cut into shape with an axe without dulling the same. Several small deposits of this kind exist near the heads of Potlockney and Otuckalofa Creeks; one on S. 16 T. 10 R. 2 W., Lafayette county. The cement here is somewhat aluminous, and small particles of white clay, which cause white streaks on a cut surface, are imbedded with the sand grains. The rock stands the weather well, and chimneys have been built of it. It is of a pale brown color inside, but where lichens have grown on the outside, it is red, sometimes to the depth of 1/4 of an inch. 58. The white siliceous sandstone of the Orange Sand formation (15) sometimes occurs in deposits sufficiently large to render it of importance. The chief localities of occurrence with which I am acqainted, are the following: In Tippah county, on S. 35 and 36, T. 4, R. 1 E., there is a considerable deposit, where large blocks can be obtained (¶ 15); the rock is a very hard-a translucent chert rather than a sand- stone, and from its resemblance to the Arkansas whetstone, it has been attempted to use it for the same purpose, which it answers tolerably well. A similar deposit, covering a few acres, exists on S. 19, T. 5, R. 2 E., near Mr. Milton Smith's; and another, quite small, on S. 1, T. 5, R. 1 E. Isolated blocks of it are frequently 959, 60] SILICEOUS SANDSTONE--CLAYS. 33 seen all over W. Tippah, and the adjoining portions of Marshall, Lafayette and Pontotoc. Near Rocky Ford, in the latter county, there is a large, continuous deposit of this rock, which strews the hillsides in large slabs, and blocks of considerable size-sometimes 10 feet in diameter. It is somewhat variable in its character- mostly hard, but workable; sometimes quite soft. It is found, N. of the Tallahatchie, between Catalfa and Tallaquamanola Creeks, for about 2 miles from the river; and southward of the same, around Rocky Ford, for about mile. Large quantities of fine building stone could be readily obtained here, by simply prying the blocks out of the soil. Powell's place, 5 miles from Good sized blocks for foun- 59. A. small deposit occurs at Mr. Oxford, on the Water Valley road. dations can be obtained here. Another locality, both of white and “black” sandstone exists, according to L. Harper, on S. 28, T. 8, R. 7 W., Panola county; and according to the same, a ledge of this rock, 4 feet in thickness and of great hardness, occurs in a hill on the Yockeney River, on S. 26, T. 10, R. 8 W. In Yallabusha county the white sandstone occurs in considerable force, at, and near Mr. Pearson's place, on SS. 3 and 4, T. 25, R. 6 E. Some of the rock here, also, is of excessive hardness, so as to be suitable only for rough masonry. Near Grenada this rock is found capping a hill. It is also found, in limited deposits, at several points in N. Calhoun; e. g. near Concord P. O.; and in considerable abundance, on S. 4, T. 25, R. 8 E. L N. Holmes and N. Attala are, probably, the region where the deposits of this rock are most abundant; on the ridges N. and N. E. of Burkettsville, they prevail more generally than the brown sandstone itself; here also, it is often excessively hard. Near Rockport, and between that place and Durant Station, the white cherty sandstone is frequently exhibited in the R. R. cuts; as in many other places, it occurs here in disjointed, irregularly shaped blocks, rather than in solid strata, and imbedded in the sand of the Orange Sand Group. I do not know of any deposits of this rock, S. of Attala county. 60. CLAYS.-Numerous varieties of useful clays occur in the Orange Sand formation; among these the following deserve espécial mention : White Pipeclay.-It is widely distributed in the formation, but R-3 34 [T61, 62 GEOLOGICAL REPORT. does not often occur in large masses; usually in nodules or "galls,” from the size of a pea to that of a fist, and sometimes larger. These galls are most commonly found in strongly ferruginous "hardpan" (a semi-indurate mixture of fine sand and clay) but indistinctly stratified; and thus forms striking objects on the other- wise uniform, deeply colored surface. They occur chiefly in the eastern portion of the State, from the Tennessee line down to Hancock county-thus on the Pontotoc Ridge; on the sandy ridges of Noxubee and Kemper, W. of the Flatwoods; in N. W. Wayne county, on the ridges bordering on the Chickasawhay (in the latter region, it occurs in nodules of some size imbedded in white sand; the clay is very pure and is used as chalk and for whitewashing); and in Hancock county, where the Orange Sand hills border on the plains of the Sea-Coast. In all the localities mentioned, however, the quantity is too small to render the material of much practical importance. 61. A large deposit of white pipeclay of great purity, however, occurs in Tishomingo county, chiefly on the southern portion of the territory of the carboniferous formation, following very nearly its western outline. It there forms a regular stratum of considerable extent, which in one locality at least was found to be more than 30 feet in thickness. The bed attains its best development, so far as the quality of the material is concerned, in the northern portion of T. 5 and in T. 4, R. 11 E., where it is about 30 feet underground in the uplands, though at times appearing in limited outcrops on banks of the streams. North-eastward and south-westward from the region mentioned, the bed also occurs, but changed in character- at least near the surface-to a white gritty hardpan, or clays of various colors and much less purity. It forms the lowest visible portion of the Orange Sand formation, and is almost invariably overlaid by strata of pebbles or puddingstone, which in their turn are sometimes overlaid by the common orange-colored sand. 62. The most southerly exposure of these beds, known to me, occurs on a small branch of McDouglas' mill creek, on SS. 4 and 9, T. 6, R. 10 E., near Mr. Pannel's place. For more than a mile along this branch, there are exposures in which about 20 feet of a whitish mass, varying from a fine clayey sand to a white plastic clay, appears overlaid by thick beds (20-40 feet) of ferruginous pebble conglomerate; the latter in its turn, being overlaid by the T63, 64] WHITE PIPE CLAY. 35 common ferruginous sand and brown sandstone, on the hilltops. Similar outcrops appear in the neighborhood of Mr. Aleck Peden's place, on SS. 3+ and 27, T. 5, R. 10 E., N. E. of Pannel's, Here also, a white stratum of which only a few feet are exhibited, is overlaid by pebble conglomerate, and this by the common Orange Sand. The white mass varies from pure plastic clay, to fine grained aluminous sandstone; its upper layers are sometimes composed of a singular conglomeratic mass, consisting of small, white quartz pebbles imbedded in pure white pipeclay. In both localities, copious springs of pure water are shed by the impervious clay strata; at Mr. Peden's there is a fine, bold chalybeate spring, which seems, however, to derive its mineral ingredients (sulphates of iron and magnesia, and common salt) from the adjacent carboniferous strata rather than from those of the Orange Sand. In either of the localities mentioned, materials suitable for fine pottery, or queensware, might be obtained. 63. Thence northward, the stratum is not often found outcrop- ping, but, as has been stated, 20 to 30 feet below the surface of the uplands; the country being but slightly undulating. At Mr. Clingscale's S. 8, T. 5, R. 11 E., the clay stratum) was struck at the depth of about 30 feet, beneath sand and pebbles; it was dug into, without being passed through, for nearly 30 feet more, no water being obtained from below, but dripping in above from the base of the pervious strata. The whiteness and plasticity of the material seemed to increase with the depth. The best portions of what was dug out of the well in question, had already been removed at the time of my visit, having been used for various economical purposes, as "chalk," whitewash, and "Lily-white." The specimens examined were, therefore, rather below the average quality, and on long exposure to the air, their surface shows some yellowish spots. I found, nevertheless, that in baking at a high heat they yielded a biscuit of greater whiteness than their natural color when fresh ; and that fine splinters, exposed for ten minutes to the highest heat of the mouth blowpipe, retained its shape perfectly while reduced to a semi-transparent frit. A quantitative analysis of the clay from Clingscale's well gave the following result: 36 [964, 65 GEOLOGICAL REPORT. WHITE PIPECLAY FROM CLINGSCALE'S. Insoluble Matter. Lime... Magnesia.. Peroxide of Iron. Alumina... Water. 90.877 0.140 trace 0.126 2.214 6.930 99.864 This analysis (which was made solely for the purpose of ascertain- ing the ingredients foreign to the clay proper) proves the singular fact that this clay, though occurring in a formation characterized by the large amount of iron it commonly bears, contains a remarkably small amount of that substance; which, together with the minute proportions of lime and magnesia, explains its infusibility. On S. 7, adjoining Clingscale's, at Mr. Hutchins' place, there is an outcrop of cream-colored clay, which also becomes whiter in baking, and is very refractory. 64. At Mr. Lovress' place, S. 17, T. 4, R. 11 E., strata of white conglomerate, similar to that at Aleck Peden's, were struck in a well at 28 feet; minor layers of beautiful white clay were encoun- tered above this. An outcrop of pure white clay occurs on Peniwinkle Creek, on S. 8, just N. of Mr. Lovress'; the soil of the bottom shows plainly the admixture of this material by its whitish tint. · · On S. 18, at New Warrenton, the white clay has also been found. Thence in a N. W. direction, the white materials appear in cuts on the Memphis and Charleston Railroad, near Iuka, and at Mr. Nall's, S. 22, T. 3, R. 10 E.; overlaid, in all cases, by pebbles or pebble conglomerate. In the localities mentioned, however, the quality is inferior so far as visible (a few feet only), being rather a fine clayey sand than a clay, and traversed occasionally by red streaks. It is possible that at some depth, the quality might improve, as in other cases. In the railroad cuts, the white material was said to contain at times large lumps of dark red clay, the latter being even found independently, in the valley of Clear Creek, underlying the pebbles. 65. In none of the localities heretofore mentioned, the geological position of the white strata, and their connection with the Orange Sand, could be decisively, established. At Mr. Aker's grist-mill, on S. 24, T. 3, R. 10 E., the following T66, 67] QUEESWARE-FIREBRICK. 37 section occurs, which shows the unquestionable equivalents of the white c'ay underlaid by materials possessing all the characteristics of the Orange Sand formation: (Section 1.). SECTION AT AKER'S GRIST-MILL, TISHOMINGO COUNTY. FEET. INCHES. CHARACTER OF STRATA. 0 0 0 0 0 0 0 0 Pebble conglomerate forming the hills 6 оо 0 10 Loose white sands 0 0 14 Pebbles imbedded in clay 8 Reddish-white siliceous clay with streaks, indurate above 3 8 6 Gravel conglomerate; ferruginous 0 0 0 0 0 0 0 o 6 Large pebbles imbedded in clay 1 2 0 0 0 There can be no doubt, therefore, that these white strata, like the pebbles, are only a peculiar local facies of the Orange Sand. 66. Practical uses of these beds. The two most important practical purposes which the materials occurring in the deposits just described, will serve, are, the manufacture of fine queensware, and that of fire-proof brick. * As for the former, the plasticity of the material leaves nothing to be desired; and since the amount of siliceous matter varies greatly in different layers, there could be no difficulty about giving to the mass the precise degree of meagreness which may be found most advantageous, by mixing the several successive layers. 67. The same may be said with reference to the manufacture of fire-brick (to which these materials are admirably adapted); which would probably, at the present time, be the most feasible and profitable manner in which the beds could be made available. The * Not porcelain. Kaolin or porcelain earth contains, besides the white clay, a certain amount of undecomposed felspar, which imparts to it its property of being semi-fused at the temperature of the porcelain kiln. The same property might be imparted to the white clay in question, by the artificial admixture of ground felspar; but it could not thus compete with the natural kaolin of Alabama. en 5 4 NO. 38 [468 GEOLOGICAL REPORT. manufacture of fire-brick differs from that of ordinary brick only in this, that it requires more care, both in working the clay and in moulding the brick. Beyond their fire-proof quality, it is demanded of fire-brick that their shape shall be perfect, their mass uniform, and without flaws in the interior; also, that they shall be liable to the least possible shrinkage in a high heat. The latter quality is imparted to them by a considerable admix- ture of either sand, or ground fire-brick, to the fire-proof clay, which itself ought to be thoroughly seasoned beforehand, and then well worked up with such additions of the above materials as may be required. In judging of the amount of sand or ground brick to be added, it is to be observed as a rule to add as much as may be consistent with the proper firmness of the burnt brick, and with convenient moulding. The latter process ought to be performed as in the manufacture of pressed brick, whenever a first class article is aimed at; for it is only thus that internal and external flaws are entirely avoided. In some localities materials may probably be found which require no further admixture-the strongly siliceous varieties of the clay; but whenever sand or burnt clay is added to the mass, care should be had that it be free from iron, which would seriously impair the fire-proof qualities of the clay. None but white sand ought to be used.-For the rest, they may be burnt in kilns, like common brick. Similar white clays are mentioned by Prof. Wailes as occurring at White Cliffs, Adams county, and near Woodville, Wilkinson county. Of the extent of these deposits, I am not informed. 68. Cream colored, or yellowish, and gray pipeclays, which assume a faint reddish or pink tint in burning, are perhaps the most common in the Orange Sand formation, especially in the northern part of the State, where it overlies the lignitic strata. Most of the clays of the latter formation assume similar tints when burnt though as a general thing they are less refractory-in consequence, probably, of their containing larger amounts of lime and magnesia. The latter substances are copiously contained in the waters issuing from the strata of the formation, last mentioned, while their quantity is extremely minute in those emanating from the Orange Sand strata; which are themselves as remarkable for the almost entire absence of these ingredients, as for the universal prevalence of iron. It would seem that the processes of oxidation and lixiviation which have characterized the Orange Sand, would readily account for the transformation of the dark colored, carbonaceous and magnesian clays of the lignitic strata, into 769] POTTER'S CLAY. 39 may such pipeclays as we now so commonly find in the Orange Sand; and it be frequently noticed, where clays occur in the latter formation immediately. adjacent to similar ones belonging to the former (¶25, 28), that while their upper portion is of a cream color, the lower are bluish and not completely oxidized. Instances of this kind may be frequently observed in S. Lafayette, on the Yockeney-Patapha River, in Calhoun, and N. Yallabusha. It is in this position, viz: on the contact between the Orange Sand, and the Lignitic clay formations, that the best clays for com- mon potter's ware are usually found. The undisturbed clays of the latter formations generally require, not only the admixture of sand but also much more seasoning than those which have already been worked up, as it were, by their re-deposition within the strata of the Orange Sand. 69. Good potter's clay is most frequently found, therefore, in the flatwoods region and the hilly country to the westward of the same, i. e., in W. Tippah, E. Marshall, W. Pontotoc, E. and S. Lafayette, E. Yallabusha, Calhoun, W. Chickasaw, and probably in E. Choctaw and Winston. So far as I know, however, two potteries only, up to the present time, are availing themselves of these deposits; one being at Holly Springs, the other (Mr. Brush's) in N. Tippah county, on S. 17, T. 2, R. 3. E. In both factories, stone-ware of excellent quality is produced.-A third, according to L. Harper, exists at Hartford, Calhoun county; what is the nature of the clay used there, I am not informed. A clay very similar to that employed at Mr. Brush's pottery, but rather superior to it both in color and plasticity, occurs on S. 7, T. 25, R. 7 E., Yalla- busha county; it has been used for tobacco pipes by the whites and Indians both, and also in some cases for white-(or rather gray-) washing houses. It might require the admixture of some sand. A deposit of cream-colored clay, sufficiently refractory for fire- brick, occurs about two miles N. of Oxford, Lafayette county, in a cut on the Mississippi Central R. R. I have for some time used this clay for small crucibles, which resist both a high temperature, and the action of fluxes, remarkably well. A similar deposit occurs on the Yockeney-Patapha River, near the bridge on the Oxford and Water Valley road. On the territory of the Lower (lignitic clay) Cretaceous, also, good potter's clay is found in several localities, especially in S. E. Itawamba, where it has given rise to a pottery (B. Dorsey's) on S. 40 [970 GEOLOGICAL REPORT. # 32, T. 10 R. 10, E. On the territories of the calcareous (Upper and Middle) stages of the cretaceous, as well as of the tertiary formation, clays suitable for pottery are very rare or entirely absent. The calcareous clay marls often greatly resemble potter's clay, butmay be distinguished by their effervescence with vinegar. They are too fusible to serve any purpose of this kind in their natural condi- tion, and they do not appear to have entered to any great extent into the materials of the Orange Sand; which, moreover, is but feebly developed in their region of occurrence. 70. On the territory of the Southern Lignitic Tertiary, or Grand Gulf Group, strata of plastic clay also intervene with frequency between the Orange Sand and the undisturbed clays of the lower formation, while considerable deposits of pipeclay entirely within the Orange Sand are on the whole less common than in N. Mississippi. Their layers and nodules (or "pebbles") of pink and purple clay are of very common occurrence in Wilkinson, Amite, Franklin, Pike, Lawrence, Covington, Marion and Perry, and occur more or less over the whole territory of the Southern Lignitic; but I am not acquainted with any extensive continuous deposits of this character; they are usually met with in wells just before water is struck, and when penetrated, the lignitic clays are commonly reached at no great distance. The pale pink varieties often become of a lighter tint when burnt, and are very refractory; such is the case, for instance, with the variegated (pink and white) clay occurring at Mr. Wesley Gray's mill on Bouie Creek, near Mt. Carmel, Covington county, which would make good fire-brick. The darker colored varieties, how- ever, become´red when heated, and do not resist a high tempera- ture. The intensity of their color is a good indication as to their fusibility. At Mr. Bell's, S. 16, T. 7, R. 11 W., Harrison county, on the Bayou Bernard, there is an outcrop of white and cream-colored pipeclay, which is highly refractory and apparently meagre enough to be worked into fire-brick without any further addition; the Bayou would afford a ready means of conveying it to market. Any admixture of the red and yellow materials occurring at the same place, ought to be avoided. The gra, potter's clays of this southern region will be mentioned in connection with the southern Lignitic formation. 971] RED AND YELLOW OCHRE. 41 Numerous specimens of clays from localities not specially men- tioned here are in the collection of the Survey awaiting examina- tion as to their practical value, and will be reported on hereafter. Potter's clays are mentioned by Harper as occurring in several localities along the Mississippi bluff; but no specialities concerning their kind and geological position are given by him. 71. Not unfrequently, there are found within the Orange Sand formation clays so highly colored as to become of more importance, as pigments or paints, than for any other purpose. In numerous localities, these colored clays have been used for painting houses or fences, in the same manner that the white clay of Tishomingo has. been employed as a whitewash. It has been mentioned (T64) that on the Memphis & Charleston Railroad, near Iuka, masses of red clay were found imbedded in the white mass; and that red veins are frequently visible in other localities. A remarkable deposit of clay impregnated with. peroxide of iron so strongly as to make it valuable as an ochre or paint, occurs further north, on S. 30, T. 2, R. 11 E., near Mr. Biggs' place. The stratum crops out, with a visible thickness of 15 feet, forming the bank of a small stream: it is overlaid like the white pipeclay, by strata of ferruginous pebble conglomerate. The color of the mass is a dull red, resembling that of Burnt Siena earth, with somewhat more of a reddish hue; it contains occasional small veins or lenticular masses of perfectly white clay, resembling the rest except in color. It is but indistinctly stratified, and cleaves- into irregular, massy fragments, the cleavage-planes often being almost black; it is peculiarly smooth or "greasy" to the touch, and when handled assumes a polished appearance. It writes readily on wood or paper, making a brownish red mark, and might easily be cut into pencils. When moistened it exhales a strong clay odor, and on being kneaded forins a plastic mass, which no doubt might be worked on the lathe after due seasoning. On being crushed it forms, with either oil or water, a paste so perfectly uniform and smooth, that the eye is unable to detect any coarse particles on æ white surface painted with it, even when nothing more than a wooden pestle has been used in the process of mixing. It is there- fore a most eligible material for the manufacture of paint, since it requires so little mechanical preparation. The color, as has been stated, very nearly resembles that of Burnt Siena earth (a reddish. 42 [T72 GEOLOGICAL REPORT. brown, very extensively employed), and may be rendered undis- tinguishable from the latter by a very slight admixture of lamp black.-Burning does not change the hue of the paint, but alters the dull red of the raw material to a brick red, which would also, of course, be the color of vessels made of it. The mass does not fuse readily, but is quite refractory; a very high temperature deepens its color and finally blackens it, with the appearance of incipient fusion. 72. As for the manner in which this deposit was formed, the white spots mentioned, between which and the red mass there is a zone of gradual transition, seem to prove that the whole was originally white, and was subsequently impregnated with a ferruginous solution. Unlike the other white clay deposits mentioned, this material, notwithstanding its compactness, is found on close examination to contain numerous minute pores, which in the white portions are distinctly marked by the ferruginous lining of their walls, though equally existing, and open, in both the white and the red portions of the bed. Under the lens they appear distinctly angular, and the space has evidently at some time been occupied by crystals of the form of a square, or possibly rhombic, prism or plate―(probably the former; the length of the major axis being about 0.02, that of the minor 0.01 of an inch), the substance of which has in most cases almost entirely disappeared; although in a few instances I have found those in the white portions incrusted inside with (yellow) hydrated peroxide of iron; while that in the red mass is evidently anhydrous. Whatsoever may have been the original substance of these crystals, it is manifest that the red color did not spread from them as centers (as might be supposed had they been iron pyrites), inasmuch as the latter is entirely indepen- dent of them in its outlines. Their substance was evidently removed by a dixiviating process before the coloring solution infiltrated the clay.—In the lignitic formations, we find clays in which minute crystals of iron pyrites are thus disseminated throughout the mass, and the circumstance that all the pores in the white mass possess an inner coating of iron rust, seems to confirm the supposi- tion that their origin is to be sought in crystals of pyrites, the form of which may have been either that of distorted cubes, or more probably, of the rhombic prisms of magnetic pyrites.* *I may mention in connection with the metamorphis of iron pyrites, just quoted, another singularly complicated case, occurring at McDouglas' mill, Tishomingo county (187). In a loose bed of hornstone pebbles, overlying the lower cretaceous clay, and itself overlaid by Orange Sand, we find some pebbles, studded with little druses of brown iron ore, a few of which still exhibit the forms of a regular octahedron. Similar pebbles, studded with (mostly tetrahedral) crys- tals of pyrites, occur at Turner's mill (T83); and there can be little doubt that here, the common transformation of pyrites into brown iron ore has occurred. But in the interstices between the pebbles, we find loose masses, also of brown 173, 74¹] OCHRES-IRON ORE. 43 I have not personally ascertained the extent of this deposit, but it probably extends both northward and southward from the locality mentioned; and is said to crop out near Mr. McMackin's, 6 miles S. of Eastport. 73. About 3 miles S. W. of Westville, Simpson county, near Mr. Wright's, there occurs a deposit of pipeclay tinged yellow with hydrated peroxide of iron-a color which is rather uncommon elsewhere. It has been successfully used in the neighborhood as yellow paint; the tint is not, however, sufficiently intense and uni- form to render the deposit of any more than local importance. Yellow ochre is of common occurrence in the Orange Sand for- mation throughout the State, but no case has come under my per- sonal observation in which its quantity and quality both would justify its exploitation on the large scale. A considerable deposit, the material of which has already been put to use in times past, exists, according to Prof. Wailes, at White Cliffs, Adams county. Usually, it occurs in small veins or lenticular masses, and very commonly fills the cavities of the concretionary nodules so fre- quently found. I have often heard of "beds" of yellow ochre, in different portions of the State, but have thus far either found them to consist of yellow sand, or, that the existence of a small vein or nodule had been taken as an earnest of a larger deposit close at hand. It is quite likely, however, that such beds may still be found, as the formation is certainly rich enough in the ingredients required. Red ochre, also, is found very extensively, but usually in small quantities. Like the yellow ochre, it has been locally used as a paint in numerous places, and its tints are sometimes extremely beautiful, such as crimson, scarlet and purple. With the exception, however, of the ochreous clay deposit in Tishomingo, above described, I have not thus far found any deposit of coloring matter of this kind, of more than local importance. 74¹. Iron ore.-Aluminous brown iron ore, and brown hematite, as has been mentioned (T13), are very extensively diffused through- out the Orange Sand formation, more especially in the northern iron ore, but their surface studded with brilliant crystalline surfaces of the form and aggregation of Iron Spar, or carbonate of iron. The process which has taken place here, seems to offer some analogy to that just noticed in connection with the red clay (¶71). 44 [9742, 75 GEOLOGICAL REPORT. portion of the State. But although in case of need, if cut off from other States, Mississippi might manufacture her own iron, the desultory mode of occurrence, and uncertain continuity of the deposits, thus far found, of tl e purer kinds of ore. would not justify their exploitation, so long as advantages so greatly superior are offered in adjoining States, where inexhaustible beds of iron ore and coal often occur in one and the same mine. The purest ore I have seen from this formation (a fibrous hema- tite) is found in Mr. Null's neighborhood, N. of luka, Tishomingo county. It occurs there in sheets and layers to 2 inches thick, imbedded in yellow sand, and has been commonly mistaken for copper ore. Average specimens yielded 55 per cent. of iron. 742. Materials for glass.-White sand has been mentioned as of frequent occurrence in the Orange Sand formation. It is rarely, however, free from clayey particles, and altho' applicable to the purpose, such sand would not, as a general thing, be eligible for making white glass, unless previously freed from them by wash- ing; as is often done naturally by the streams traversing the sandy regions, and more especially, by Pearl River and its tributaries, whose drifts of white sand often vie in purity with those of St. Genevieve in Missouri, whence the Pittsburg glass works receive a large part of their supply. 75. WATERS OF THE ORANGE SAND FORMATION.-It has been stated already that the waters percolating through the Orange Sand formation, at the present time, are remarkable for the small amount of the salts of lime and magnesia which they contain, and may therefore be uniformly characterized as freestone waters. Silica, and iron in the shape of proto-carbonate, are the ingredients which at times appear in quantities sufficiently large to render the water mineral. The former is rarely altogether absent; the latter is sometimes contained in large quantities, but is very inconstant; in wet seasons it often is more abundant than in dry ones, and at times, chalybeate waters may be seen oozing out of every little rill. Then again, springs which originally were chalybeate, cease to be so after the land on which they are situated is cleared; and others lose their mineral properties so soon as they are cleared of leaves and other decaying vegetable matter. In fine, they are obviously dependant to a great extent, for their mineral properties, on the accidental condition of the surface, and therefore unrelia- 976, 17] WATERS OF THE ORANGE SAND 45 ble. It must be recollected, however, that although a spring may run out of the Orange Sand materials, it may have its origin in different strata; such, in fact, is the case with most of the mineral springs of the State, and not unfrequently the freestone water of the Orange Sand is rendered mineral by merely running over the surface of another stratum. 76. While, however, the quality of the water obtained from the Orange Sand, whether in wells or springs, is generally excellent, its quantity and availability leave much to be desired. This is owing to the perviousness of the greater portion of the mass of the formation, and the want of continuity, or irregularity of the impervious strata which it does contain. Where the Orange Sand prevails in force, wells often require to be sunk to great depths, and very frequently through the entire thickness of the formation, to where it rests on older and less pervious strata, which shed the Yet sometimes, in the middle of such a district, a few wells in a particular locality may yield water at a moderate depth, by striking, accidentally, some lenticular mass of clay of inconsid- erable extent, and no less perhaps, of inconsiderable thickness; so that after a while an incautious cleaning out, the falling of a a bucket, or a slight shock of an earthquake, would break through it and allow the water to sink. A further deepening may reach another impervious ledge, which itself may give way in time; and thus wells are frequently kept deepening until either the un- derlying impervious formation is reached, or the depth becomes inconvenient, as has been the case at the University of Mississippi. At Oxford, close by, water is reached at moderate depths; and in searching for the cause, we shall find outcropping in the ravines adown the hillsides, several successive ledges of cream colored pipeclay, which we look for in vain in the R. R. cut, midway be- tween the town and the University. In the Orange Sand, there- fore, wells of 80 to 100 feet and more, are of common occur- rence. 1 77. It is thus that in the more elevated ridge lands of S. Simp- son, and S. Smith counties, for instance, the regular, rounded hol- lows and valleys are often without even a channel for flowing water; some bunches of leaves floated up against trees or bushes, give the only evidence that at times, in heavy rains, all the water is not absorbed by the sand. Yet even the next day after a rain, 46 [T77 GEOLOGICAL REPORT. the thirsty traveller may follow these hollows downward for miles, without seeing even a puddle, or a drop of water, until at last, when the level of the water-shedding stratum is reached, not single springs, but entire creeks of beautifully clear water are found flowing out at the foot of the hills. In the agricultural portion of the present Report, the condition of the several districts with reference to waters and wells will be more specially mentioned; and in connection with these, also, those regions in which the Orange Sand is so strongly developed as to conceal entirely the other formations, will be more particularly noticed. 7 t : THE CARBONIFEROUS FORMATION. 78. The territory on which this formation appears, in Mississippi, is so small (as will be perceived by a glance at the map) that its geological relations can hardly be satisfactorily studied within the limits of the State; its outcrops are comparatively few, and of small extent, in consequence of its being thickly overlaid, in most places, by masses of pebbles, and other materials of the Orange Sand formation (T18). It is the more difficult to ascertain the order of superposition of the several strata, because in different localities, they appear partly horizontal, partly at various inclinations to the horizon, in opposite directions. Thus in its extreme southern portion (at Grisholm's Factory or Bay Spring) the heavy ledges of siliceous sandstone show a slight southward dip; at the Cypress Pond, on SS. 25 and 17, T. 5, R. 11 E., the dip of the sandstone, overlaid by limestone, is decidedly to the northward; and again, at Eastport, we find a black calcareous slate, like that which, in Alabama and Tennessee, is at the base of the Carboniferous system, at the high points of the surface, without any appreciable dip, and overlaid by cherty strata which elsewhere seem to be overlaid by limestone, and are, probably, equivalent to the siliceous sandstone of Bay Spring. It would seem, therefore, as if some of the folds of the strata, caused by the upheavals in Tennessee and Alabama, extended, at this point, into Mississippi. 79. The fossils thus far collected, according to a general exam- ination, kindly given them by Prof. W. D. Moore, of the University, distinctly place the greater portion of the outcrops within the limits of the Warsaw and Keokuk Limestones of the Iowa Report, as will be seen from those mentioned below; but thus far, observations are insufficient to allow of separating those belonging to each of these groups. There are probably, also, a number of undescribed species; and it seems likely that lower, and perhaps even higher groups of the subcarboniferous series may hereafter be found to be represented. 48 [480, 81¹, 812 GEOLOGICAL REPORT. 80. The chief materials of the formation have already been mentioned as consisting of limestone (of different degrees of purity), chert or hornstone, and siliceous sandstone. The several degrees of transition of these rocks into one another are also represented, besides which, we find underlying the sandstone in several localities, a black clay shale charged with iron pyrites-the representative, perhaps, of the hydraulic slate of Eastport. } 811 Localities of the Carboniferous Formation.-At Red Sulphur Springs, in T. 1, R. 10 E. (in Tennessee), a spring of strong sulphur water comes up from beneath a ledge of gray, non-fossiliferous, slaty hydraulic limestone of a perfectly uniform, dense, texture; which characterizes the northern portion of the formation. It is here as elsewhere overlaid by a stratified hornstone formation, whose lower portion is very hard and solid, and fossiliferous (Fenestella, Pro- ductus); but further up it becomes very brittle and almost void of fossils, and is interstratified with layers of pebbles imbedded in clay, which have been described before (T31). Very nearly the same condition of things obtains all along Yellow Creek, so far as its course lies through the territory of this formation; on the lower portion of its course, however (from the crossing of the Red Sulphur Springs and Eastport road, to its mouth), we find on the left bank, the gray slaty limestone overlaid by a variety of aluminous sandstones, which in their highest portion became merely a soft, gray, sandy shale, void of fossils. Judging from some apparent transitions, these sandstones (of which there are some 15 to 20 feet) are the equivalents of the hornstone. We see, however, on the right bank (e. g. at Billing's mill) the slaty limestone itself appearing at the same level at which, on the opposite side, we find the sandy rocks. The former here gives rise to bald rocky hilltops, on which little else than the Prickly Pear and Stone-crop can find sufficient nourishment; and similar hilltops (which are of some importance as furnishing an excellent hydraulic limestone) are said to occur with frequency in the hills bordering on the Tennessee River, in the State of Mississippi. At Eastport, it is seen on the slopes of the ridge towards the river; in the bed of Big Bear Creek, and in that of a small creek which empties into the latter, close to the town. Here, as elsewhere, it is totally destitute of fossils; it cleaves readily into lenticular plates, with it a rough surface, and contains not unfrequently, hard, flat, siliceous nodules, of a few inches diameter, in which we generally see a few golden yellow crystals of iron pyrites. Analyses of this rock, as well as of that occuring on hilltops near Billings' Mill, will be found below (T92-93). ! Impure gray limestones, at times deserving rather the name of calcareous chert, crop out frequently in the bed of Yellow Creek, from its mouth upwards. Near Scruggs' bridge, on S. 16, T. 2, R. 10 E., there is an extensive outcrop of rock resembling in every respect, that of Eastport. 812 The siliceous deposits which overlie this rock in the neighborhood of Eastport, have already been, in part, described (31). The large masses of 182] HORNSTONE BRECCIA. 49 detritus derived from the pebble strata, which here cover the hillsides, render it difficult to observe fully the series of the Carboniferous. The lowest stratum which I have observed overlying the calcareous slate, is the singular deposit of pulverulent silex (¶30) traversed by bands of hornstone in all stages of decay. This deposit, in which I have seen but a few fragments of carboniferous fossils (columns of Pentremites) has been struck in a well at Eastport, and crops out in a valley one mile S. of Eastport. [The occurrence of bluffs of this material, under circumstances similar to those under which it is found in Mississippi, near Gravelly Spring P. O., Lauderdale county, Alabama (nearly due E. of Eastport), is mentioned by Prof. Tuomey (Second Report on the Geology of Alabama, p. 9)]. The hills enclosing this valley are high and steep; their upper portion is formed by ferruginous pebble conglomerate or puddingstone, in which fragments of geodes of crystallized quartz are sometimes found; the lower by the ferruginous hornstone breccia described before (130). Underlying it, with a visible thickness of about 8--10 feet, appears the white silica deposit. The greater portion of it is pulverulent, and feels gritty (like starch) between the fingers; it is traversed, however (not always horizontally), by layers of hornstone 2--6 inches in thickness, which are not solid, but appear as though shattered into fragments; were the ferruginous cement present, it would form a breccia like that which overlies. In these layers, all grades of transition from solid hornstone into pulverulent, starchy silica, may be traced with ease. It seems difficult to account for the condition of these hornstone layers, except by the contraction, in drying, of a gelatinous mass. The adjoining fragments usually fit each other, though not always exactly, and the same is the case in the overlying breccia, which seems to represent the solid hornstone ledges occurring at other points. W. of Eastport, we find this breccia apparently alternating with layers of hornstone, of which, also, it sometimes contains large lenticular masses. Near to the planes of contact of the breccia and the pebble conglome- rate of the Orange Sand (T30), the ferruginous cement is usually, not brown, but brick red. On the waters of Little Bear Creek, in the southern portion of T. 3, R. 11 E., we find (e. g. at Mr. Common's gin-house) the hornstone breccia overlying directly an impure, sandy limestone, which here contains great numbers of Productus costatus Sow., and a Spirifer (allied to S. bimesialis HALL). 82. At the point where the M. and C. R. R. crosses Big Bear Creek, limestone more thickly laminated, and purer than the gray slate at Eastport, crops out on the banks. S. of the R. R., on SS. 10, 2 and 1, T. 4. R. 11 E., along the old District Road, we find outcrops where a soft calcareous shale, characterized by immense numbers of a Chonetes (allied to C. sarcinulata), but containing also Terebratulæ, Produc- tus costatus, stems of Pentremites, Stylopora Prouti, and Zaphrentis spinulifera, overlies a sandy limestone containing abundance of Pentremites conoideus, HALL, Spirifer pseudolineatus, HALL, Terebratula, a very large elongated Productus, Cyathophyllum, and columns of Archimedes. This limestone stratum, which is of inconsiderable thickness (about 10 feet), is underlaid in several localities by sand- R-4 50 [T83, 84, 85 GEOLOGICAL REPORT. stone, which above is calcareous, lower down, siliceous, and destitute of fossils 83. On S. 22, same T. and R., at Mr. Turner's mill, there occur in the bed of. Big Crippled Deer Creek, outcrops of whitish chert containing abundance of fossils, among which Fenestella, Gorgonia, Cyathophyllum (Zaphrentis ?), Pro- ductus, Terebratulæ and stems of Pentremites are conspicuous; it contains also small druses of iron pyrites, altogether tetrahedral in form, which does not vi- triolesce, but is undergoing transformation into brown iron ore (T¶72) and contains between 2 and 3-10,000 of silver. A short distance northward, on S. 15, we find the hornstone, which crops out in gullies, gradually changing into siliceous sandstone destitute of fossils, and resembling that of Bay Spring. Close by, at a level somewhat higher, we find outcrops of a limestone ledge, and above this still, on the hillsides, we see angular fragments of hornstone- from which, although none of the latter was seen decidedly in situ, it would appear that the limestone is here both over- and underlaid by hornstone. 84. No limestone seems to crop out on, or E. of the main channel of Bear Creek, where its course lies through TT. 5, 6 and 7, RR. 10 and 11 E., in S. E. Tishomingo county; but outcrops of siliceous sandstone, of various degrees of hardness, and destitute of recognizable fossils, are of common occurrence. In traveling through the hilly and rocky region intervening in Alabama, between Rock Creek and Cedar Creek, E. of Big Bear, in TT. 4 and 5, R. 12 E., I have seen the limestone and sandstone alternating repeatedly, in such a manner as to indicate a northward dip. At one point, a stratum of limestone only 15 feet in thickness, is over-and underlaid by non-fossiliferous, siliceous sandstone. At Mann's mill, near the mouth of Cedar Creek, the S. bluff of the creek consists of laminated siliceous sandstone, so hard as to strike fire readily; the layers being from ½ to 1½ inches thick. A short distance above, there are several small caves, about 3 yards wide by 1% high, running down obliquely into the sandstone; about 15 feet below the surface they terminate in pools of clear cold water, which is said to rise and fall with that of the creek-although to the observer they appear to be rather above the level of the latter. 85. Further above still, near Walnut Peak P.O. (Mr. Suddard's) there is on the left side of the creek a large slough, known as the "Cypress Pond," which, running around in horseshoe shape, incloses between itself and the main channel of the creek, the greater part of S. 17, T. 5, R. 11 E. On the tract thus inclosed the Orange Sand alone prevails; but on the landward bluff, which is from 30 to 40 feet high, there are outcrops both of limestone and sandstone. At the N. extremity of the semi-circle, the sandstone (which here is soft, yellowish, and effervesces with acids) appears at the foot of the bluff, while higher up we have a solid, black or gray crystalline limestone of considerable purity, which occupies the upper portion of the bluff for some distance southward of the point men- tioned. The sandstone, however, gradually rises and takes the place of the limestone, until at the S. end of the bluff, as well as at Mr. Suddard's house, nothing but the soft, laminated, effervescent sandstone, destitute of fossils, is to be seen. י 86. Several branches empty into the "Pond," and among these, one, at the N. end, has excavated for itself a deep, almost square, and for some distance 987] CYPRESS POND-MCDOUGLAS' MILL. 51 subterranean channel in the limestone, so as to appear and disappear repeatedly. In exploring one of these channels (which is 18-24 inches wide by about 3 feet high) for about 20 yards, I found the rock to be solid on all sides, the roof being curiously worn into cornice work, as though by the dripping of water from above; but there are no stalactites. The fetid bituminous odor of the limestone pervades the air of these caves, as well as the water itself, which is, in consequence, undrinkable, and very hard besides. The upper strata of the limestone are of a light gray tint, crystalline, and abound in fossils, especially columns of Pentremites, which appear prominently on the weathered surfaces. Lower down, however, the rock assumes a black tint, is almost destitute of fossils, and contains numerous small oolithic grains of a somewhat ferruginous material. Both kinds of limestone, whose cleavage is here generally massy, are very fetid. An analysis of the rock of the upper (purer) stratum is given below (¶95). 87. Northward of this point, also, in the same T., limestone sometimes appears on the hillsides. To the southward of it, however, I know of only one locality at which limestone is found viz: McDouglas' mill on the waters of Mackay's Creek, S. 5, T. 6, R. 10 E. At this point we obtain, on the bluff of the mill creek, the following section : (Sec. 2.) SECTION ON MCDOUGLAS' MILL CREEK. FEET. CHARACTER OF STRATA. 20 Orange Sand forming hilltops. to 40 Loose cherty pebbles, or ferruginous puddingstone. 10 Gray laminated clay, of the Eutaw Group (cretaceous). NO. CO • 10 स 1 • • I alled gadg 30 1 9 .... Gray crystalline limestone, in ledges 1 to 8 inches thick, containing Ptylopora Prouti, Sprifer (allied to Sp. bimesialis), Pentremites (symmetricus ?) Fenestella, Terebratula, etc.; also spires of Archimedes. w Yellowish or reddish, hard, siliceous sandstone, in laminae 12-12 inch thick, with indistinct fossils-apparently 2 heads and columns of a very large Pentremites. Black, semi-indurate clay shale, charged with iron pyrites. Bed of creek. 1 The fossils of the limestone, No. 3 (which is in places quite soft) are often 52 [T88, 89 GEOLOGICAL REPORT. prominently exposed on weathered surfaces, and sometimes washed out of the mass altogether. The indistinct fossils of the sandstone, No. 2, stand out prominently on its cleavage planes. Whether or not the shale stratum (No. 1) is fossiliferous, I could not ascertain. 88. The outcrop at McDouglas' mill constitutes an isolated outlier of only a few acres, between which and the outcrops at Peden's, Gardner's, and Bay Spring, we find (see below) only the strata of the Orange Sand and Eutaw Group. Between Suddard's Ford (Walnut Peak) and Scott's mill on Big Bear Creek S. 12, T. 5, R. 11 E., high bluffs of siliceous sandstone frequently occur on that stream, forming some of the little rock scenery to be found in the State. It occurs usually in ledges, from a few inches to 3 feet in thickness, is less flinty than that at Mann's and McDouglas' mill, and well suited for grindstones and flagstones. Outcrops of this sandstone are common, also, in the country border- ing on Big Bear Creek, in the S. portion of T. 5, and in T. 6, RR. 10 and 11 E. Near Mr. Gardner's, on S. 36, T. 5, R. 11 E., there is a narrow valley excavated altogether into the sandstone, whose ledges form vertical walls 20-25 feet high on both sides, the talus at their base being strewn with huge blocks which have fallen from above. The ledges, whose thickness varies from 1g of an inch to 3 feet and more, seem to lie horizontally; the rock is usually hard enough to be suitable for grindstones and flagstones, though in some points it may be crumbled between the fingers. On the cleaved surface we often see, besides the ripple marks, curved tracings as of Cololithes or Serpulæ ; but no distinct fossils occur. 89. At Mr. Alex. Peden's place, S. 34, T. 5, R. 10 E., the same sandstone ap- pears, overlaid here both by ferruginous pebble conglomerate, and the strata of the white pipeclay deposit (T62 ff.). At Bay Spring, we find outcropping on Mackay's Creek, for about 2 miles above, and 1½ mile below the factory, the hard siliceous sandstone of the Carboniferous. At the latter place itself, heavy, solid ledges of hard sandstone form the banks, both of the main creek and of a tributary which empties into it at that point; they show a dip of 2 to 3 deg. southward. The same indistinct impressious on the surface of the slabs, mentioned at Gardner's, are seen here. This is the most westerly outcrop of the Carboniferous formation in Mississippi. All along Rock Creek (of Mississippi) and its branches, E. of Bay Spring, the sandstone crops out-more or less variable in its hardness and the thickness of its layers, yet still essentially the same. At Mr. Jourdans, S. 30, T. 6, R. 11 E., and at Mr. Smith's mill, on S. 32-both localities on Rock Creek-the sand- stone is underlaid by a black clay shale precisely similar to strat. No. 1 at Mc- Douglas' mill (¶87, Sec. 2); into which, at Smith's mill, the sandstone shows a transition, by the appearance of clay "galls," and the gradual softening, and darkening of the tint, of its lower layers.-The last outcrop of the carboniferous sandstone on Rock Creek occurs a few miles above its mouth; it also crops out, though it does not form high bluffs, on Big Bear Creek, in TT. 6 and 7, RR. 10 T90, 91, 92] HYDRAULIC LIMESTONE. 53 and 11 E., and in the hilly country intervening between the two creeks——where, however, even deep wells frequently terminate in the gray laminated clay of the Eutaw group. USEFUL MATERIALS OF THE CARBONIFEROUS FORMATION. 90. These consist of Limestones, both common and hydraulic, Sandstones, and materials for Glass. Bituminous coal is not to be looked for, since the strata appearing in Mississippi cor- respond to those underlying the Coal Measures in Alabama and elsewhere; so that by mining in them, we should recede from, instead of approaching to, the level at which the coal is always found. According to the geological map of Alabama, the rocks of the Coal Measures of the Warrior coal field approach nearest to (within 7 or 8 miles of) the Mississippi line, in Marion county, Ala.; but I am not aware whether the coal itself extends so far. 91. HYDRAULIC LIMESTONE. The dark-colored (black or gray) slaty rock, which occurs near Eastport, and which may be looked for, more or less, all over that part of the region colored black on the map, which lies N. of the line between TT. 2 & 3, possesses strongly hydraulic properties; i. e. it does not slake after burning, like common limestone, but if pulverized and then wetted, will harden under water, like Portland or Roman Cement. This prop- erty is imparted to the limestone by the clayey impurities which it contains, and in imitation of this natural mixture, hydraulic cement is now sometimes prepared, either by treating in the same manner as the rock naturally occurring, an intimate mixture of clay and lime, artificially prepared, or by mixing with quicklime certain substances naturally occurring (such as the puzzolana of Italy) in a finely ground condition. These artificial cements, however, are rarely equal to those prepared from good natural hydraulic limestone. The principal localities of occurrence of this rock thus far ob- served, have been mentioned above (¶81). 92. The rock which forms the bald hilltops on the right bank of Yellow Creek, at Billing's mill, S. —, T. 1, R. 10 E., (and which may probably be found in many similar positions in the hilly coun- try lying between the Red Sulphur Springs and Eastport road, and the Tennessee River), I have found to be of very superior quality; the cement made of it sets almost as rapidly as plaster of 54 [193 GEOLOGICAL REPORT. Paris, and becomes very hard. An analysis of a portion of the specimens showing these properties, which readily cleaves into thin lenticular plates, is black on the fresh fracture and gray or whitish on the weathered surfaces, gave the following result: HYDRAULIC LIMESTONE FROM BILLING'S MILL. Insoluble Matter... Potash. Lime.. Magnesia.. Peroxide of Iron. Alumina Phosphoric Acid. Carbonic Acid.. • Organic Matter, Water, and Loss. • 54.201 0.473 23.247 0.788 0.903 1.064 trace 15.572 3.752 100.000 From the aspect of the outcrop, the quality of this rock does not seem to vary for 18 or 20 feet at least. No rock is seen in the bed of Yellow Creek at the point in question; but farther below, near its mouth, impure cherty limestone, in layers from one to several inches in thickness, appears near the water level. It is doubtful whether this rock would answer the purpose of hydraulic limestone, whose best quality always seems to be announced, in this region, by its splitting easily into thin plates. It is quite likely, however, that rock of equal quality with that on the hill- tops near Billing's mill, might be found at a lower level also, and nearer the creek. The rock which near Scruggs' bridge, on SS. 16 and 9, T. 2, R. 10 E., crops out in several bluffs on Yellow Creek, with a thick- ness of some 30 feet, coincides most closely with that occurring at Eastport, and no doubt possesses a similar composition, and prop- erties (see below). Many similar bluffs exist, no doubt, between Scruggs' bridge and Billing's mill. 93. At Eastport the rock is found, as has been stated (T81), in the bed of the creek which empties into Big Bear just S. of the town; in the bed of the latter stream itself; and on the slope, towards the Tennessee River, of the hill on which the Female Academy is situated. An analysis of a specimen from the latter locality, little different in aspect from that at Billing's mill, gave the following result: T94] HYDRAULIC LIMESTONE. HYDRAULIC LIMESTONE FROM EASTPORT. Insoluble Matter. Potash.... Lime Magnesia Peroxide of Iron Alumina Carbonic Acid, Water, and Loss.. 35.281 0.348 32.603 0.630 1.581 1.914 27.643 100.000 55 For want of a sufficient quantity of material, I have been una- ble to make reliable experiments on the comparative rapidity of "setting" of the cement burnt from this rock; it seems, however, to solidify somewhat less rapidly than that from Billing's mill. 94. While these analyses, as well as the experiments made, leave no doubt as to the adaptedness of these rocks to the manufacture of excellent hydraulic cements, it must be recollected, that for each variety of hydraulic limestone there exists a certain degree of burning, after receiving which, it hardens best, or most rapidly. If on the other hand, the burning exceeds, or falls short of, that particular degree, the hydraulic properties will be the more im- paired, the farther the burning given varies from the proper degree. The latter can only be determined by experiments on the large scale, in kilns properly constructed; the general rule being, that hydraulic limestones require much less burning, than those yielding quicklime. On account of the inequality of temperature which always prevails in the common lime-kilns, where the process is in- terrupted in order to draw the charge, these are altogether unsuit- ed to the burning of hydraulic cement; and since, moreover, the manufacture of the latter involves, of necessity, the establishment of a mill (for grinding the calcined rock), and therefore, pre-sup- poses the existence of a constant demand to be supplied by contin- uous manufacture, the "perpetual” kilns, in which the burning goes on without interruption, are alone adapted to this purpose. In view of the lively demand for hydraulic cements which exists in this State; of the high tax imposed on the consumers of this article by the long transportation which it has to undergo at pres- ent, and of the convenient accessibility of these deposits by way of the Tennessee River, while distant only 7 or 8 miles, at their nearest points, from the M. & C. R. R. (to which access might also be had, at high stages of water, on Big Bear Creek) there is rea- 56 [T95 GEOLOGICAL REPORT. son to hope that they will not long remain unused. It is quite likely that due S. of Eastport, and on Big Bear Creek, they may be found to approach the R. R. much nearer than is the case on Yellow Creek. The limestone I have seen on Little Bear Creek, however, at Mr. Commons' (T81), as well as that cropping out on Big Bear Creek near the crossing of the R. R., though impure, is of a different character, and probably better adapted to burning lime for agricultural purposes, than for the manufacture of hydraulic cement. 95. LIMESTONES, for quicklime.-Most of the limestones mentioned above (T82 to 87) are suited to the manufacture of quicklime; the localities, however, where the limestone occurs in the greatest abundance and purity, are at the Cypress Pond (Walnut Peak P. O., ¶85,86), and at McDouglas' mill on Mackay's Creek waters (T87). At the former place, as before observed, two varieties of limestone occur; one, the uppermost stratum, being gray, and rich in fossils, the lower, black and almost without shells. Both rocks indiscriminately have been used in the preparation of quick- lime, the product being of excellent quality, and perfectly white. The upper stratum containing the shells is, nevertheless, the purer, and ought to be preferred when the lime is to be employed in plastering and whitewashing. An analysis of this upper, purer rock, yielded the following result: GRAY LIMESTONE FROM THE CYPRESS POND. Insoluble Matter.. Lime.... Magnesia Peroxide of Iron and Alumina.. • Carbonic Acid.. Carbonaceous Matter. 1.680 53.495 0.817 0.580 42.035 1.340 99.947 1 cwt. of the limestone will therefore yield 56 lbs. of strong lime, containing not quite 3 lbs. of foreign matter. This limestone is, therefore, the purest found in the State, and will yield lime equally as good as the majority of the imported article. The limestone at McDouglas' mill is somewhat variable in its different ledges; several of these are equally pure, if not purer, than that of the Cypress Pond. This is especially the case with those on whose fractured surfaces we see numerous smooth faces of 996] BUILDING STONES-GRINDSTONES 57 a glossy lustre, which are formed by the broken heads of a fossil, of about the size and shape of an acorn of the Red Oak (Pentre- mites) consisting of pure crystallized carbonate of lime or calca- reous spar. The lime burnt from these ledges would be pure enough for any purpose. There is no lack of fuel in the regions where these rocks occur; and abundance of fireclay to serve for the construction of the inner lining of the permanant "perpetual" kilns. 96. BUILDING STONES, GRINDSTONES AND FLAGSTONES.-The sandstone which has been mentioned as cropping out on Big Bear Creek, where its course lies through Mississippi, as also in the southern portion of the territory of the Carboniferous generally, is a very durable rock in almost all cases where it can be obtained in blocks of suitable size. It is only some of the slaty and calca- reous varieties, like those mentioned as occurring at the Cypress Pond (185), which are subject to a considerable degree, to weath- ering. Large uniform blocks can be obtained below Scott's mill on Big Bear Creek, for several miles (188); at Gardner's (T88), at Bay Spring (189), and at several points on Rock Creek. ; The locality first mentioned, viz: the long bluff extending, chief- ly on the E. side of Big Bear Creek, for several miles below Scott's mill, is of interest in another point of view. The rock occurring here is a sharp sandstone, of the proper degree of hardness for grindstones, and of great uniformity throughout; moreover, the ledges cleave with facility and with very straight and smooth sur- face, into slabs of various thicknesses, from an inch to several feet so that all the labor needed to transform them into grindstones, would consist in cutting them round; while the thinner ledges might serve for whetstones. Bear Creek, in times of high water, would afford a most convenient means of shipment, but for the dis· agreement existing between the States of Mississippi and Alabama as to its navigability-Alabama having declared it a navigable stream, whereas in Mississippi, numerous mill-dams have been built across it. The rock near Gardner's, which is of a similar quality, but less uniform, might also furnish grindstones. That at Bay Spring is too hard for the purpose. Flagstones of large size, and of various thicknesses, can, of course, be also obtained at these localities. 58 T97, 98 GEOLOGICAL REPORT. 97. MATERIALS FOR GLASS.-The deposit of white pulverulent silica, which has been mentioned (T30,812), is of very superior quality for this purpose, and being in a fine state of division, it would be preferable to the sand commonly used, for rapidity of fusion. The largest beads which could be fused before the blow- pipe, of a mixture of this material with soda, were perfectly color- less in either flame. There are portions of it which are tinged with iron, but by far the larger part is of great purity, and might be mined with easc, like coal, by means of horizontal galleries. The outcrop examined by me is in a small valley opening on that of Big Bear Creek, about 1 mile S. of Eastport (T812). The same stratum has been struck in wells at the latter place, and he deposit is probably co-extensive, in Mississippi, with the hornstone breccia itself, which overlies it, and occupies all of T. 2, R. 11 E., the N. part of T. 3, and N. E. ½ of T. 2, R. 10 E.-The inhabi- tants designate both the white pipeclay and the silica as "chalk ;" the latter may, however, be readily distinguished from the former by its not affording any permanent white streak on wood; it "does not write." It is important to observe this difference, for the white pipeclay would be utterly useless in glass-making. Occurring, as this material does, close to the banks of the Ten- nessee river, easily mined, and preferable as it undoubtedly would be to the coarse sand so often employed in glass-making, and which itself is shipped to considerable distances, it would seem that the exportation to the Pittsburg glass works, at least, via Tennessee and Ohio rivers, could be made a profitable business. For the manufacture of the soluble glass, or silicate of soda, now coming into use so extensively, a more desirable material could scarcely be procured. 98. WATERS OF THE CARBONIFEROUS FORMATION.--Most of those occurring on its territory are derived from the overlying pebble for- mation, and are remarkably pure-as also, of course, are those flowing from the siliceous sandstone. The chalybeate occurring at Peden's (¶62), is probably derived from the laminated clays of the Eutaw group. The Red Sulphur Spring in Tennessee (T. 1, R. 10 E.) is the only prominent example I know, of a mineral water which is cer- tainly derived from the rocks of this formation. It would seem that any spring or well reaching the black shale underlying the T98] WATERS OF THE CARBONIFEROUS FORMATION. 59 sandstone at McDouglas' mill (T87, No. 1 of Sec. 2) and Jourdan's, would of necessity possess mineral properties. The small amount of sulphates and of magnesia, which the mineral waters at Iuka contain, seem to indicate that they are derived neither from this stratum, nor from those of the lower cretaceous; while the Orange Sand alone would not be likely to impart sulphuretted hydrogen to them. 1 THE CRETACEOUS FORMATION. 99¹. The territory occupied in Mississippi by the several stages of the cretaceous formation may be briefly defined as comprising (with the exception of a few townships in E. Tishomingo, occupied by the carboniferous rocks) all that portion of the State lying east of the following approximate line: From the point where Muddy Creek crosses the Tennessee line, via Ruckersville to Ripley. Tippah county; thence S. W. nearly to the line between ranges 2 and 3 E.; thence undulating nearly due S. to Houston, Chickasaw county; thence S. S. E., with a slight curve towards S. W., to Scooba, Kemper county, and to the Alabama line. On the map this line is laid down more in detail, the cretaceous formation being represented by the several shades of green. 992. The general dip of the strata is between W. and S. W., at the rate of from 20 to 30 feet per mile. In the absence of surface levelings in the direction of the dip; in consequence, also, of the limited extent of the outcrops in the same direction, and the variability of the strata themselves (both as to character and thickness), accurate determinations of the dip are extremely difficult. A number of observations in bored wells in Lowndes county, collected and discussed by Dr. William Spillman, of Columbus, Mississippi, gave the dip in that region between 25 and 30 feet S. W., which is also the amount currently assumed by the well, borers in Monroe, Chickasaw and Lowndes. In the counties of Pontotoc, Itawamba, Tishomingo and Tippah, however, the bored wells are so few, and the hilliness of the country renders estimates of comparative surface levels so uncertain; the strata moreover are so variable, that I have been unable to obtain satisfactory data with reference to dip. It appears on the whole, however, to be rather less than that observed in the more southerly portion, and more nearly due W.; probably, over the whole of the cretaceous belt, at right angles to its W. and S. boundary line, since in Alabama, where the latter runs nearly due E.,), it is mentioned by Tuomey as T100] GROUPS OF THE CRETACEOUS. 61 being due S.; in Tennessee, according to Safford's map, the outlines bear N. N. E. In general, therefore, the dip of the cretaceous strata may be briefly defined as diverging from the upheaval of the Cumberland Range, around whose western and southern spurs it forms a crescent shaped belt extending from Tennessee, through Mississippi and Alabama, to the Ocmulgee River; its average width being, however, much less than that given in Hitchcocks' and Lyell's maps, and not often exceeding fifty miles. 100. In the cretaceous strata of Mississippi, at least three well defined groups or stages may be distinguished, the middle one of which exhibits two distinct facies, themselves deserving, perhaps, the dignity of separate stages. In preference to designating these stages as the Upper. Middle, and Lower Cretaceous, which might give rise to misapprehensions in reference to their relations to the strata of other regions, I shall apply to them specific names, already recognized and understood to some extent. These groups I shall briefly characterize in general, before passing on to their special description, without, however, for the present. attempting to parallelize them to those of more distant regions; to do which intelligently, the study I have thus far been able to bestow on them, is hardly adequate. I. Lowest. EUTAW GROUP.*-Bluish black, or reddish, laminated clays, often lignitic, alternating with, and usually overlaid by, non- effervescent sands, mostly, (though not always) poor in mica, and of a gray or yellow tint. Contains beds of lignite, very rarely other fossils. Those found (by Tuomey, in Alabama-none in Mississippi) are silicified, and the sand when indurate, shows a siliceous cement. II. TOMBIGBEE SAND GROUP.-Sharp, strongly micaceous sands, of greenish hue, laminated when indurate, and cemented by carbonate of lime. Very unequally developed in different localities, and apparently subordinate to the Rotten Limestone, into which it shows many lithological transitions, and many of whose fossils it shares. It is remarkable for the large number of species and individuals of Inoceramus which it contains, and also for the occurence in it of the gigantic Ammonites Mississippiensis, SPILLM. • *I adopt this name in view of these beds having been first examined in detail, and recognized as being of cretaceous age, by Tuomey, near Eutaw, Alabama, where they are characteristically developed. 62 [T101 GEOLOGICAL REPORT. III. ROTTEN LIMESTONE GROUP.-Soft, chalky, white limestones of great uniformity and thickness, passing into heavy calcareous, massy clays, or light colored clay marls. Fossils numerically abundant, but species few. Characteristic are: Placuna scabra; Janira quinquecostata; Gryphæa convexa, mutabilis, Pitcheri; Ostrea falcata; Rudistae; Mosasaurus.-Underlies the prairies. IV. RIPLEY GROUP, CON.-Hard, crystalline, white limestones (generally somewhat sandy and often glauconitic), underlaid by black or blue micaceous marls, whose fossils are in an admirable state of preservation. Prominent among the latter are Cardium Tippanum and Spillmani, Cucullæa capax and Tippana, Gervillia ensiformis, Siliquaria biplicata, Dosinia densata, Crassatella Rip- leyana, Baculites Spillmani and Tippaensis, Scaphites Iris—also Scaphites Conradi, Ammonites placenta, a large Atletha? with sharp revolving costae, and others. The fossils of the hard limestone differ in some respects from those of the marl. These strata form the Pontotoc Ridge in Mississippi, and Chunnenugga Ridge in S. E. Alabama; according to late researches by Conrad, they also exist at Eufaula, Ala. I. THE EUTAW GROUP. ("LOWER CRETACEOUS" OF TUOMEY.) 101. The territory indicated on the map (by the olive green tint) as being occupied by this formation, offers no strikingly charactistic features. By far the larger portion of its surface is thickly covered with the strata of the Orange Sand, from which the upper, sandy members of this group are often distinguished with great difficulty -it being some times, in fact, optional with the observer, as to which view of their age he may choose to take (T38-39). It is even so, at times, with the laminated clays found in the region, which characterize the lower portion of the cretaceous deposits as well as those of the Orange Sand. Usually, the fat, compact, bluish laminæ of the cretaceous clay (popularly called " Soap- stone"), are sufficiently distinct in their aspect and touch from the more sandy, and commonly micaceous, clay deposits of the Orange Sand; and in almost all cases there is one available mark of distinction: the ferruginous selvedges and stratification lines of the cretaceous clay, are yellow (hydrated peroxide) while those of the Orange sand are almost uniformly red (anhydrous peroxide.) These 7 T102] OUTCROPS OF THE EUTAW GROUP. 63 clays form the water-shedding strata of the region; they are, therefore, frequently struck in wells, and numerous springs running off from their surface, have their basins dug into them by the inhabitants. clay with reference Spring (Grisholm's 102. In Tishomingo county the cretaceous clay is most character- istically developed near the eastern edge of the region, and in many localities overlies the carboniferous rocks, on which we occasionally find its outliers for 8 to 10 miles eastward. The section at Mc- Douglas' mill (187) shows the position of this to the carboniferous formation; near Bay Factory) and in several localities N., E. and S. of the same, it overlies the carboniferous sandstone. Its laminae, in these locali- ties, are usually separated by thin layers of sand, or, more rarely, of mica. The sandy ingredient increases as we advance westward (therefore towards higher strata) and northward from the line between TT. 4 and 3; and near to the line of the Tombigbee Sand Group, we more commonly find yellowish or gray sands with but here and there a lamina, streak or lenticular mass of dark colored clay. Diagram No. 4 is a specimen of the stratification usually exhibited in these cases, from an outcrop on the heads of Little Browns Creek, Tishomingo county. བ་་ Stratification of the Eutaw Group. a, greenish-yellow sand. b, blue and gray laminated clay. These yellow and gray sands, which eventually become micaceous and calcareous, form the transition into the fossiliferous Tombigbee Sand; still, sands precisely similar are found interstratified with the characteristic Eutaw clays, so that the line between the two groups is necessarily somewhat arbitrary. 64 [¶103, 104 GEOLOGICAL REPORT. 103. The point furthest N. at which clays distinctly bearing the character of this group have been found, is in wells near Honey's Mill on Yellow Creek, about S. 18, T. 3, R. 10 E.; further N. the Orange Sand strata either conceal the older formations, or the non-fossiliferous, yellowish sands are of so indefinite a char- acter, that I have been unable to determine their age and position. Southward of this locality we find (besides those mentioned) characteristic outcrops of laminated clay at Mr. Hubbards, S. 27, T. 3, R. 10 E.; at Cartersville; at Peden's Mill, S. 9, T. 5, R. 10 E., Lindsay's Mill, S.-1, T. 6, R. 9 E., and Gurley's Bridge, S. 14, T. 6, R. 9 E., above Grisholm's Factory-all on Mackay's Creek; at Hutchins' place, S. 7, T. 5, R. 11 E. On the waters of Little Brown's Creek, on S. 9, T. 5, R. 9 E., and at Taylor's Mill, S. 10, T. 5, R. 9 E. Also, 1 mile E. of Marietta, Itawamba county. • At other points in Tishomingo, nearer to the line of the Tombigbee Sand, we find bluffs of non-calcareous, yellowish sands with only occasional bands of dark colored clay-thus at Haygood's place, S. 8, T. 5, R. 10 E.; at Tims' place S. 3, T. 5, R.´9 E., and at Moore's, S. 30, T. 6, R. 9 E. A few miles further W., on Big Brown's Creek, we strike the calcareous Tombigbee Sand. Yet even on the territory enclosed on all sides by clay outcrops, deep wells sometimes strike nothing but sand, similar to that at Tims' place, and bluffs show the same material. The blue or black laminated clays are found, as has been stated, in many localities in the southern portion of the carboniferous territory of Mississippi. It is very commonly struck in wells in TT. 5 and 6, RR. 10 and 11 E., at a depth of 20 to 30 feet. 104. Outcrops of laminated clays alternating with sand occur with frequency on Mackay's Creek, from Bay Spring down to its mouth, in Itawamba county. One of these, on a "caved" hillside, at Warren's mill, of which a section is given below, is of unusual interest on account of the fossil remains of trees which it contains, in the shape of lignitized trunks, obscure impressions of leaves, and lumps of fossil resin. The lignitized trunks being copiously incrusted with iron pyrites, induced a company of Georgians to commence mining operations on this spot, by driving a gallery into the lower, lignitic stratum; the work, however, was soon abandoned. ! T104] EUTAW GROUP IN ITAWAMBA, (Sec. 3.) SECTION AT WARREN'S MILL, ITAWAMBA COUNTY. FEET CHARACTER OF STRATA. 65 NO. 1 40 Wooded hillside-Orange Sand on top. 7 4 Yellowish sand resembling that commonly overlying the laminated clays; possibly in secondary place. 6 4 Sand similar to the above, filled with compressed lignitized trunks, often covered with pyrites. 10 5 0- -0 Lignite & nodules of brown hematite, in ferruginous matrix 4 5 Dark colored, greenish, sandy clay, with an irregular, 3 twisted or nodular stratification. 2-2 Yellowish-green sands, micaceous. 6 2 Thin layers of sandy, green, bluish, red or gray clay, interstratified with greenish sand. Lignitized trunks 1 with pyrites imbedded in the mass. The lignite found here is very much decomposed, so as to afford little hope of identifying the species of the trees. Not uncommonly there are found among the lignite rounded masses of fossil resin of a grayish yellow tint, with bands more or less translucent, resembling agate. It is very brittle, and when rubbed. emits a faint aromatic odor. The latter, as well as the aspect of the material, strongly reminds one of hardened sweet gum or Styrax liquida. A portion of a disc-shaped mass of this substance, which originally was about four inches in diameter by 1½ in thickness, was presented by Mr. J. C. Reinhart. The characteristic fat laminated clay does not occur in this section; it appears, however, in the bed of the creek, lower down, and in bluffs on Big Brown's Creek, E. of Marietta. Thence southward, however, we find exhibited in many localities on the Tombigbee River, down nearly to the Monroe line, strata of the same character as those just described, viz: consisting of alternating layers of sand and clay of variable thickness, from 0.1 of an inch to 2 inches, and more. Such are the outcrops on the Tombigbee, near Fulton, from which numerous mineral springs flow, and also those at Van Buren; at the latter place, there intervenes between the upper sandy portion and the more clayey beds below a thin ledge (1 to 2 inches) of fine grained, brownish alum.nous sandstone. R-5 • 66 [T105, 106 GEOLOGICAL RÉPORT. 105. I have not observed any outcrops in N. E. Itawamba except those men- tioned on Mackay's Creek Orange Sand strata occupy the surface altogether. Gray or black laminated clays, however, with occasional hard ledges, and iron pyrites, are struck in the wells at depths varying from 30 to 60 feet, all over the region. On Bull Mountain Creek, however, there are numerous outcrops of the möst characteristic kind, and on the dividing ridge between that creek and thé Tombigbee, S. E. of Van Buren, the bluish-gray laminated clay is common both in outcrops and in wells. While in S. E. Itawamba the formation is pretty well and characteristically developed, E. Monroe is almost entirely covered with Orange Sand strata of great thickness, in which the lignitic clay strata of the Eutaw Group appear only in rare and small patches, while wells generally terminate in clays of the Orange Sand character. The only outcrops I am acquainted with in Monroe county, E. of the Tombigbee, lie between Weaver's Creek and the Little Sipsie. Outcrops of black, fetid, lignitic clay appear on hillsides, and even on a few hilltops, on SS. 23, 24, and 19, T.. 12, R. 17 W., and are very generally struck in wells in the region mentioned. In one of these, dug about 1 mile W. of the Sipsie, in the last tier of sections of T. 12, a bed of lignite and iron pyrites was struck, rendering the water offensive-as is mostly the case where these clays come in contact with it. Along the channel of the Tombigbee, however, we can trace the Eutaw Group in occasional outcrops, into Lowndes county, and thence, through the bored wells, into Alabama. 106. At Coulter's Ferry, on Old Town Creek (near its confluence ce with the Tombigbee), S. 34, T. 10, R. 7 E., Monroe county, there is a bluff about 120 feet high (from the water level), consisting of grayish-yellow, stratified, non- effervescent sand, which has "caved off" in terraces down to the waters edge. It is sharp, contains very little mica, but a great many black particles (tourmaline?), and is occasionally cemented a little, by a ferruginous cement. Not unfrequent- ly, small lenticular masses and thin layers of gray laminated clay cccur in this sand, which often impart to the latter a laminated structure discordant with the stratification lines. On the whole of this fine exposure, however, not a trace of fossil remains of any kind is to be seen. Passing on westward from the ferry, for a mile, to Mr. Lisby's, S. 33, we find the continuation of the ridge which forms the Coulter's Ferry bluff, capped with the Rotten Limestone of the prairies; and in the ravines of a branch tributary to Old Town Creek, we obtain the following section : : 60171 9107] 301 EUTAW GROUP 80 67 MINITA (Sec 4.) (⠀ IN JAN 13 1Ɔ MOLTʊkba SECTION AT LISBY'S, SHOWING THE RELATIVE POSITION OF THE ROTTEN LIMESTONE AND EUTAW GROUP. FEET. CHARACTER OF STRATA. 10 30 to 40 f ' Rotten Limestone hilltops, with Exogyra costata, Janira 5-costata, Radiolites, etc. The lower ledges sandy and 3 micaceous. Coulter's Ferry sands; non-effervescent. In the lower portion of the bed, large round concretions (3 to 4 feet in diameter) of calcareous, non-fossiliferous sandstone, usually very hard, sometimes soft, 3 Dark colored, bluish, laminated clay. The laminated clay appears at the same level at which, a short distance off, we see only sands; showing that on the large scale as well as on the small, these deposits may be incontinuous, lenticular masses. These outcrops are precisely analogous to those described by Tuoméy (First Report, p. 118 ff.) as occurring at Finchs Ferry, near Eutaw ; save in this, that here as elsewhere in Mississippi, these sands are non-fossiliferous. A mile above Cotton Gin Port, at the ford, we find the Coulter's Ferry sands outcropping in the bed of the river. At the place itself, on the river bank, the laminated clay crops out two feet thick, overlaid by yellowish sand, beijo:T 107. Thence down to Aberdeen, and so far as I know, from Aberdeen toui Barton, on the Tombigbee, the Tombigbee Sand Group occupies the river bluffsy: The sands and clays of the Eutaw Group are, however, struck in the boredit wells at Aberdeen, and (at depths corresponding pretty accurately to a dipofu 25 feet W per mile) in those at Pikeville and Buena Vista, Chickasaw county. In some of the Aberdeen wells, a bed of white pebbles 8′ feet in thickness has i been found overlying a black, fetid, lignitic mass, at the depth of 217 to 220o feet; pebbles are mentioned by Tuomey as forming part of these strata in i Alabama, also. The lenticular or wedge-shaped laminæ of the clay are some- times exceedingly troublesome in boring, as their smoothness imparts to them an uncontrollable tendency to slip sideways. At Barton bluff, we find the following section: 68 .. [108 GEOLOGICAL REPORT. (Sec. 5.) SECTION OF CRETACEOUS STRATA AT BARTON, LOWNDES CO. 1 FRET. INCHES. CHARACTER OF STRATA. Calcareous sand, micaceous, with oysters, Inoceramus, 15 Janira quinquecostata, Placuna scabra, etc. 6Indurate ledge, with Inocerami. Calcareous sand, as above. Indurate ledge, a calcareous conglomerate of sand and 16 shark's teeth and jaws, partly water-worn. Also, black 3 concretionary pebbles. Calcareous sand, as above. 3 2 Gray and reddish laminated clay, interstratified with greenish sand. The prodigious number of shark's teeth and fragments of shark's jaws found in the lower indurate ledge (belonging to the Tombigbee Sand Group) is a remarkable feature of this outcrop. The lowest stratum is lithologically undis- tinguishable from the same at Warren's mill (104, Sec. 3), but contains only obscure traces of lignitic matter. 1 I am not aware that the Eutaw Group is exhibited in any outcrop S. of this, in Mississippi. At Columbus, it is struck after passing through about 100 feet of sands more or less micaceous and calcareous; the borings show the material to consist of layers of bluish or gray, and reddish clay, interstratified with sand. II. THE TOMBIGBEE SAND GROUP. 108. The surface of the territory occupied by this group (indi- cated on the map by the dark green tint) is generally characterized by sandy hills, capped with the Orange Sand strata. We there- fore perceive quite a sudden change in passing we: tward from it to the territory of the Rotten Limestone, with gently undulating 4 51 6 NO. T109] TOMBIGBEE SAND GROUP. 69 surface and heavy soils; while towards the territory of the Eutaw Group little difference is noticable, beyond that in the well waters. The prevalent and characteristic material of this Group, as has been stated, is a fine-grained micaceous sand, more or less calca- reous, usually of a greenish tint, but not unfrequently gray, bluish, black, yellowish and sometimes even orange red. Clays and non- calcareous (as also at times non-micaceous) sands are also found, although generally they are only subordinate to the characteristic greenish sand, which is the exclusive material in the southerly region of development, in S. Monroe, and Lowndes. In N. Tisho- mingo, there is a considerable variety of materials, among which bluish black clayey sands or sandy clays, and sands variegated with blue and yellow (frequently non-effervescent, but always strongly micaceous) are prominent. In S. Tishomingo, however, on the waters of Big Brown's Creek, the materials are undistin guishable from those prevailing in Lowndes county, like which they contain indurate ledges at short intervals. Near to the edge of the Rotten Limestone, however, and partio- ularly where they immediately underlie the latter, these sands are mostly loose and water-bearing, and light colored. In Itawamba, outcrops of their strata are scarce, their presence being recognized chiefly in wells; from Aberdeen down to several miles below Columbus, however, it forms the main mass of the river bluffs. The greenish tint is imparted to these sands not by greensand grains, as is the case in the marls of the Ripley Group, but is caused by a greenish incrustation covering thinly a portion of the quartz grains. Whether or not this incrusta- tion is of a glauconitic nature, I have thus far been unable to determine. 109. Beginning at the north, in T. 1, R. 9 E., Tishomingo county, we occa- sionally find in the (dug) wells a black, fetid, micaceous, non-effervescent clayey! sand, while natural outcrops scarcely occur; the same is the case in T. 2, R. 9 E., and the adjoining portions of T. 2, R. 8 E.-a hilly, sandy region, thinly settled, except along the water courses; the surface of which is covered with Orange Sand strata, beneath which, at depths varying from 4 to 20 feet, the cretaceous strata are struck. It is in this region particularly that the denuda- tion which the latter have experienced, previous to the deposition of the present surface materials, becomes very apparent, from the fact that the dark colored : sands are struck at the same average depth on the hilltops as on the hillsides. This condition of things is abundantly illustrated in the R. Rcuts of the region, a section of one of which, on Harris' contract, S. 3, T. 3, R. 9 E., has been · given in connection with the Orange Sand formation (739, Diagram No. 2). · 70 [T110 GEOLOGICAL REPORT. LOUP The black, micaceous sandy clay forming the subterranean hills, is generally found everlaid by micaceous sands variegated with blue and yellow spots, which are sometimes stratified inconformably, as shown in the figure, and then pass. imperceptibly into the overlying Orange Sand; at others they are obviously in their original place, conformably stratified, with an occasional ledge of dark colored clay, as illustrated in the section given below, from a hillside cut on Bell's contract, S. 33, T. 2, R. 9 En V (Sec. 6.) SECTION AT BELL'S CONTRACT, M. & C. R. R., TISHOMINGO CO. · t FEET. INCHES. CHARACTER OF STRATA. *ON- fi'w Blue sand, with yellow streaks, horizontally stratified 20 containing large nodules composed of many ferrugin- 4 ous layers, with a nucleus of gray sandstone in the ecentre; often containing cretaceous fossils. 25 A بتي 10 Black, sandy, micaceous clay, 3 Bluish and whitish sand with yellow streaks, with several ledges of ferruginous sandstone.. Also ferruginous 2 modules similar to the above. Stratification horizontal. Black sandy micaceous clay. Bottom of cut. 1 The nodules mentioned above, and also occurring in the variegated sand of Diag. No. 2, are sometimes several feet in length by 12 to 18 inches diameter. The sandstone nucleus, which itself is generally filled with loose sand, is often quite insignificant compared with the numerous rinds of ferruginous cement which inglese it. The fossils it contains are poorly preserved; fragments of a Callianassa, an Avicule ? and Gervillia were recognized among them. The black micaceous mass is poor in fossils also; those occurring are generally pyritized nuclei, among them Venilla Conradi, and a Siliquaria. The laborers in the cuts were sometimes severely affected by the fetid exhalations of the "black dirt," while working in ityfuldt, ashperbe, da 110, Sands similar to those overlying the black strata here, are found in wells and loutcrops on Yellow Creek waters, in T. 3, R. 8 and R. 9 E. On S. 29, T. 3; R.-95lja silver mine was said to have been discovered, not many years ago, in? these sands, where they form the bed of a creek. It appears that the proprietor of thodand, wishing to sell out, tried to enhance its value by shooting granulated silver, from cooins, into the bank. The trick did not "take" well, however, and he Logother country shortly after. Frauds of a similar character have been “' epeatedly practiced by strolling miners; in E. Tishomingo; usually, however, } 287.1 T1111 1 TOMBIGBEE SAND. IN TISHOMINGO. 71 based upon the presence of iron pyrites. It was in the same formation, but mainly in the black micaceous sand, that several Georgia miners sunk a shaft near Mr. Odum's, S. E. of Jacinto, S. 29, T. 4, R. 9 E.; after finding a great deal of iron pyrites, at 60 feet they struck yellow sand (belonging, perhaps, to the Eutaw Group), and abandoned the "mine." The following section, from a cut on Polk's contract, Mobile & Ohio R. R. (about S: 36, T. 2, R. 7 E., near the crossing of the Farmington and Danville road) furnishes an example of the variety of materials sometimes found in the strata of this group: (Sec. 7.) SECTION FROM POLK'S CONTRACT, ON MOBILE & OHIO R. R., TISHOMINGO COUNTY. LOT • FEET. CHARACTER OF STRATA. 3 White, stiff calcareous clay, with Exogyra, and Gryphæa to NO. 4 4 mutabilis. 8 Orange colored sand, with tubular concretions, resembling to 3 12 Orange Sand. No fossils found. 3 Blue, clayey, micaceous sand, with Venilla, Cucullæa, etc. 2 3 Bright green, fossiliferous sand. Bottom of cut. 1 The materials underlying No. 4, (the equivalent of the Rotten Limestone), are non-effervescent. The stratification in the cut is very irregular, from the great variations in the thickness of the strata. Numerous beautifully preserved nuclei (interior casts) of bivalve shells have been found in excavating this cut, but very few have come into my possession. Among those seen, Venilla Conradi, Crassatella, Trigonia, Cardium and Cucullaea were conspicuous. Sharks teeth, those of Mosasaurus, and an impression of a fish, have been found here, but in which stratum I was unable to ascertain. 111. At Jacinto, highly micaceous, black clayey sand is struck in most wells at depths varying from 10 to 15 feet, its thickness being 7 to 8 feet; then light colored sands with freestone water. In the public well, however, a ledge of indurate, limy sandstone was struck at 40 feet. The same phenomena obtain with little changes, all over T. 3, RR. 8 and 9 E.; N. E., and westward of Jacinto, the hilly surface is occupied by Orange Sand of greater or less thickness. The same dark colored micaceous material, more or less calcareous, and with obscure casts, occurs on the M. & O. R. R., on King's Creek, S. 26, T. 4 72 [T112 GEOLOGICAL REPORT. R. 7 E., and in dug wells on S. 33, T. 4, R. 9 E., on the heads of Little Brown's Creek. Further S., however, as well in the middle of the belt, on Big Brown's Creek, the character of the material changes more and more to that of the common greenish micaceous sand, which further S. alone characterizes the group. It is thus at Boyer's mill (about S.*27, T. 5, R. 7 E.), where the material could hardly be distinguished from that of the Columbus bluff; and at Hare's mill on Big Brown's Creek, S. 10, T. 5, R. 8 E., where we obtain the following section : (Sec. 8.) SECTION AT HARE'S MILL, BIG BROWN'S CREEK, TISHOMINGO CO. () () FEET INCHES. 14 CHARACTER OF STRATA. Grayish-yellow, micaceous, loose, non-effervescent sand; fossils in the middle 5 feet. NO. ON 4 1 Greenish sandstone, with Exogyra and Inoce- 3 ramus. 15 Greenish, micaceous, coherent, effervescent sand, with Inoceramus, Placuna scabra, &c. 2 1 1 Greenish sandstone, with Exogyra and Inoce- 1 ramus. Ledge No. 1 of this section forms the bed of the creek here, and for some distance around the same appears in the branches. On S. 30, T. 4, R. 9 E., about 4 miles N. E. of the locality just mentioned, on a very high ridge, we find a ledge 18 inches thick, of black micaceous clay, containing cretaceous fossils, underlaid by the non-effervescent sands of stratum No. 4 of the above section, overlaid by 6 feet of reddish sandy clay, and blue sand.—The sand in question forms the main mass of the ridge, and the section recalls to mind that given above from Bell's contract (T109, Sec. 6). Sections similar to that at Hare's mill, frequently occur on the waters of Big Brown's Creek, down to the Itawamba line, both in wells and on the bluffs of streams, which very commonly flow on the indurate ledges of greenish calcareous sand. On S. 8, T. 6, R. 8 E., a section of about 60 feet occurs on a washed hillside, where large blocks of the greenish micaceous sandstone are seen. 112. On Okalilly Creek near Carrollville, S. 22, T. 6, R. 6 E., there is a bluff 30 feet high, the lowest 20 of which exhibit the cretaceous strata, to-wit: 6 feet of blue and yellowish, non-effervescent, micaceous sand, forming the bed of the creek, overlaid by about 14 feet of whitish calcareous strata stocked with [113] TOMBIGBEE SAND-ITAWAMBA-MONROE. 73 oysters and other fossils of the Rotten Limestone; the material in the lower portion being rather sandy, but passing over by degrees into the Rotten Lime- stone above-none of which is seen E. of Carrollville. 113. The formations in N. W. Itawamba, I have but partially examined, and am not therefore certain of the line given there. The Rotten Limestone appears some distance E. of Guntown Station on the M. & O. R. R., and seems to touch 20 Mile Creek; at Guntown, nothing but the limestone is seen in either cuts or wells. E. of Richmond, on the Fulton road, on the waters of the Bogue Eucaby, and eastward of the same, strongly micaceous sands appear in the wells, which at first have limy water, but the less so as we approach the Tombigbee. Near Borland P. O. (Squire Connel's, S. 18, T. 11, R. 8 E.), bluish micaceous sand, sometimes cemented into a soft sandstone, is found in wells and beds of creeks. A few miles westward, however, the heavy "beeswax hommock” soils of the Rotten Limestone appear on the higher ridges, and shortly after, the latter itself is struck in wells and outcrops. At Coulter's Ferry (T106, Sec. 4), the Tombigbee Sands are sparingly represented by a few feet of micaceous material underlying the Rotten Limestone; and between this and Aberdeen, micaceous sand is struck in wells on the W. bank of the river, after passing through the Rotten Limestone. Near Aberdeen, we find the stratum finely developed in a bluff on the Tom- bigbee river, on Dr. Tindall's land: (Sec. 9.) SECTION ON THE TOMBIGBEE, AT DR. TINDALL'S, NEAR ABERDEEN, MONROE COUNTY. FEET. CHARACTER OF STRATA. 15 Orange Sand-Hilltop. 12 25 Non-effervescent vareigated sand, corresponding to No. 4, at Hare's mill and Bell's contract, Tisho- mingo. Greenish micaceous sand, becoming the more calcareous, the further downwards; with Exogyra, Placuna scabra, Ammon. Delawarensis (?), Baculites, Inoce- ramus. Fossils badly preserved. ON 3 2 7 to 8 Non-effervescent, variegated sand, with tubular, anas- tomosing, ferruginous concretions, resembling cane roots; and small ledges of soft, non-effervescent sandstone, to waters edge. 1 At the Aberdeen Ferry, the micaceous sand crops out on both banks, up to 8 74 [114 GEOLOGICAL REPORT. feet above low water. About 3 miles W. of Aberdeen, there is a change from the leyel prairie country further W., to sandy hills, with some pine. ་ 114. On the road from Aberdeen to Columbus on the W. side of the Tombigbee, there is a change from the sands to the Rotten Limestone and back again, as indicated on the map; the aspect of the country varying accordingly.. The section at Barton has been given above (107, Sec. 5); a section similar to it in most respects, is mentioned by E. Q. Thornton, Esq., of the Alabama Survey, as occurring near Colbert's Ferry, below Barton. At Plymouth Bluff, we find one of the best and most characteristic exposures of the Tombigbee Sand Group, of which a detailed section is given below. It was early visited and its fossils collected and studied, by Dr. William Spillman, of Columbus, who possesses a fine collection of its fossils; a number of these have been studied and named by Tuomey, and are mentioned in the catalogue appended to the second Report on the Geology of Alabama (T258 ff); most of the fossils. marked "Columbus," "Lowndes county" and "Miss." are found at Plymouth Bluff. A catalogue of the fossils from this interesting locality, kindly furnished me by Dr. Spillman, is given in another place. (No. 10.) SECTION ON THE TOMBIGBEE, AT PLYMOUTH BLUFF, LOWNDES COUNTY. * FEET. CHARACTER OF STRATA. NO. ** * 3-4 Soil and disintegrated calcareous mass. 10 12 Sandy calcareous clay, bluish, with Ostrea plumosa and Inoceramus barabeni ?--equivalent of Rotten Limestone. 9 1-2 Hard calcareous sandstone. 18 12 Greenish micaceous sand, with great numbers of Exogyra costata; also Placuna scabra. 7 * () 1-2 Calcareous sandstone, with " cane root" concretions. 6 30 Greenish micaceous sand, slightly calcareous, poor in fossils. LO 5 () 3 1-3 | Seam of hard calcareous concretions, with Exogyra. 12 Greenish micaceous sand, as above. 1½ | Hard calcareous sandstone with Inoceramus. 10 Greenish micaceous sand. Bed of river. T1151 [15] COLUMBUS BLUFF-FOSSILS. 75 The greenish micaceous sands form the main body of the hills on which the town of Columbus stands, and of those of this region generally; the Orange Sand strata proper being rarely more than 10 to 15 feet in thickness on the ridges, and often entirely absent. Frequently, however, the oxidizing action of the atmosphere has tansformed the upper strata of the greenish sands. into. reddish or yellow, which, however, may generally be distinguished by their sharpness, and the casts of fossils they contain, though sometimes very sparingly and poorly preserved. Casts of Baculites are perhaps those most commonly oecurring, but the tubular anastomising concretions mentioned in the section at Dr. Tindall's bluff (q113, Sec. 9), are still more common, and are frequently met, with on the road from Columbus to Aberdeen. The bluff at Columbus, the highest portions of which are between 150 and 160 feet above low water level, consists entirely of these micaceous sands, more or less fossiliferous, of various shades of color, and with some indurate ledges. Sand precisely similar forms the bluff at Waverley; an analysis of the same is given below (†140). لے 1 t } L · 115. FOSSILS OF THE TOMBIGBEE SAND GROUP.-The list of fossils in Dr. Spillman's collection, given below, will furnish a better view of the fauna of this group, than I could, have derived from my own observations. So far as I ám able to judge from the limited amount of attention I have thus far been able to bestow on the paleontology of the cretaceous formation, Dr. Spillman's collec- tion represents correctly the fauna of the peculiar and prevalent facies of the green micaceous sands, from Lowndes county to Big Brown's Creek in Tisho- mingo. The subordinate facies of the black sands, however, which we find in N. Tishomingo, presents some differences of character, which may be observed for instance, in the rare occurrence of Cephalopods, and of the prevalent' : characteristic fossil of the cretaceous-Ecogyra costatu; while on the other hand, the bivalve genera Venilla, Cardium, Isocardia?, Crassatella!, Solen, Gervillia!, and others, which are wanting at Plymouth Bluff, are prevalent. There seems to exist a close stratigraphical and lithological connection, however, between these black micaceous clays and the unquestionable Tombigbee Sands; otherwise the former might be suspected as representing the fauna of the Eu- taw Group. Perhaps an opportunity might occur in Alabama of comparing. the fauna of the Eutaw beds, with that of the black sands of Tishomingo. As it stands, the latter appears to offer more analogy to the fossils of the Ripley Group, than to those of the Rotten Limestone; to which otherwise, the fauna of the Tombigbee sands bear a close relation. " As regards the occurrence of the Tombigbee Sand Group in Alabama, the sections on the Alabama River given by Mr. Thornton (Second Report, Appen- dix 2, A) seem to demonstrate its existence there, although these strata do not appear to have been identified by Tuomey with those of Plymouth Bluff. • [For the catalogue of Dr. Spillman's collection of fossils from the strata of this group, which was not completed in time for insertion into the text, see Appendix No. I.] i 76 [T116. GEOLOGICAL REPORT. III. THE ROTTEN LIMESTONE GROUP. 116. The general character of this formation in Mississippi va- ries little from that given by Tuomey and others to the same strata in Alabama. The surface of its territory is generally level or but slightly undulating; when high ridges do occur, their main mass is the limestone itself, on which the Orange Sand formation is want- ing, or present only to an inconsiderable thickness, or in patches; the surface formation being mostly stiff clays, which underlie the prairies. Hence a great dearth of naturally available water dur- ing the dry season, characterizes the region in an economical point of view. The material of the formation itself is of great unifor- mity-a soft, chalky rock, of a white or pale bluish tint, with very little sand; consisting of variable proportions of fat, tenacious clay, and white carbonate of lime in crystals extremely minute, and with some shells of infusoria. The stratum is of great thickness and uniformity of character on its southwestern border, borings of 700 to 1000 feet being no uncommon occurrence in S. Chickasaw, E. Octibbeha, Noxubee and N. E. Kemper. In consequence of its dip, the stratum here thins out northeastward further N., eastward; but besides, there is a general thinning out to the northward, so that in S. E. Tippah, the maximum thickness is only about 350 feet, at Blackland, in Tishomingo county, 150, and on the Tennessee line, from 70 to 100 fect-perhaps much less. At the same time, in this northern portion of its territory, its materials lose their uniformity, consisting at times of white or bluish, tenacious, calca- reous clay-called by the inhabitants, from its massy cleavage, "joint clay”—alternating with strata of the common "Rotten Limestone," and sometimes-though rarely-with layers more or less sandy. Its lowest portions, where it adjoins the Tombigbee sand strata, are generally white clayey sands-as at the outcrop on Okalilly Creek (T112), and stratum No. 10 at Plymouth Bluff, (T114, Sec. 10). Among its fossils, those rarely wanting in any of its outcrops, are Exogyra costata, Gryphaea mutabilis, con- vexa, incurva, Pitcheri, Placuna scabra, Janira quinquecostata. The occur- rence of the Gryphaeae, of Ostrea falcata, of Radiolites, Ichthyosarculites, and Belemnitella mucronata, which appear to be wanting in the Tombigbee sands, form prominent and convenient palaeontological marks of distinction from the latter group; [the Gryphaeae do, however, occur in the Ripley group also.] The species of the genus Inoceramus (numerous in both) also afford convenient landmarks, altho' I have not thus far determined them specifically. 7117, 118] ROTTEN LIMESTONE-LOCALITIES. 77 117. Where the Rotten Limestone appears on the surface, or is covered by pervious strata, it appears white or yellowish-white, and generally preserves the same tint to some depth, varying with the perviousness of the mass, from 2 to 18 feet. Below this there is often a very marked change of color into bluish gray, which when wet looks quite dark and is therefore very commonly distinguished as "blue rock" from the "white prairie rock" on or near the sur- face. The rock is the same, however, both in composition and fossils, the dif- ference of color being caused merely by the oxidation of a trace of carbonaceous matter, or protoxide of iron, or at times both. This circumstance causes great difficulty in the study of the strata, where the records of well-borings have to be relied on for information, since both the Rotten Limestone and the dark colored clayey sands of the Tombigbee Sand Group are often indiscriminately styled "blue" or "black rock" or "dirt," by the well-borers and inhabitants, rendering their accounts extremely perplexing and apparently incompatible with any regular stratification. Fortunately, notwithstanding the general le- velness of the surface, outcrops are quite common in the Rotten Limestone re- gion; the channels of the creeks are often cut into the rock itself, and from its resistance to denudation, it has not formed so many rounded subterranean hills, but comes to the surface where a stratum ends, through the surface materials forming "bald prairies" and "bald hilltops”—in which the limestone is too the surface to allow of the growth of trees or other deep rooted plants, and not unfrequently forms white areas many acres in extent, strewn with fossils (especially oysters) washed out of the mass, and only here and there a patch of Verbena, or Cassia (C. obtusifolia, occidentalis, marilandica). 118. Localities of the Rotten Limestone group.-At Breuton's contract on the Memphis & Charleston R. R., near Chawalla Station, a cut exhibits about 17 feet of yellowish white calcareous clay, overlying a blue, micaceous, compact, clayey, slightly effervescent sand; near the surface of the latter, the calcareous clay contains abundance of Ostrea falcata; above, some Exogyrae and Gry- phaeae are found, but chiefly Inoccrami, Mytilus, Tellina, &c. This whitish, calcareous, "joint" clay occurs in numerous cuts between Chawalla and Cor- inth, and also E. of the latter place; the cretaceous strata being from 3 to 20 feet beneath the surface over the whole region, while N. of Corinth, in Ten- nessee, bald prairies strewn with shells are said to exist. At Farmington, the "blue rock" is passed through, into loose water-bearing sand, at 40 to 50 feet; at Corinth, at 70; while at Mr. Tate's, S. 7, T. 1, R. 7 E., in Tennessee, N. of Chawalla, a bore of 356 feet did not strike any loose sand, but seemed to con- tinue in the unchanged "blue rock." Due S. of this, also, near Bone Yard and Kossuth, and on the E. half of R. 6 E. down to T. 5 generally, wells are very deep, and outcrops very scarce; I have been unable to ascertain how much of the "blue rock" belongs to the Rotten Limestone, and how much, if any, to the Tombigbee Sand Group, which the dark micaceous material seen at Breuton's contract resembles exceedingly. On Parmeechee Creek, S. 33, T. 2, R. 6 E., there is an outcrop of very micaceous, sandy marl, the shells of which (very imperfectly preserved) seem to place it within the Ripley group; between . GEOLOGICAL REPORT. 119, 120 : 90 (2 ! which and the Rotten Limestone there appears to be a zone of transition, char- acterized, among others, by the frequent occurrence of hard ledges of conglo merated shells, and of Baculites gigas, while having some shells in common with both groups. Outcrops of this character on the upper. Hatchie and од Old Town Creek, will be described under the head of the Ripley group (T134.) Near (W. and N. W. of) Danville, Tishomingo county, bald prairies are said to occur The occurrence of the white "joint clay" at Polk's cut has been mentioned (110, Sec. 7.).. 119. At Boone's cut, S. 16, T. 5, R. 7 E., on the Mobile & Ohio R. R. (about 3 miles N. W. of Boyer's mill-111) a section of about 60 feet is obtained in the cuts and branches. In the cuts, the white, calcareous "joint clay," teeming with Gryphaea mutabilis, is underlaid by "blue rock," but there is no stratifica- tion line between; the "joint clay" conforms to the surface of the hills, and every stage of transition from the one to the other may be traced, showing that the difference in aspect is owing to atmospheric influences. Still further down- ward, the "blue rock" passes over into a blue, micaceous, non-effervescent sand similar to that on Okalilly (T112). Such, probably, on a larger scale, is the succession of strata in the deep wells mentioned in R. 6 E.-A few miles W. of Boone's cut, bald prairie hilltops appear, with abundance of shells. * At Mr. William Yates', S. 11, T. 6, R. 6 E., bald prairie spots are common, and clusters of Gryphaeae cemented by calcareous sand (similar to that of the upper stratum on Okalilly—¶112) were taken out of his well.. Both the localities just mentioned are on the eastern edge of the Rotten Limestone region. Due W. of it, near Blackland, the characteristic rock appears abundantly in the beds of the creeks, and thence constantly on the road to Car- rollville; good exposures occur on Twenty mile Creek. 120., Due E. of Blackland there rises a high ridge, on the summit and in the ravines of which, the marl of the Ripley group appears, with its characteristic fossils. In T. 6, R. 5. E., Tippah county, the dividing ridge between the waters of. the Hatchie and Tallahatchie, and those of the Tombigbee, also forms the line. between the Rotten, Limestone and the Ripley Group; the former, or its equiv- alents, crop out with frequency on the creeks of the S. E. slope, especially on the main Tishomingo, and on Yoonaby Creek. On the hills in which these creeks head, there are numerous "bald prairie spots," on which Exogyra and Gryphaeae are lying about. A bluff on Tishomingo Creek, near Mr. J. H. Kennedy's, S. 14, T. 6, R. 5 E.; affords a remarkably fine opportunity for study; similar exposures are, found on the creek for several miles.-The bluff is about 60 feet high; a blu- ish, soft, somewhat sandy marl, the uppermost 8 feet of which consist of a ma- terial rather more clayey than the rest, of a yellowish tint, and very similar to the Rotten Limestone of the hilltops. Among its fossils, which are numerous. and well preserved, are Exoyyra costata, Gryphaea mutabilis and convexa, (incur va?), Ostrea falcată, O. cretacea?, Anomia argentea?, Placuna scabra, ፣፣ : $121, 122] ROTTEN LIMESTONE-PONTOTOC-CHICKASAW. 79 Belemnitella mucronata, Baculites gigas; numerous small Inocerami.-Not far from (N. W. of) this locality there is a well (Nelson's) 330 feet deep. Wells decrease in depth pretty regularly from here eastward to Carrollville, owing, however, not only to the dip of the strata, but also to the descent from the ridges on which these wells are situated. Lower down, Tishomingo Creek shows outcrops of the common Rotten Limestone, while the same material seen at the bluff near Kennedy's, crops out on the Yoonaby, on S. 10, T. 7, R. 5 E. The occurrence of the Rotten Limestone at Guntown Station, M. & C. R. R., has been mentioned. 121. It would be tedious to enumerate the numerous localities at which the rock crops out on the territory laid down on the map, since each one is little more than a repetition of the other. N. of Old Town Creek, Pontotoc county, prairie occurs only locally, in limited patches; S. of the stream mentioned we find the "Chickasaw Old Fields," called so probably from their resembling a clearing; they are nothing more than small prairies, in which the Rotten Lime- stone lies very near the surface, so as to be at times touched by the plow, while the rain-water also cuts its channels into it. Their soil is black, or whitish where the rock itself forms a large quotum of it, and very fertile; but that which results from its intermixture with the yellow soil of the adjoining, gently undulating uplands-"mahogany soil"-is preferred as being safer. Still further S, on the Coonewar, Chiwapa and Tallabinela, the regular prairies set in, with their 6 to 10 foot stratum of yellow clay overlying the Rotten Limestone; while the beds of the creeks usually cut into the latter.. In Pontotoc county, the western line of the Rotten Limestone region is generally pretty distinctly marked by the steep slope of the Pontotoc Ridge, on whose summit the strata of the Ripley group appear. Thus, on the road from Tardyville to Ellistown, a mile W. of the latter place; on the Relland and Camargo road, immediately W. of the crossing of the E. fork of Tallabinela Creek; on the Okalona and Coffeeville road, at the crossing of Chuckatonche Creek. W. of the points men- tioned, the country becomes hilly, dark tinted Orange Sand sets in, and bald hilltops on which the material is sandy, with fossils of the Ripley group, are seèn: 122. The Pontotoc Ridge terminates, or at least, loses its peculiar character between the Houlka and Chuckatonche, N. E. of Houston. At Houston, and E. and S. E. of the same, the cretaceous material struck in the wells is litholo- gically intermediate between the micaceous Owl Creek (Ripley Group) marl and the Rotten Limestone, and its fossils likewise indicate an intermediate position; for while the leading shells of both groups appear to be wanting, it does contain some of the fossils of each. At Houston, immediately on the edge of the Flat- woods, this stratum (as ascertained in wells) is about 100 feet in thickness, - being underlaid by water-bearing sand. At Sparta, S. E. of Houston, the same stratum is struck in shallow wells, and cisterns, but in deep wells no water is found at any depth less than 300, and S. of Sparta, 1000 feet is no uncómmen depth. Sparta is probably on the eastern edge of the transition stratum in question, for eastward of the place (around which, as at Houston, the country # 80 [123, 124 GEOLOGICAL REPORT. is but slightly undulatir g) there is a gradual ascent; we first strike several small Orange Sand ridges, then ascend a high one, on which Clear Spring P. O., (Dr. Kilgore's) is situated, and which divides the waters of the Houlka and Chuckatonche from those of the Tibby.-The general section of the cretaceous formation in this latitude (Fig. 2 of Tab. I.) will convey a better idea of the general structure of the country, than could be given in words. It was neces- sary, of course, to exaggerate the dips and elevations in this profile; hence the prairies, which to the eye seem level, here appear as a slope. 123. The western slope of Kilgore's ridge is thickly covered with Orange Sand, so that wells 70 to 80 feet deep are dug in the same, yielding freestone water. But as we approach the eastern slope, we observe on the hillsides a terrace gradually ascending, on top of which the Orange Sand appears thinner and finally disappears on the crest, on which, as well as on the eastern slope itself, to its foot, large patches of bald prairie, strewn with Exogyra and Gry- phaeae, Ostrea falcata and Placuna scabra, are of constant occurrence; they are frequently destitute of any soil whatsoever, appearing at a distance like fields of snow. This ridge preserves its S. E. and N. W. course, terminating at the S., where the Chuckatonche and Tibby meet; northwestward from Kil- gore's, it may be traced up to Houston, skirting on the W. a gently undulating tract of oak uplands. Cretaceous outcrops are abundant on its crest and eastern slope up to where Reed Creek breaks through it, in the N. E. corner of T. 15, R. 3 E.; beyond, few are to be seen-the ridge becomes lower, and termi- nates in the Flatwoods N. W. of Houston.-On the eastern summit of this ridge, a well has been bored by Mr. William T. Dexter, S. 16, T. 15, R. 4 Erg in which at about 500 feet he passed through the Rotten Limestone into ledges of hard rock alternating with water-bearing beds of loose micaceous sand with shells-probably of the Tombigbee Sand group. Similar beds continued up to 650 feet, several streams of water being struck, but without raising the water higher than 150 feet from the surface. When last heard of, the well remained at the above depth, but will, it is to be hoped, be further pursued, since accord- ing to the wells at Aberdeen, water would probably rise to within available dis- tance of the surface, whenever the beds corresponding to those which supply the Aberdeen wells should be reached, at 800 to 850 feet. This well is of some interest, as from its location on the highest point of the outcropping stratum, it is likely to afford reliable data in relation to its total thickness. 121. The prairies on the eastern slope of this ridge form part of the western branch of the prairie belt which, beginning in S. E. Pontotoc, as above men- tioned, extends its main body, (with scolloped edges, and an average width of about five miles) to the southward, between the Chuckatonche and Tombigbee- between whose waters it forms a dividing plateau-to Tibby Creek. The sur- face of the prairie has a gradual ascent towards the east, as may be perceived in the high hills and bluffs which skirt the Tombigbee on the W. side, and whose, highest points, generally speaking, are nearly on a level with the surface of the prairie. The western branch, (or rather perhaps succession of patches), which leaves the main body below Okalona, after crossing the Chuckatcnche and 1 125, 126] WATERS OF ROTTEN LIMESTONE-FOSSILS. 81 Houlka, rejoins the main body on the Oka Tibby, below Palo Alto, on the May- hew Prairie. South of the latter creek, the prairies, are distributed rather irregu- larly over the surface of the cretaceous territory, yet on the whole retain their character of dividing plateaux, between the Noxutee and Tombigbee, and the several confluents of these streams. They are largly interspersed with gently undulating uplands, whose soil is generally greatly inferior in native fertility to the prairie, and of a totally different character. It is on the outskirts, in these wooded portions, and on the streams, not in the prairie proper, that the Rotten Limestone most frequently crops out, forming "bald prairie spots." In all the larger bodies of prairie, the rock is covered with a stratum of heavy, pale yellow clay containing small round ferruginous concretions; on whose surface, by the addition of vegetable matter, the black prairie soil is formed, to the depth of 12 to 18 inches. The thickness of this clay stratum varies greatly -from 2 to 10, on the average about 5 to 7 feet. 125. That under these circumstances, both springs and sipe-wells cannot, as a general thing, exist in the prairies, may be readily imagined. The streams, while flooded during the rainy season and in fact, at every heavy rain, are dry during the greater portion of the year, unless indeed, like the Houlka, Tibby and Noxubee, their supply derives from beyond the prairie region. Hence the vast importance which the boring of deep, and partly artesian, wells has acquired in this region. Where these have not been obtained, cisterns are in general use, which are excavated into the Rotten Limestone, without any cement being required to make them hold water; for the rock is sufficiently impervious for all practical purposes. 126. FOSSILS OF THE ROTTEN LIMESTONE.-The larger streams, as may be supposed, have mostly excavated their channels into the Rotten Limestone, which appears at every turn, in localities too numerous to be mentioned, not only on the immediate banks, but frequently also on bluffs at some distance from the channels, whose summits are on a level with the prairie. The Noxubee River at Macon flows in a deep channel in the Rotten Limestone; the Houlka, Chucka tonche, Tibby, Scooba, and others, exhibit the same phe- nomena with frequency, and one outcrop is very nearly a copy of every other. The shells most commonly found have been mentioned above (¶116), besides which, Gryphaea vomer, Ostrex plumosa, O. cretacea, Ánomia argentea, Plicatula urticosa, a Lima (resembling Ctenoides acutilineata CON.) and two species of Pecten, flat, and finely ruled; together with shark's teeth, are among the more common. R-6 82 [127 GEOLOGICAL REPORT. In Noxubee and Kemper, however, there is one stratum peculiarly rich in fossils, and containing them chiefly as nuclei much harder than the mass of the rock and therefore in the best condition to be washed out, unharmed, by rains and streams. The mass of this stratum is rather more clayey, and softer, than is usually the case as may be perceived at an extensive exposure on a hillside E. of Wahalak Creek, where a stratum of gray calcareous clay, about 15 feet thick, is over and underlaid by the common Rotten Limestone. This clay stratum contains a fauna rather different from that usually found in the latter, approaching somewhat, in character, to those of the gray clay overlying the limestone of the Ripley Group(¶137); and the same as collected by L. Harper and myself, in 1855, on the bald prairies S. W. of Macon. It is characterized by the comparative scarcity of the usual oysters, (except Ostrea falcata which is very abundant), the absence of Janira 5-costata and the presence of numerous univalves. Natica petrosa, Natica sp., Pyrula trochiformis, P. Richardsoni, and several other species of Pyrula and Fusus, Pterocera sp., several Rostella- riae, Voluta cancellaria, Cerithium nodosum, Scalaria Sillimanni, Actaeon (Bullopsis ?) 2 sp. This great prevalence of univalves is very unusual, as is that of the bivalves whose nuclei are abundant here, viz: Crassatella, 2 sp.. Cucullaea vulgaris, C. ungula, Nucula 2 sp., Cardium sp., Lucina sp, Solen, Tellina, Astarte? sp., Clavagellideae, Hamulus Onyx ; and others. Besides the shells already mentioned, Placuna scabra, Plicatula urticosa?, Anomia sp., Ostrea pleumosa, cretacea?, and two other small undetermined sp.; Gryphaea convexx, Pitcheri, Exogyra costata, Ichtyosarculites cornutus, I. loricatus, I. quadrangularis, Nautilus Dekayi, Hamites torquatus, Turbinolia sp., teeth and vertebræ of Mosasaurus, teeth of Otodus appendiculatus, Corax appendicula- tus and Carcharias, were found here. · 1 The abundance and variety of fossils occurring in this locality, and no less the great prevalence of univalves, are very unusual in the Rotten Limestone of Mississippi. Unfortunately, with the exception of the oysters, little more than the interior cast of the fossils is usually preserved in this stratum, rendering identification difficult. In Alabama, according to Tuomey, this group of fossils is rather more commonly found. In the collection of the Alabama Survey at Tuscaloosa, there are several nuclei from the Rotten Limestone, of a Cardium closely resembling, if not identical with, Cardium Spillmani, CoN. It is observable at first sight, that the facies of the fauna of this stratum approaches very closely to that of the uppermost clay stratum of the Ripley Group (133, 137); although a close examination may demonstrate the species to be represen- tative only, and not identical. 127. The Radiolites (R. Aimesii and undulatus), though a very striking palæontological feature, are by no means common, and being a conspicuous fossil, those specimens which had been washed out of the rock on the bald prairies, early found their way to cabinets and private mantels-which is the only source from which I have as yet obtained them. The Ichtyosarculites,. likewise, are rare. 128] RIPLEY GROUP. 83 Very perfect impressions of fish have been found in several localities, mostly in digging cisterns; as at Camargo, Palo Alto, and Okalona. I have never been so fortunate as to obtain even a fragment of one. - Irregular, rounded nodules of iron pýrites, of a radiated structure, called "Saiphur Balls," are common throughout the Rotten Limestone, and sometimes cause considerable difficulty in boring wells, on account of their hardness, and tendency to divert the auger from the vertical. IV. THE RIPLEY GROUP. 128. The surface of the territory cccupied by this, the upper- most stage of the Cretaceous in Mississippi, is generally hilly, and to a great extent, thickly covered with the strata of the Orange Sand, which have filled up the gaps occasioned by fracture or de- nudation in the ridges formed by the upheaved strata of the group. Small prairie spots are met with in many localities, but usually on or around isolated hilltops or ridges, where some soft calcareous stratum has approached the surface. On these "bald prairie hill- tops," we often find in abundance the Exogyra costata and Gry- phaea mutabilis (G. convixa is less common), but associated with them are always nuki, at least, of fossils characteristic of this group. There are two materials especially, which in their various modi- fications, compose the strata of this group, viz: hard crystalline limestone, more or less sandy and glauconitic, which forms the highest strata; and bluish micaceous marls, more or less sandy, and often interstratified with subordinate ledges of sandy limestone, which latter become less and less frequent as we descend in the series towards the strata forming a paleontological as well as lithological transition into the Rotten Limestone. 1 In the uppermost, hard varieties of the limestone, the substance of the shell of fossils is generally replaced by crystallized, transparent calcareous spar, which often forms specimens of great beauty and perfection. Lower down, we often find hard nuclei, while the substance of the shell is soft and friable crys- talline matter, or at times, is altogether wanting, so as to leave the nucleus either loose, or fixed at some point, standing free within the hollow space, In the marls, on the contrary, the preservation of the substance of the shells is very perfect, since it has not been replaced by any extraneous matter, but sim- ply rendered friable by the decay of the animal glue. It generally exhibits, therefore, not only the finest details of structure, both external and internal, but even the iridescence of the mother-of-pearl is often beautifully preserved, so that the observer at first finds it difficult to convince himself that the beds 84 [T129, 130 GEOLOGICAL REPORT. before him have not, at a comparatively recent period, formed the sea-beach.* 129. In entering upon the territory of this formation from the west side (on which, in S. Tippah, Pontotoc, and N. Chickasaw, it is bordered by the flatwoods), there is a very striking change in the aspect of the country, which suddenly becomes hilly and broken, the hillsides coming down steeply into the valleys, and exhibiting outcrops of hard limestone, while the surface is covered with deep- tinted Orange Sand. Springs become abundant, and the growth of vigorous Black and Spanish ("Red") Oak and Hickory, intermixed with lime-loving trees like the Poplar (Liriodendron), Walnut, Butternut, Linn, Umbrella Tree (Magnolia auriculata) and Locust on the hills, and of the Sycamore, Honey Locust, Wild Plum and Red Bud in the valleys, indicates the change of soil., In some portions of Ponto- toc county, there is a pretty regular rise as we advance eastward from the flatwoods, the limestone strata, which at first were at the foot, gradually ascending to the top of the hills of the Pontotoc Ridge, until a sudden descent brings us down to the level territory- of the Rotten Limestone, at the E. foot of the ridge. Such is the case on the road from Rocky Ford via Tardyville to Ellistown, and on the Tocapola and Camargo road via Redland. The out- cropping ledges of rock there form the crest of the ridge, which runs parallel to the strike of the stratum. 130. The geological structure is not, however, always as simple as in the case just mentioned. Commonly, the rock strata fall far short of reaching the east- ern summit of the ridge; and the hills, lower, and less distinctly co-ordinated *See also T. A. Conrad "On a group of cretaceous fossil shells, found in Tip- pah county, Miss., with descriptions of fifty-six new species." Jour. Acad. Nat. Sc. Phila., n. s., Vol. 3, ¶323, ff.-Some of the fossils of the crystalline lime- stone were observed by L. Harper at Ripley, in 1855, but were by him accounted tertiary. Others were collected previously by Prof Wailes, on the bald hilltops of Pontotoc. In spring 1856, I explored the territory, and collected the fossils of the Ripley Group from the town of Pontotoc to the Tennessee line, and in autumn of the same year, its southern portion, from Pontotoc to Houston. Upon my information regarding these localities, Dr. William Spillman, of Columbus (whose splendid collection of fossils from the lower stages of the Cretaceous has already been mentioned), visited the Owl Creek locality in November 1856, and brought back a fine collection of its fossils; which he subsequently submitted to Mr. Conrad for description, there being then no prospect of anything being done with the collections of the Geological Survey. Great credit is due to Dr. S. for the energy and enthusiasm with which he has for years persued, during all his leisure hours, the study of the cretaceous formation of Mississippi. With the exception of a single locality (Kindrick's mill, visited by me in spring 1858), all the observations recorded here concern- ing this formation, are derived from ny field notes of spring and autumn 1856. T131] LOCALITIES OF RIPLEY GROUP. 85 into a ridge, are formed by the marl strata underlying the rock, capped usually by the Orange Sand. Such is the case in Tippah, in middle Pontotoc, and in Chickasaw county, N. E. of Houston. The Pontotoc Ridge is therefore, in fact, rather a belt of ridgy land, which is in several instances (Chiwapa, Chuckatonche) traversed by streams, though more commonly, it forms a “divide," between the waters of the Tombigbee and Hatchie on one side, and those of the Tallahatchie, Loosha-Scoona and Yallabusha on the other. Interstratified with the blue marls, and in some instances repla. cing them entirely, we find strata consisting of sandy limestone of various degrees of induration within its own mass, so that the action of water wears it into fanciful, often perforated forms, which have obtained for it from the inhabitants the names of "bored limestone" and "horse-bone limestone." It abounds in fossils, which are, however, generally preserved as nuclei ouly. 131. Localities of the Ripley Group.-The most northerly outcrop which I know to exist, occurs near Jonesboro, on S. 11, T. 2, R. 4 E., Tippah county. Here we find outcropping on the sides of a small valley, a ledge 12 to 15 inches thick, of hard crystalline limestone, somewhat sandy, with grains of greensand interspersed. Its weathered surface is covered with projecting fragments of shells, chiefly of a large Turritella (allied to T. Bauga D'ORB., and different from T. Tippina CoN. of Owl Creek), of Gryphaea v mer, a large Venericardia with flat radial costæ, and claws of a Callianassa. This rock is so hard that it has been used for millstones; a fine chalybeate spring issues from beneath the ledge. A soft ferruginous variety of it, into which it shows occasional transitions, is said to crop out on Muddy Creek. due W. of the locality mentioned, while half a mile E. of it, the soft shell marl was found in wells. At Mr. Wilhites, S. 27, T. 2, R. 4 E., a well was dug on a hill, at the foot of which the blue Owl Creek marl, with numerous fossils, crops out. The section thus obtained is as follows: 86 [T131 GEOLOGICAL REPORT. (Sec. 11.). SECTION OF STRATA IN WILHITE'S WELL, TIPPAH COUNTY. FEET. CHARACTER OF STRATA. 18 Clay and Orange Sand, 'ON ON 10 t t 18 Dark colored micaceous marl with Owl Creek fossils. 4 + + 0 0 3 Bored limestone with shells: Turritella and Baculites. 3 | Gravel and sand, with lumps of hard blue limestone. 3 2 33 Coarse siliceous sind, loosely cemented by lime, with disintegrated shells. 1 The Turritella in No. 3, is the same as that in the limestone near Jonesboro'. At Ruckersville, the effervescent shell marl is found in the wells. At Kindrick's old mill, on Muddy Creek, S. 9, T. 3, R. 4 E., we obtain the following section: (No. 12.) SECTION AT KINDRICK'S MILL, TIPPAH COUNTY. FEET. INCHES CHARACTER OF STRATA. 25 1 CO Yellow Sand, ill stratified. Orange Sand; or lignitic? Turritella limestone, with Gryphaea vomer, Ostrea crenulata? Callianassa, Baculites, Otodus appen- diculatus. 4 CO 2 Coarse glauconitic sand with disintegrated shells. No. 3 of Sec. 13. 2 t 20 † Dark micaceous marl with Owl Creek fossils, among which Scaphites Conradi, Baculites Tip- paensis, Crassatella Ripleyana, Nucula percrassa Dosinia densata, Ctenoides acutilineata, Meretrix Tippana, Legumen ellipticus, Siliquaria bipli- cata; numerous univalves. 1 Stratum No. 3 contains, besides the large Turritella already mentioned, a smaller species with two acute revolving costæ, found also at Ripley, and on King's Creek. NO. 132] RIPLEY-OWL CREEK. 87 From this S. to Ripley, the Owl Creek marl is frequently found outcropping in the branches tributary to the Hatchie, and in most wells. At Braddock's, S. 21, T. 3, R. 4 E., on Walnut Creek, the marl crops out without the overlying limestone; its thickness, as ascertained in wells, close at hand, is 18 feet--it is underlaid by yellow, water-bearing sand. 132. In the neighborhood of Ripley, there are numerous outcrops; the wells, also, have rendered the formation more accessible to study than is the case elsewhere. The general features of the outcrops may best be studied at an exposure in the S. portion of the town, at a bluff on the S. side of Tippah Creek, where we obtain the following section: (Sec. 13.) SECTION ON TIPPAH CREEK AT RIPLEY, TIPPAH COUNTY. FEET. INCHES 1-1 1-1- 25 1-1 CHARACTER OF STRATA. Concretionary ("bored”)Lim estone, with hard and soft ledges alternating; containing (sparingly) Exogyra costata, and numerous other, imper- fectly preserved shells, mostly nuclei ; through- out, in great abundance, a Ceriopora, which in the lowest, hardest ledges is associated with Turritellae and Gryphaea vomer. NO. 4 11 3 + 3 Coarse glauconitic sand with disintegrated shells. Seam of yellow, non-fossiliferous sand, Micaceous marl (Owl Creek) with Buculites, Legumen and Siliquaria. 3 2 1 + + Stratum No. 4 of this section is extremely variable, being frequently represen- ted by a soft yellowish-white, calcareous sand, often associated with a soft yellow limestone, teeming with corals (Ceriopora) and containing casts of shells with loose nuclei (¶128). It may be studied to advantage in several outcrops E. of Ripley, among others, at the bluff above the crossing of Owl Creek on the Ripley and Jacinto road. In several of these, as well as in others S. of Ripley on the Pontotoc road, it may be seen overlaid by a black micaceous material, more or less clayey, and containing a few poorly preserved shells. The locality on Owl Creek, 3 miles N. E. of Ripley, on S. 7, T. 4, R. 4, (first visited by me in May 1856) where Dr. Spillman's fossils were obtained, forms part of the bluff mentioned above, which contains on the west side of Owl Creek for several miles; at the point mentioned it affords the following section : 88 [133 GEOLOGICAL REPORT. (Sec. 14.) SECTION OF OWL CREEK BLUFF, NEAR RIPLEY. |-1 25 FEET. CHARACTER OF STRATA. Concretionary limestone, with Exogyra costata, Ceriopora and Turritella. Same as No. 4 of 2 preceding section, and No. 3 of Sec. 12. 1 + 20 Dark, bluish, micaceous marl, more or less clayey in its different portions, containing numerous fossils, 1 whose shells retain their natural iridescence. The uppermost 2 feet of the lower stratum, is particularly rich in bivalves, mainly Nucula percrassa, Crassatella Ripleyana, Meretrix Tippana and Dosinia densata, which frequently occur with both valves still in juxtaposition. Lower down Baculites are very abundant; they sometimes form beds 6 to 8 inches in thickne s and several yards in length, which when broken up, exhibit a dazzling play of intense rain-bow tints. Most of the fossils mentioned in the catalogue given below (excepting those marked with an asterisk) occur in this locality and are in the collection of the Survey; many of them being thus far undetermined. Outcrops corresponding to different portions of the sections just given, occur W. of Ripley for 2½ miles, when (on S. 28, T. 4, R. 3 E.), the soft yellow limestone disappears under the gray clays of the Lignitic, which also overlie it in the northern portion of the town of Ripley. The entire thickness of the calcareous strata overlying the water' earing sands, as ascertained in wells, is about 60 feet. 133. In S. Tippah, the same strata crop out on all the tributaries of the Tallahatchie, E of the line given on the map. One outcrop of the blue marl, at Col. Berry's, S. 4, T. 6, R. 4 E, is peculiarly rich in univalves, comprising many species not found on Owl Creek. The most common are Turritella Tippana and Athletr leiolerm; a large, beautifully sculptured species of Pyrula, and Tudicla perlatı also occur. On S. 23, T. 5, R. 4 E., at a church near Mr. Stubbs' place, there is an isola- ted cretaceous hill, surrounded on all sides by deep Orange Sand wells. At this spot, in a ravine, the following section obtains : NO. 134] SOUTH TIPPAH-PONTOTOC. (Sec. 15.) 89 SECTION OF AN ISOLATED CRETACEOUS HILL NEAR THE MEETING-HOUSE ON S. 23, T. 5, R. E., TIPPAH COUNTY. 20 FEET. INOHES CHARACTER OF STRATA. Yellowish-gray, calcareous clay, with veins of lime, and containing Exogyra costata. 20 2 12 "Bored Limestone," with Ammonites placenta, Cucullaea capax, C. Maconensis, Trigonia. 4 10 | Coarse glauconitic sand, with disintegrated shells. | 3 Black laminated clay, with veins of the above sand. 2 Soft ferruginous limestone, similar to that found E. of Ripley. 1 Here, as in Pontotoc and Chickasaw, gray calcareous clay takes the place of the black micaceous sand which usually overlies the limestone in Tippah (¶123) 134. While in Pontotoc county, as has been mentioned, the rocks of the Ripley Group reach the western border of the Rotten Limestone, the same is not the case in Tippah, except in the extreme S. E., on the Pontotoc line. Two fossili- ferous outcrops only are known to me, on the E. fork of Hatchie; and it is doubtful whether these do not assimilate more closely to the Rotten Limestone than to the Ripley Group. In N. Tippah, the calcareous strata occupy only a a narrow belt (3 to 4 miles), W. of the line between ranges 4 and 5, E., while on the W. fork, and main Hatchie below the junction, a black, fetid lignitic clay, interstratified with gray and greenish sand, forms the bluffs; and also the base of the hills, which are very high and thickly capped with Orange Sund, and largely timbered with pine, which is wanting on the territory of the calcareous strata.-Outcrops of this black clay, interstratified with sand, and greatly resembling, at times, the materials of the Eutaw Group, appear on the main Hatchie in S. 5, T. 2, R. 5 E., and in other localities lower down; on S 31, T. 2, R. 5 E., neir Walker's mill; on a branch of Hatchie on S. 16, T.,5, R. 5 E., and other points in this region, where it is very generally struck in wells. These prove, however, that its surface also has suffered great denudation before the deposition of the Orange Sand, for frequently, wells 70 to 80 feet deep do not reach the black clay, when on adjoining farms, at the same level, it is near the surface. Near a bridge on E. Hatchie, in N. E. 4, T. 3, R. 5 E., there is an outcrop exhibiting a black, very micaceous, sandy clay, non-effervescent, and with indis- 10 5 NO. 90 [1135, 136 GEOLOGICAL REPORT. tinct impressions of fossils. Nevertheless, Turritella Tippana was recognized, also a Nucula, Venericardia, Cytherea ? and Tellina ?-Near Kellum's mill, on E. Hatchie, on a creek, S. 25, T. 3, R. 5 E., there is a bluff in which about 20 feet of cretaceous strata are exposed, the upper portion being blue micaceous marl, containing the Owl Creek fossils, the lower more sandy and containing concretions rich in fossils of a character somewhat different; among them Baculites gigas, and a beautiful Pterocera with winged thorns of enormous length as compared with the lody of the shell. This lower stratum greatly resembles, n character, that found outcropping on Parmeechee (¶118). E. of this locality, in the Dry Creek region. near Jumpertown, shell marls are found in wells, whose palæontogical character I have not ascertained; they crop out on the summit of the ridges W. of Blackland (see T120) and resemble the Owl Creek marl, but are very poor in fossils. They appear to form the transition from the Ripley Group to the Rotten Limestone. The same is probably true of an outcrop on the head of Old Town Creek, at the E. foot of the Pontotoc Ridge, on S. 16, T. 8, R. 4 E. 135. The ridges S. of Wilhite's Creek, in Tippah, in the S. portion of T. 6, R. 4. E., known as "The Buncombes," may be considered as the N. end of the Pontotoc Ridge proper. The general geological character of this ridge has already been described; from the Tippah line to its termination N. E. of Houston, its hillsides and ravines exhibit numerous outcrops, both of “bored limestone" and of blue marl, generally interstratified with irregular limestone ledges, and containing the leading fossils of the Owl Creek marl, with many local variations and additions. While in some localities the uppermost limestone retains the great hardness of the Turritella limestone of Tippah (as on Labatubby, S. 36, T. 8 R. 2, where it appears in a solid ledge about 30 feet in thickness, and Mr. Daggett's, S. 32, T. 10, R. 36-both on the edge of the Flatwoods), at others it appears as a yellowish white, sandy, soft calcareous mass, which very frequently forms the bald prairie hilltops of the Ridge. Characteristic outcrops of this material may be seen at the mouth, and in numerous spots along the bluff of King's Creek, and of Okonaty hatchie; as also near Redland, overlying the bored limestone, into which it shows frequent transitions, by partial induration within its mass. 136. Where soft strata intervene between beds of rock comparatively solid, the soft stratum is sometimes washed away, so as to form caves, etc. Thus, on S. 25, T. 7, R. 2 E., a branch of King's Creek flows out of a cave between two beds of sandy limestone, and is spanned, 15 yards from the mouth of the cave, by a natural bridge 18 feet long, and about 5 above the level of the branch; it is 14 feet wide at one end, 5 at the other, and the ledge 2 to 2% feet thick. The cave at its mouth is about 9 feet wide by 6 high, but rapidly contracts, so as to become little more than a channel for the water; then again it expands into a long chamber of about the dimensions at the mouth, whose roof is covered with short stalactites. Subsequently it contracts again, forks, and cannot be followed up for more than about 120 yards, winding about, but generally in a S.S. W. direction. About 70 yards S. E. from the mouth of the cave, there are several • T137, 138] PONTOTOC RIDGE. 91 sink-holes, which lead down into the subterranean channel probably of the same stratum.* Similarly, on S. 36, T. 6, R. 4 E., near Parson Montgomery's place, there is a natural tunnel, about 25 yards long by 4 to 5 feet high and 3 to 7 yards wide; under a ridge. Several small caves and sink-holes exist in the neighborhood. Near the tunnel there is a fine outcrop of blue marl interstratified with indurate ledges; among the fossils found here is Trigonia thoracica; an Ostrea resembling O. falcata in shape, but 6 inches long; Ammonites placenta, and nuclei of a very large Cucullaea (C. Maconensis, CON ?). 137. Phenomena similar to these, and those already mentioned as occurring in Tippah county, on the territory of this formation, characterize, more or less, the whole of the Pontotoc Ridge, save where (as for instance, in a large portion of T. 9, R. 3 E., and also of T. 11, R. 4 E.) the Orange Sand overlies so thickly as to allow of traces only of the cretaceous formation being observed, in the deep hollows, and in springs with limy water at the foot of the ridges-there being also, freestone wells 40 to 50 feet deep. The bored limestone which crops out on the hillsides E. of Redland, in S. Pontotoc, and that seen E. of Houlka P. O., in N. Chickasaw (e. g. on SS. 4 and 35, T. 12, R. 3 E.) is undistinguishable in all respects from that of S. Tippah. The face of the country, timber, etc., is also strikingly similar, the chief differences being caused by the more frequent recurrence of bald hilltops, exhibiting the white calcareous sand mentioned above (¶135), and of ridges characterized by an excessively heavy soil bearing the Black Jack Oak, and popularly termed "beeswax hommocks." These hilltops are usually caused by the gray calcareous clay which, as has been stated, frequently overlies the limestone (as well as, of course, its representative, the whitish calcareous sand) in Pontotoc and Chickasaw; and on them we generally find strewn about, numerous dark colored, hard, smooth nuclei of shells of the Ripley group, together with white concretions of carbonate of lime. The position of the gray clay stratum (also found near Stubbs'; ¶133, No. 5 of Sec. 15) may be observed e. g. at an outcrop about a mile S. of the town of Pontotoc, on the Houston road, where a stratum of about 3 feet of this clay, teeming with black nuclei, overlies an outcrop of the "horsebone limestone" filled with Exogyra costata and Gryphaea mutabilis. The same material is seen on S. 34, T. 12, R. 3 E., Chickasaw county; it is here overlaid by a thin sheet of soft gray laminated limestone, and is poor in fossils. 138. Ammonites placenta, about a foot in diameter, together with a Cassidulus (?) is very common in some portions of the Ridge, where hard limestone crops out; as on the heads of Okonaty hatchie, and of King's Creek. On the S. bluff of the latter stratum, there are fine localities for fossils; as Herring, Esq., S. 17, T. 8. R. 2 E., and a few miles above, on S. 29, T. 7, R. 3 E. In both these localities, most of the fossils of the Owl Creek marl are found, imbedded in a loose, peroxidized glauconitic limestone; the claws of Callianassa, at the place of John *Close to this spot was the residence of the king of the Chickasaws, whence it is known as "The Kings Place.” 92 139 GEOLOGICAL REPORT. a Pectunculus, several Rostellariae, and numerous minute univalves being superadded-many in a very fine state of preservation. The bald hilltops of Chickasaw, as well as, for instance, an outcrop of gray sandy marl on Cherry Creek, near the P. O. of that name, furnish abundance of two small species of Hemiaster (about 3/4 of an inch in diameter), which I have not thus far observed in Tippah county, in whose marls and limestone Radiata are very rare. They occur, however, associated with Baculites Tippaensis, Crassatella Tippana, and other unquestionable Owl Ceek fossils. 139. FOSSILS OF THE RIPLEY GROUP. I give below a list of the fossils thus far collected by myself from the strata of the Ripley Group in Tippah, Pontotoc and Chickasaw, naming, generically, as far as the limited time at disposal allowed of their determination, those which could not be identified with species. heretofore described. (See T128; note.) I have to regret that at the time of preparing this list, in which I have been kindly aided by Prof. W. D. Moore, the latest pub:ication of Mr. Conrad on this subject (Jour. Acad. Nat. Sc. Phila., Vol. IV, n. s., pp. 275-291) had not come to my hands; for which reason, a part only of the new species there described by him (which have since been identified by Prof. Moore) will be found in this catalogue, although no doubt, several more of the undetermined species are described in the paper referred to. I shall, therefore, mention separately the species named by Mr. Conrad, found in Tippah county by Dr. Spillm.n, but not thus far identified with specimens in the collection of the Survey.- Species marked with an asterisk (*) have thus far been found only in the uppermost crystalline limestone. I subjoin also the interesting comparative list of the fossils of Tippah, New Jersey and Eufaula, Alabama, (prepared by Mr. Conrad, assisted by Mr. Wm. M. Gabb), given in the place above referred to; to which I would add that in 1856, I identified at least 2% of a collection, made by Tuomey, of fossils from the crystalline limestones and blue marls of Chunnenugga Ridge, Macon county, Alabama, with species previously found by myself on the territory of the Ripley Group in Mississippi. It thus appears that the beautiful and singular fauna represented by this group, is much more widely diffused than was at first sup- posed, and is well connected by transitions with other stages of the Cretaceous. The unusually large proportion of univalves as compared with bivalves, no less than many of the forms of both classes of Mollusca, are strongly suggestive of the approach of the Tertiary epoch, to whose strata as developed in Mississippi, those of the Ripley Group bear an extraordinary lithological resemblance. The very perfect state of preservation of the fossils, also, is somewhat startling at first sight, and instinctively recalls to mind the beds of the Tertiary. CEPHALOPODA. Ammonites placenta, MORT. Ammonites syrtalis, MORT. ? Scaphites Conradi, MORT. Scaphites Iris, CON T139] Turrilites spiniferu, Cox. Nautilus Dekayi. Baculites gigas, Con. Baculites Spillmani. Cox. Teredo sp. Teredina sp. Phol's, 2 sp. FOSSILS OF RIPLEY GROUP, Phila 'mmya unteradiata, CON. Philal mya sp., allied to Ph. M JNST. Pholadomya sp., allied to Ph. ana, D'ORB. Pholadomya Tippuna, Cox. Anatina? sp. Trigonia thoracica, Mori. Baculites Tippaensis, Cox. Baculites, 3 sp. undet. Nautilus circulus, Tuom. BIVALVES. Cibota lintea, CoN. Cucullaea vulgaris, MORT. Cucullaea ungula, MORT.? Cucullaea Tippana, CON. eleganta, Cucullaea capax, CON. Cucullaea Maconensis, CON. Marroti- Arca sp., allied to A. angusto, LAM. * Arca sp. Trigonia sp., allied to thoracica, ler. * Axinaea sp., 2 ins. long. Axinaea 2 sp. Nucula percrassa, Con. smal-Nucula peraequalis, CON. Nucula cuneifornis, Cox. *Trigonia sp., very large; Chunuenug-Pulvinites argentea, ON. Triyonia sp. ga Ridge. Legumen ellipticus, CoN. Legumen depressus, Con. Siliquaria biplicata, Cox. Periploma applicata, Cox. Gervillia ensiformis, CON. Dreissena Tippana, CON. Inoceramus argenteus, CoŃ. 98 Tellina, 2 sp. Inoceramus costellatus, CON. Inoceramus sp., allied to S. Goldfus- sianus. Inoceramus sp.-a very large hinge. Psammobia? nucleus, 6 in's. long by 4 Inoceramus sp. high. Papyridea bella, Cox. Meretrix Tippana, Cox. Dosinia densata, CON. Dosinia depressa, Cox. * Venericardia, 2 sp. *Cyprina ? sp. Isocardia sp., allied to I. cretacea. Venilla Conradi, MORT. Cardium Tippanum, Cox. Pecten striatopunctatus ROEM. ? Pecten simplicius, CON. Ctenoides acutilineata, CON. Placunanomia sp. Anomia sellaeformis, Cox. Ostrea peculiaris, CON. Ostrea confragosa, Con. Ostrea denticulifera, CON. Ostrea crenulata, TUOM. Ostrea n. sp., shape of O. falcata, 6 in's. long. Gryphaea mutabilis, MORT, Gryphaea convexa ? Sow. Gryphaea vomer. Exogyra costata. Cardium Spillmani, Cox. Cardium Eufaulense, CoN. Cardium Tippanum var ? Cardium sp., all. to C. Hillanum, Crassatella Ripleyana, CON. Crassatella pteropsis. Cox. UNIVALVES. *Dentalium sp. (smooth.) Solidulus linteus, CON. Dentalium sp., deeply 6 ribbed. Crassatella lintea, CON. Exogyra interrupta. *Natica alveata, CON. Natica rectilabrum. *Natica sp. Natica 2 sp. Nerita sp., May be N. densata Cox., but Purp- is smaller than the figure. lish dots on the surface perfectly preserved ! Bullopsis cretacea, Cox. Globiconcha sp. Turbincpis Hilgardi, Cox. Cytherina Tippana, CON. Conus (?) canalis, CON. (Conrad's fig- ure of this shell resembles very closely imperfect specimens of Athleta leioderma, CON.) Ancilla cretacensis, Con. 94 T139 GEOLOGICAL REPORT. Cerithium sp., allied to C. Dupinianum, Chemnitzia distans. D'ORB. Cerithium sp. Turbo? sp. Rapa supraplicata, CON. Turritella Tirpana CON.; numerous varieties. Turritella vertebroides, MORT. Turritella trilira, Con. Turritella oltilis, CON. Chemnitzia Melanopsis. Chemnitzia Spillmani. Ficus octoliratus, CON. Ficus novemĺiratus, CON. Turris Ripleyana, CON. Fusus Tppanus, Con. Fusus lellaliratus, Con. *Fusus sp. Fusus sp. Turritella sp., with two acute revolving Strepsidura Ripleyana, cos.ae. CON. Pynfusus subdensatus, CoN. Turritello sp., allied to T Bauga, D'ORB.; Pyrula, 6 sp. shell of the "Turritella Limestone" Tudicla perlata, CoN. (T131, ff.) Turritella sp, very small, smooth. Volutilithes Eufuvlensis, CON. ? *Voluta. Athleta leioderma, CON. Rostellaria sp., allied to R. Reussit, GLIN. *Rostellaria allied to R. velata, CoN., about half as large. Rostellaria sp. Athleta?-A beautiful fusiform shell, Strombus densatus, CON. 4½ in's. long, with numerous acute Aporrhais decemlirata, Con. revolving costae. Also found on Pterocera sp., with long winged thorns Chunnenugga Ridge, by Tuomey. (¶134). Drillia novemcostata, CON. Harpago Tippanus, Con. Pugnellus densatus, CON. Trichotropis concellaria, CoN. Purpuroidea Ripleyana, Cox. Chemnitzia interrupta, CON. Chemnitzia interrupta var. ? Chemnitzia laqueata, CON. RADIATA. Hemiaster, 2 sp. *Cassidulus (non DESOR) subquadratus, *Cassidulus? (Echinanthus ?) sp. [Con. ANNELIDE. *Cassidulus CON. (non DESOR), shape of Foujasia apicalis. 1 Serpula 2 sp. CORALS. * Ceriopora sp. Numerous undetermined nuclei of univalves and bivalves. Tippah Fossils described by Conrad, but not identified in the Survey collection : Actaeon modicellus. Natica crenata. Anchura abrupta. Thylacus cretaceus. Turbonilla corona, Plicatula tetrica. Mysia parilis. Dosinia obliqzata. Sanguinolaria cretacea. Morea cancellaria. Pholadomya post-sulcata. Pholadomya papyria. Pholadomya occidentalis MORT. Pecten argillensis. Pecten Mississippiensis. 139, 140] FOSSILS OF RIPLEY GROUP. Species common to the Upper and Lower Cretaceous. (CONRAD & GABB, Jour. Acad. Nat. Sc. Phila. Vol. IV n s., p. 275). Pholadomya occidentalis, MORT., Dosinia excavata (Cytherea), IB., Fragilia elegantula (Cardium), Roem., F protext, Con. Carlium Spillmani, CoN., Trigonia thoracica, Mort, Pycnolonta vesicularis (Gryphaea), LAM., Gervillia ensiformis, CoN., • Exogyra cost itu, SAY, Pinna bicarinata, MATH., P. laqueata, Con., Tippah, << New Jersey. Texas. 66 แ 66 Eufaula, (C Axinxen (Pectunculus) australis, MORT., Meretrix Tippna, Cox, Ctenoides pelagica (Lima), MORT., Crassitella vadosa, MORT., C. lintea, CoN., Barbatia uniopsis, Con., Pecten Burlingtonensis? GABB, Anomia argentaria, MORT., Turritella vertebroides, Mort., Ficus octoliratus, CON., Turbinopsis Hilgardi, CoN., Nautilus Dekayi, MORT., Baculites carinatus, MORT., B. Spillmani, Con., Solenoceros annulifer, (4 Eufaula, CC (6 C SC "L " "L (t แ (C | Hamites annulifer, MORT., Vermetus (Hamulus) onyx, MORT., แ แ i 66 LL 5 USEFUL MATERIALS OF THE CRETACEOUS FORMATION. 95 140. These consist essentially of Marls or mineral fertilizers, Limestones, and Building Stones. It is probable also that among the materials embraced in the two former classes, some will be found to possess hydraulic properties. MARLS. No material deserving the name of marl, occurs within the Eutaw Group. Tomb gbee Sand.-The micaceous sands of this group in some localities are sufficiently calcareous to render its u-e as a fertilizer profitable, especially as lime is generally very deficient in the soils which it underlies. In Tishomingo county, the materials occurring at Boyer's mill (T111) and on lower Big Brown's Creek generally, deserve attention and trial; none of them will, however, bear much transportation, nor should they be applied to soils already very sandy. The greenish calcareous sand of Dr. Tindall's bluff, near Aberdeen (113), has been used with advantage by that gentleman. Similar deposits occur in many localities along the Tombigbee at and below Aberdeen; at Barton (T107); and at Plymouth Bluff (114). 96 [T141 GEOLOGICAL REPORT. Of these materials, the only specimen I have as yet analyzed, was taken from the bluff at Waverley, Lowndes county, just under Col. Young's warehouse.—A greenish gray, micaceous, soft, sandy mass, with few fossils, forming steep bluffs. SAND FROM WAVERLEY BLUFF. Micaceous Sand.. Potash... Soda... * Lime.. Magnesia.. Peroxide of Iron, and Alumina. Phosphoric Acid.. Sulphuric Acid. Carbonic Acid.. Water. 88.702 .0.204 0.190 . 1.351 .0.723 ..5.598 .0.328 .0.013 ...0.472 .2.308 99.884 The small amount of nutritive ingredients contained in this mass, would not pay for the cost of hauling out, on the large scale, unless it were very conveniently at hand, and the sand were needed as a mechanical manure. The amount of phosphoric acid shown by this analysis is nevertheless as large as is usually found in the marls of Mississippi. The sand of the Columbus bluff is poorer, probably, than that of Waverley; but in many points (e. g at Plymouth Bluff) the materials are sufficiently rich in lime to deserve the earnest attention of agriculturists. The region has not as yet been examined specially enough in this point of view. 141. Mails of the Rotten Limestone Group.-I regret having been unable, as yet, to bestow more special attention on the white and gray clay marls of Tishomingo and adjoining portions of Pontotoc and Itawamba. Those of Breuton's contract (T118), Parmeechce (118), Tishomingo and Yoonaby Creeks, and others of N. E. Pontotoc, appear to assimilate more nearly in their character to the Houston marl than to the Rotten Limestone proper. An analysis of the latter will be given below; that of the marl dug from cisterns at Houston, Chickasaw county-a bluish gray mass, quite hard when dry, but somewhat plastic when wet-gave the following result: { 142, 143] MARLS OF THE ROTTEN LIMESTONE. HOUSTON MARL. Insoluble Matter (micaceous clay). Potash. Soda.. Lime Magnesia... Brown Oxide of Manganese. Peroxide of Iron.. Alumina Iron Pyrites... Carbonic Acid. • Organic Matter and Water. • .35.750 0.681 0.197 ..20.558 1.366 0.305 4.190 9.475 .* 1.743 16.760 8.774 99.799 97 The iron pyrites contained in this marl (which is otherwise ad- mirably adapted to light soils), renders necessary some caution in its application. It should be allowed to lie exposed to the atmos- phere as long as possible (several months at least), in order to effect the decomposition of the minute crystals of pyrites, which results in the formation of gypsum-enhancing the value of the material as a fertilizer, in several respects.-Outcrops of the Houston marl (which extends eastward to Kilgore's Ridge, and probably south- ward to the Tibby) are scarce, but it is generally not far under- ground in the district of its occurrence, as is known in each neigh- borhood where wells have been dug.--A determination in the yel- lowish-white, micaceous clay marl from Breuton's contract (ncar Chawalla) on the M. & C. R. R., of the Carbonic Acid, considered as belonging to carbonate of lime, yielded a result corresponding to 21.0 per cent. of the latter substance, or to 11.8 per ct. of pure lime. 142. As for the Rotten Limestone-itself, strictly speaking, a marl, in most cases-it is unnecessary to mention its outcrops, since no one who has his eyes open can fail to find them where they exist. It is to be considered chiefly as a calcareous, stimulant manure; yet, as the analysis shows, it carries with it some nutritive ingredi- ents, which account for its favorable effects even on the whitish, highly calcareous bald prairie soil. In regard to the many import- ant uses which this calcareous material may subserve, the reader is referred to what is said under the head of Lime and Marls, in the General Part of the Agricultural Report. 143. Marls of the Ripley Group. Their distinguishing feature is the visible grains of greensand, or glauconite, which they con- tain, and to which they owe a higher percentage of potash, and (with silica), in a more available condition, than seems to be the case with the clay marls of the Rotten Limestone. This, and the carbonate of lime contained in them, constitutes their chief value; and since the former can be judged of by the eye, and the latter by the strength of its effervescence ("boiling") with strong vinegar, R-7 $8 [144 GEOLOGICAL REPORT. or muriatic acid ("spirits of salt"), it is not difficult for the planter to obtain an approximate idea of the value as fertilizers, of most of these marls; especially as, in the majority of cases, the greater or less abundance of shells is itself somewhat indicative of the amount of lime in the mass. When fresh and moist, its tint is usu ally bluish-gray, with white specks (being fragments of shells) and glistening scales of mica ("isinglass"); and when cut, if the mass contains any notable amount of greensand, dark green, or almost black streaks will be visible on the surface, which may be traced back to rounded grains, from the size of a grain of rifle-powder to that of a gumbo seed, with a smooth surface, and generally of a flattened shape. Sometimes, however, the grains are so small as to be perceived only by the aid of a magnifier, or by the general tint of the mass. In searching for these marls in the region of occurrence indi- cated on the map (by the bright green ti.it). it should be recollected that, as has been stated, they generally undrelie the limestone; and that if they have been struck in wells on the ridges, they are likely to be found at the same level, at no great depth, on the hill- sides. 144. The marl at Wilhite's (T131) showed the following compo- Bition : WILHITE'S MARL. Insoluble Sand and Clay. Potash... Soda... Lime Magnesia.. Brown Oxide of Manganese.. Peroxide of Iron.... Alumina... Phosphoric Acid. Carbonic Acid, Water and Loss. " .73.410 · 0.702 (detn. lost) • 6.315 Q 0.886 0.050 • • 7.055 5.888 0.046 • 5.640 100.000 This marl, while containing a large amount of potash, contains at the same time so much inert matter, that it will not bear trans- portation to any great distance, inasmuch as a "dressing" will require a quantity greater in proportion as the active ingredients are less. No overdressing with a marl like this will be likely to happen. This is the only marl of this character which I have thus far analyzed, but judging from appearance, it represents very nearly the marls of the following localities: in Tippah, Kindrick's mill (1131, Sec. 12), Ruckersville; Braddock's (131); Owl Creek (132); lowest stratum at Tippah Creek bluff, at Ripley (T132, Sec. 13); Edick's place, S. of Ripley; blue marls on Ripley and Molino road; at Col. Berry's (133), and at Lewis L. Nabors', T145] + RIPLEY MARL. 99 S. 22, T. 4, R. 5 E. Some of the marls mentioned are prob- ably more cal areous than the one analyzed, as appears to be more generally the case in Pontotoc county; as for instance, at Parson Montgomery's (T13); at Mr Wages', on one of the heads of Okonatyhatchie, S. 18. T. 7, R. 4 E; at the old mill on Cherry Creek, near the post-office of that name; on the hill S. of the crossing of Brown's Creek, on the Ellistown and Pontotoc road, and on the E. slope of the ridge on the same road, in T. 8, R. 4 E., (e. g. on S. 2); on the branches near the mill on S. 36, T. 9, R. 4 E, E. of Pontotoc, and probably on many of the heads of the Chiwapa, S. of Pontotoc; at the Baptist church on S. 28, T. 14. R. 3 E, Chickasaw county; etc. While the specimens from these localities appear to contain about the same amount of green- sand as the marl from Wilhite's, their stronger effervescence with acids and greater coherence shows them to be richer in lime. Yet as a general thing, these blue marls are not so limy that an over- dressing of any moderately clayey soil need be feared with any quantity less than 4-to 600 bushels per acre. 115. In Tippah county, at Ripley, and W. of the same, there occurs another kind of marl, generally richer in greensand grains than that just described, and containing few shells not disintegra- ted. The stratum is seen in the outcrops of Kindrick's mill (T131, Sec. 12, stratum No. 2), and on Tippah Creek at Ripley (T132, Sec. 13, stratum No. 3); it is also found in wells at the latter place, and is well developed in the outcrops just W. of town, and particularly at Mr. Wernor's place, S. 22, T. 4, R. 3 E., where it is very remarkable for the large amount of greensand it contains. An analysis of rather a poor specimen of this marl, from Mr. O. Davis' well, at Ripley, gave the following result : MARL FROM 0. DAVIS' WELL, RIPLEY. Insoluble Matter (chiefly coarse Sand). Potash.. Sola Lime... Magnesia. Brown Oxide oi Manganese. Peroxide of Iron.... Alumina... Phosphoric Acid..... Carbonic Acid, Water and Loss... • • .62.441 0.730 0.272 7.952 1.560 0.160 11.849 5.865 0.266 9.905 100.000 On an average, this kind of marl is undoubtedly superior to Wilhite's, containing as it does, more potash, lime and phosphoric acid. It has already been used with fine effect in the neighborhood of Ripley.--A material very similar to this, is found at the church near Stubbs' (T133, Sec. 15, stratum No. 3), but its quantity is Dor M 100 [T146, 147, 1471. GEOLOGICAL REPORT. insufficient for practical purposes. Otherwise, I have not found it at any great distance from Ripley, except to the westward. * 146. The white or gray calcareous sand mentioned (T135), may in many cases serve as a marl, when it is not too sandy-it would generally, no doubt, improve greatly the "beeswax hommocks." That found at Tocshish church, and near Redland (T135), is scarcely more sandy than the limestone it overlies. But its character in this respect is so variable, that each one must be left to judge for himself in his particular locality. The gray calcareous clay which frequently overlies the limestone and calcareous sand in Pontotoc and Chickasaw, (¶137), I have not yet examined as to its fertilizing qualities; but judging from the rich growth of timber where it mingles with the sandy ridge soils, it possesses other useful ingredients besides the lime, to render it a serviceable manure. Outcrops of this material are mentioned in the passage just quoted. 147. LIMESTONE.--None is found within the territory either of the Eutaw, or of the Tombigbee Sand Group. The most calca- reous rocks of the latter only deserve the name of calcareous sandstones. Rotten Limestone Group.-In numerous localities, the rock of this group is well suited to the manufacture of lime of good quality, and is so used quite extensively in the prairie region. Notwith- standing its uniformity of aspect, however, there is considerable variation in this rock as regards its suitability for lime-burning. These variations often occur without any striking indication of a change by the stratification, color, or otherwise; and a few direc- tions concerning the selection of this rock for lime-burning, will not, therefore, come amiss. The hardest varieties in one and the same bed are usually the purest (unless they be sandy), and should be selected in preference to the soft. Those which are chalky, and exhibit the least gloss on cut sur- faces are preferable to those showing a smooth shining cut. The Another good distinctive mark is the degree of plasticity which the rock attains when crushed and kneaded up with water. less it works like clay, and the more like prepared chalk; and the less, in moistening, the clay odor is perceived, the purer is the rock-also, the more vividly it effervesces ("boils") with (one and the same) strong vinegar, muriatic, or sulphuric acid. 1471 The difficulty in the manufacture of lime from the Rotten Limestone, is not so much caused by the amount of foreign (usually clayey) matter it contains, as by the extremely fine state of division in which the carbonate of lime and clay are mixed together, which renders the rock liable to overburning, unless great care is had in the management of the fire. Experience must determine in each locality the proper amount of burning to be given; it ought to be less in all cases than would be employed in burning pure, hard limestone, and the heat ought to be equalized as much as possible. It is not easy to regulate these circumstances in an ordinary kiln, in which the whole process is interrupted in Maou T148, 149] CRETACEOUS LIMESTONE. 101 order to draw the burnt lime. The kilns used ought to be of the "perpetual” kind, where the process is carried on without interruption and, once properly adjusted, goes on evenly, turning out a product always of the same quality. Such, moreover, consume much less fuel than the common ones—an item of importance in the prairies. There can be no doubt that if the kilns were im- proved, lime of good quality could be made in numerous localities where it is now deemed impracticable, after a trial with the ordinary kiln. In burning lime for agricultural purposes, especially, any other than a perpetual kiln ren- ders the article too expensive. + 148. The material of the Rotten Limestone Group in Tisho- mingo county, is generally too impure for lime-burning; the purest rock found occurs, probably, on the heads of Twenty Mile Creek, W. and S. of Blackland, and on lower Tishomingo Creek, near the Ripley and Carrollville road. The materials found further N. are generally too clayey for quicklime, but some of them will, no doubt, answer for hydraulic cement. Lime has, it is true, been made in several localities on the cretaceous territory in Tisho- mingo county, but it was from the shells of oysters, (Exogyra cos- tata, Gryphaea convexa and mutabilis), which yield a very strong lime. The supply of these, however, is too small to be of more than very local importance. I am not aware that any rock sufficiently pure for lime-burning, exists in Itawamba county-none, at least, E. of Old Town Creek. W. of the same, on the prairies and "Chickasaw Old Fields" of Pontotoc, the rock is very similar to that of Monroe. 149. Good lime is made at Camargo, where a ledge of hard rock yields white lime for plastering, while the underlying softer strata furnish common mortar. At Okalona, also, lime is made an analysis of the rock, taken from a cistern here, gave the follow- ing result: OKALONA ROTTEN LIMESTONE. Insoluble Matter. Potash • Soda. Lime. Magnesia... Peroxide of Iron. Alumina Carbonic Acid. Water. 10.903 0.248 0.320 45.791 0 877 1.421 1.957 35.725 2.840 100.082 One cwt. of this rock will therefore yield about 61 lbs. of burnt lime, containing about 15 lbs. of impurities which, while causing it to slake with less energy, must impart to it some hydraulic prop- erties. It would seem advisable, therefore, not to slake and mix into mortar very large quantities of this lime, at any one time, and to use it, when made, as rapidly as possible. In this manner the hydraulic properties, which would 102 [T150, 151, 152 GEOLOGICAL REPORT. impair the quality of the mortar if prepared in large quantities beforehand, may on the contrary be turned to advantage. 150. Ripley Group.-In numerous localities, the limestones over- lying the blue marls of this group, are well suited to lime-burning. Here, however, the hardness of the rock is not always a safe criterion as to its purity, since that is not unfrequently owing rather to the presence of a large amount of sand firmly cemented by lime, than to the solidity of the calcarcous mass itself. While in the Rotten Limestone, as we have seen, the impurities of the rock are in an impalpable condition, finely diffused throughout the mass, the impurities of the rocks of the Ripley Group are generally present in shape of visible and tangible sand-grains, and can therefore be detected and judged of with less difficulty. There is, also, less danger of overburning, than in the case of the Rotten Limestone; and its relative purity may be ascertained conveniently by dissolving a fragment of the rock in vinegar or muriatic acid, which will leave the sand behind. It has been found that in the neighborhood of Ripley the seft varieties of the limestone yield a better lime, than the hard "Turritella Limestone" (owing probably, to the large amount of sand which the latter contains, and which contributes largely to its hardness); notwithstanding that its color is purer than that of the soft rock. 151. In general, the purer varieties of this rock may be looked for chiefly along the western edge of the territory of the Ripley Group, where it verlies the Owl Creek marl. The ledges inter- stratified with the marl, are rarely sufficiently pure to be suitable for quicklime, although in many cases they would yield a product well adapted for agricultural purposes. These marlstones are much richer in the nutritive ingredients of plants, than any of the rocks of the Rotten Limestone Group, and burning renders these ingre dients more soluble, and highly effectual. For this reason, the product of burning these impure marlstones, is generally preferable even to the purest lime, for use in agriculture. It is generally not difficult to distinguish the varieties to be preferred in this point of view they either possess a general greenish tint, or else rounded grains of a dark green color (greensand proper, or glauconite) may be seen dotting the freshly broken surfaces. A large--perhaps the greater portion of the "bored" or "horsebone limestone" belongs to this class, although not unfrequently, ledges of sufficient purity for quicklime occur in the same. 152. The limestone occurring near Jonesboro', on S. 11, T. 2, R. 4 E.. (T13) contains many greensand grains, but will doubtless answer for quicklime. That at Kindrick's mill (131) is best suited, probably, for agricultural purposes. At both the localities mentioned, however, the quantity is small. The rock may proba- bly be found outcropping in numerous ravines descending to Muddy Creek; as near to the W. line of the formation in Tippah generally. 153] LIMESTONE OF RIPLEY GROUP. 103 The outcrops E. of Ripley furnish, probably, the best material for quicklime in that neighborhood; that which contains numerous st ms of corals seems to be best. Most of the bored limestone occurring there is rich in greensand. On the road from Ripley to New Albany, the coralline limestone crops out in numerous localities; the same is the case on the Ripley and Molino road, and also no doubt, in the country intervening between the two roads. The locality near Stubbs' (133) will no doubt furnish good material both for quicklime and for agricultural purposes. In the "Buncombes", limestone frequently crops out on the hillsides; that at Parson Montgomery's (T136, is known to make good lime, and so probably will that at the King's Place (T1.6). On S. 29, T. 7, R. 4 E., on the Tardyville and Ellistown road, good limestone appears on the surface; as it does in many localities in the hills S. of King's Creek. The bluff on Labatubby, S. 36, T. 8, R. 2 E., affords a fine chance for an establishment on a large scale, so far as the quality and quantity is concerned, and the same may be said with reference to the outcrops on the edge of the Flatwoods at Mr. Stephen Daggett's, on SS. 3 and 30, TT. 9 and 10, R. 3 E. 153. An analysis of an average specimen of Daggett's limestone, such as is used by him in burning lime for sale, gave the following result: DAGGETT'S LIMESTONE. Insoluble Matter (chiefly sand) Potash.. Soda.... Lime.. Magnesia... Brown Oxide of Manganese. Peroxide of Iron, and Alumina. Sulphuric Acid. • Carbonic Acid.... Water. .8.374 ..0.359 ..0 089 48.815 .0.751 0.173 2.412 0077 ..38.485 .0 832 100.367 One cwt. of this rock will yield somewhat over 60 lbs. of burnt lime containing about 11 lbs. of impurities; which, however, for want of intermixture with the lime, do not impart hydraulic properties to the latter, since it slakes with energy. This lime answers every architectural purpose except whitewashing. It is due, no doubt, to the large amount of potash which the lime made from this limestone contains, that effects unusually favorable were observed to follow its application to soils, in the neighborhood of Pontotoc. Yet this rock contains but few visible grains of green- sand.In this respect, it is greatly surpassed by the rock of an outerop i mile S. of Pontotoc. on the Houston road, which never- theless, by carefal burning, could also be made to serve for quick- lime. The "horsebone limestone" near Redland, and southward to the end of the formation, is generally of a similar character. 104 LT154, 155 GEOLOGICAL REPORT. 154. BUILDING STONES.-The Eutaw Group furnishes none; all the rocks found on its territory belong to the Orange Sand Group, which see (157). Very nearly the same holds true of the Tombigbee Sand Group; the soft micaceous sandstones occasionally found are of little value and easily destroyed by frost. The Rotten Limestone is generally too soft to resist the action of the atmosphere; in sheltered situations, it sometimes stands well, and is easily cut into shape. At Palo Alto, and at other localities, fireplaces, and the sheltered portions of chimneys, have been built of it. It will not resist many alternations of wet and dry above ground, without scaling off; although different localities differ greatly in this respect. The limestones of the Ripley Group, where they are solid and uniform in their mass, resist the action of the atmosphere remarka- bly well, and are suited to every common purpose in building. There are few localities, however, in which large solid blocks can be obtained; the best I know of occur on the Labatubby, and at Daggett's (see above, under Limestone). Usually the solid ledges are thin (seldom exceeding 15 inches, and frequently broken up into blocks which require only the peck and crow-bar to quarry them. Little reliance is to be placed in the continuity of a stratum with the same character of inaterial; a solid ledge on one ridge may be a bed of loose calcareous sand on the next.-For localities where rock is found, sce under the head of Limestone. 155. WATERS OF THE CRETACEOUS FORMATION.--Specialities concerning the depths and character of wells in the various districts of the cretaceous territory, will be found under the head of "The Northeastern Prairie Region," in the agricultural portion of the present Report. A few general remarks, however, must find their place here. Water-bearing strata are abundant in both the Eutaw and the Tombigbee Sand Group, but especially in the tormer, which fur- nishes the source of by far the greater number of artesian wells in the State, in Lowndes and Monroe counties. It is between the solid, blue and reddish clays of this group, in the intervening gray sands, that the head of water which enables the latter to run out at the mouth of the bores, is collected. While, however, there is considerable consistency in the depths of the wells, in the direction of the dip, there is much less regularity observed in the direction of the strike; the strata evidently running out sometimes on the large scale, as they commonly do on the small. Almost all the waters of artesian and bored wells are more or less limy, and few if any are free from iron in some form; sulphuretted hydrogen, too, is usually present. The springs flowing from the strata of the Eutaw Group in Tishomingo and Itawamba, are all more or less chalybeate and usually magnesian, but contain mostly chlorides and carbonates, and very little lime; and the same is the case with those bored, and especially artesian wells, which touch little or OF · 156, 157, 158] BORED AND ARTESIAN WELLS. 105 none of the calcareous Tombigbee Sand or Rotten Limestone. It is likely, therefore, that in most cases, the lime is imparted to these waters by standing in, or passing through, the calcareous strata which overlie the water-bearing formation. 156. In the bored wells in which the water is stationary, the iron is usually contained as proto-carbonate, which is soon precep- itated by the air, forming a dark brown scum or sediment on the bucket. In some of the artesian wells, however (as in the case of Gen. R. Davis', at Aberdeen), there is proto-sulphate of iron, pro- ducing a yellowish brown sediment of basic persulphate. Perhaps the iron is in most cases contained originally as proto-sulphate, derived from the "sulphur balls" occurring in the dark-colored clays, and is thereafter transformed into carbonate, and partially precipitated, by the contact with the carbonate of lime. Some waters derived from the Eutaw Group contain a large amount of silica; as for instance, that of Dr. Rabb's well at Columbus, which incrusts tumblers immersed in it with a firmly adhering, brown film. When the surface thus coated is heated with hydrochloric acid, the iron is removed and a whitish film remains, which is soluble in potash and insoluble in salt of phosphorus. The elevated portion of the strata which furnish the water of the Columbus and Aberdeen wells, is doubtless to be sought in the high ridges bordering on the Buttahatchie and Looxapalila; although these show on their surface, and sometimes at great depths, nothing more than Orange Sand strata. Few wells are sunk in the Tombigbee Sands alone; they have very limy water. 157. On the territory of the Rotten Limestone, little water is to be found, unless in surface tanks, or by passing through the whole stratum, into the Tombigbee Sand, or Eutaw Group. Locally, however, small water-bearing strata have occasionally been struck within the Rotten Limestone. Thus at Okalona, at 75 feet, water excessively limy and with little rise, and insufficient in quantity, was obtained. At Houston and Sparta the same thing happens (T122), the water at the latter place being in some cases a perfect ley of gypsum and Epsom salt. For a supply of water in the prairie region, therefore, the alternative generally lies between deep bored wells and cisterns; unless indeed, as on Kilgore's Ridge, there should be a mass of Orange Sand of sufficient thickness, overlying the rock. 158. On the territory of the Ripley Group, there is little diffi- culty about water. In the first place, springs are abundant. Orange Sand very commonly forms the higher portions of the ridges, while the cretaceous marls underlic as an impervious statum; finally, good water (though somewhat limy) may frequently be struck in the strata of the Ripley Group themselves. Such is the case in Tippah, where the calcareous s: rata of the Ripley Group are passed through at 40 to 70 feet, into water-bearing sand. So also, the 106 [T158 GEOLOGICAL REPORT. sandy strata intervening between the ledges of limestone, in Pon- totoc and Chickasaw, are frequently water-bearing, so that in the meridian of the town of Pontotoc, water is generally obtained between ledges of limestone at depths between 70 and 130 feet; the water rising 20 to 40 feet from the bottom of the well. The water of these wells, also. is frequently sulphureous and chalybeate, and springs of the same character are abundant in numerous local- ities on the territory of the Ripley Group. THE TERTIARY FORMATIONS. 159. By far the greater portion of the State of Mississippi is occupied by deposits of the tertiary age, if we leave out of con- sideration the strata of the Orange Sand, which undeniably forms the greater portion of the actual surface. The position of the Tertiary strata appears to be more or less in conformity with that of the cretaceous beds. It certainly is so in the southern portion of the State, where their dip is distinctly southward. Whether or not the same is true in reference to the strata occupying the northern portion of the State, I have thus far been unable to determine, in consequence both of the rare accessi- bility of the strata, and of their character. If, however, any westerly dip exists in the tertiary strata of N. Mississippi (as is the case in the cretaceous strata) it is certainly much less than that of the latter. The tertiary of Mississippi exhibits, essentially, three different facies, viz: That of lignitiferous clavs and sands, varying in color from black to brown, blue, green, yellow, gray and almost white, with remains of vegetables; that of siliceous sandstones and claystones with marine fossils; and that of limestones and calcareous marls, with marine fossils. 160. The several marine stages are in most cases separated by intervening strata of dark colored, often lignitic clays, as above mentioned; moreover, both the base and the top of the older tertiary are formed by strata of this character, of considerable thickness. Small estuary deposits of mariu fossils are occasionally found in the Lignitic strata; and vice versa, small masses of lignitic deposits sometimes occur in the calcareous tertiary. as they do in the upper cretaceous formation. Chemically, the Lignitio strata are characterized (with very rare exceptions) by the absence of the carbonate of lime, and the presence, per contra, of sulphate of lime or gypsum in its various forms, usually accompanied by sulphate of magnesia or Epsom salt, and com non salt; while these ingredients are almost entirely absent from the marine Tertiary.* 161. The following general section of the Tertiary of Mississippi will serve to show its prominent traits, as far as ascertained up to the present time. The approximate thickness given may be taken as minima, which are often greatly exceeded. *I shall not include, for the present, in the general remarks on the tertiary of Mississippi, the imperfectly known strata of the Sea-Coast, which may be Pliocene or Post-pliocene, and will be treated of at the conclusion of the description of the more ancient Tertiary. 108 [T161 GEOLOGICAL REPORT. GENERAL SECTION OF THE TERTIARY STRATA OF MISSISSIPPI. FEET 150 NAME, CHARACTER AND FOSSILS. GRAND GULF STAGE, OR SOUTHERN LIGNITIC.-White or gray sandstones, usually soft; black, blue, green and gray clays and sands, with small Lignite beds, tree palms, exogenous trees, Arundinaceae. VICKSBURG STAGE.-1. Crystalline limestones and blue marls, with Ostrea Vicksburgensis, O. gigantea, Cardium diversum, Arca 80 | Mississippiensis, Navicula Miss., N. lima, Crassatella Miss., Den- talium Miss., Panopaea oblongata, Fulgoraria Miss., Cypraea lintea, Madrepora Miss., Pecten Poulsoni, ORBITOIDES MANTELLI. 2. Ferruginous rock of Red Bluff, with Plagiostoma dumosum?, Fulgoraria Miss., Mitra Miss., Busycon spiniger, Conus sauridens, Rostellaria velata, Cassidaria lintea, Madrepora (all. to M. Miss.), 12 Dentalium thalloides, Trochita trochiformis, Natica Vicksb., Flabel- lum Wailesii, Osteodes n. sp., Venericardia planicosta, V. rotunda, Cypricardia sp., and many peculiar species. 20 LIGNITIC CLAY AND LIGNITE, at Vicksburg, and N. of Brandon. 80 JACKSON STAGE.-White (often indurate) and blue marls, with Venericardia planicosta, Rostellaria velata, Cardium Nicolleti, Cor- bula bicarinata, Leda multilineata, Cypraea fenestralis, Conus tor- t'lis, Gastridium vetustum, Mitra Millingtoni, M. dumosa, Voluta dumosa, Morio Petersoni, Umbrella planulata, Osteodes irroratus, Flalellum Wailesii, Trochita alta, ZEUGLODON MACROSPONDYLUS. | LIGNITIC CLAY AND LIGNITE, at Jackson, Garlandsville, Coonupy Cr. CLAIBORNE STAGE.-A. Calcareous.-White (sometimes indurate) and blue marls, with Ostrea sellaeformis, O. divaricata, O. panda, Venericardia planicosta, V. rotunda, Rostellaria velata, Monoceros pyruloides, M. fusiformis, Orbis rotella, Natica gibbosa, Anolax gigantea, Oliva Alabamensis, Marginella larvata. b. LIGNITIC CLAYS AND SANDS of N. Clarke county? B. Siliceous Claiborne.-S. Neshoba, N. Newton, S. Lauderdale, N. Clarke; sandstones and claystones with Venericardia planicosta, V. rotunda, Monoceros, Pyrula, Voluta petrosa, Corbula gibbosa. LIGNITIC OF N. LAUDERDALE !, Neshoba. Dark brown and yel- 425 low clays and sands with Lignite-sometimes obscure casts of shells. ? LIGNITIC OF N. MISSISSIPPI : a. Gray clays and sands of Tippah, sometimes transformed into red shale, with Quercus n. sp., Carya n. sp., Populus rhomboidea, Populus n. sp., Morus?, Ficus lanceolata, HEER?, Laurus n. sp., Persea n. sp., Cornus sericea?, Olea Americana!, Rhamnus n. sp., Terminalia 2 n. sp., Magnolia rotundifolia Lesqx.!, M. acuminata MICHX.!, Dryandroides?, Rhus. b. Gray clays of Lafayette and Calhoun, with Sabal, Cinnamo- mum, Quercus, Ficus?, Smilax ? c. Gray clays and sands of Winston, with Cycas, Smilax? d. Small estuarian deposits of sandstone with marine shells. Tippah: Venericardia planicosta, Cardium Nicolleti, Trochus, Ostrea. Shongalo Ostrea divaricata, Solarium, Voluta petrosa, Veneri- cardia rotunda, Turritella vetusta, LEA?, Cardium Nicolleti, Nautilus zigzag. NO 10 9 CO 8 | 7 1 6 5 4 3 คว 2 I 162, 163] AGE OF NORTHERN LIGNITIC. 109 162. The only doubt as to the stratigraphical position of the members of this series, exits with reference to the strata designated as the Lignitic of North Mississippi. The conformation of the surface, the scarcity of fossil remains, and the variability of the strata, both as to thickness and lithological character, render a direct determination of the stratigraphical relations between this group and the calcareous tertiary, extremely difficult. While there can be no doubt whatsoever, as to the position of stratum No. 1, the equivalence of No. 1* to the same still remains to be proven by a comparison of the respective floras, for which, thus far, the materials are incomplete. For the determinations of genera and species of plants given in the table, I am indebted to the kindness of Leo Lesquereux, Esq., of Columbus, Ohio. Thus far, however, only the fossils of locality a (Red Shale) have been specially studied by him, and it remains doubtful how far the floras of the respective districts may be related. Although not susceptible, at present, of strict, direct stratigraphical proof, the probable equivalence of the lignitic beds underlying the siliceous strata of the Claiborne age, in Lauderdale, and of those overlying the Upper Cretaceous in N. Mississippi certainly impresses itself strongly upon the mind of the observer in the field. An uninterrupted belt of lignitic strata, often outcropping, and always reached in wells, extends along the W. border of the cretaceous territory [where it gives rise to the Flatwoods (T164),] from the Tennessee line to the northern border of the marine tertiary. The strata show no observable dip in this direction, until we reach the region last mentioned, where they disappear under the marine siliceous claystones and sandstones on the E. half of the territory, and under the calcareous marls on the W. On the whole of this line, there is no more change of lithological character, than may be observed in almost any single locality; even to the minute particulars, the same phenomena which we saw in Tippah, Marshall, Pontotoc, Lafayette and Calhoun, may be observed in Choctaw, Winston, Kemper and Lauderdale. 163. Several of the plants from the red shale (locality a) determined by Mr. Lesquereux, are considered peculiar to the Miocene of Europe; the rest appear to be analogous at least, and would therefore place the strata containing them above the marine tertiary of the State-assumed to be of eocene age, and cer- tainly not referrible to any newer stage, since it does not contain a single fossil identical with living species.-On the other hand, we find in N. Tippah, on the border of the cretaceous formation, a limited stratum of siliceous sandstone, undistinguishable, lithologically, from that found on the territory of the Siliceous Claiborne stage, underlaid and overlaid by gray Lignitic clays, similar in all res- pects to that of the rest of Tippah, and connected with the latter by numerous outcrops, although the stratum is not strictly traceable. The rock mentioned contains Venericurdia planicosta!, Cardium Nicolleti?, and other fossils, appa- rently peculiar; whence it appears that this estuary deposit, at least, is of eocene age-and with it, we should naturally presume, the rest of the lignitic clays of Tippah and Pontotoc, whose highest strata frequently exhibit a ledge of rock of a similar character, in which ill preserved remnants of marine fossils are occasionally, though rarely, found, together with grains of greensand (¶166). Near Shongalo, Carroll county, also, there occurs a deposit of marine origin, with fossils corresponding to the Claiborne stage, which is certainly underlaid, and probably also overlaid by lignitic clays, the territory of which surrounds it on all sides (see map). The imperfect state of preservation of most of the fos- sils of the estuary deposit of Tippah, just mentioned, render its identification with any particular stage of the eocene somewhat difficult.—It appears, how- ever, from extensive comparisons made by Prof. W. D. Moore, of the number of ribs found in Venericardia planicosta from different geological horizons, that the average number of ribs in that fossil decreases in proportion as we descend in the series; as exhibited in the following table : 110 [T164, 165 GEOLOGICAL REPORT. (Paris.. Lower Vicksburg? stage. Claiborne stage. Jackson s age. .. Siliceous Claiborne (lower). .. 36) 34 to 35 31 to 34 26 to 30 (Conrad) .25 to 26 The latter numbers (viz : 25 to 26) are also those of the fossil occurring in the estuary deposit of Tippah; affording an additional presumption in favor of the lower eocene age of the bed in question. Leaving open the question of the age of these Lignitic strata, until settled, perhaps, by a comparison of the floras, I shall comprehend under the head of the "Northern Lignitic", as a whole, all the beds found on the territory N. of the line of the marine Tertiary, and W. of the Cretaceous. I. THE NORTHERN LIGNITIC GROUP. 164. The territory occupied by this group-marked on the map by the lighter shade of brown--is generally hilly, with the excep tion of the level belt immediately bordering on the cretaceous for- mation--the "Post Oak Flatwoods," which will be more specially described in the Agricultural Report. In these, the material of the Lignitic formation itself (generally in a disintegrated condi- tion), forms the surface; on the rest of the territory, the Orange Sand generally overlies the latter thickly, having been, as usual, deposited on a deeply denuded surface, whose hills and valleys cause great irregularity in the occurrence of outcrops, as well as uncertainty, in many cases, as to the very existence of the lignitie formation, unless accidentally demonstrated by deep borings. Nevertheless, there are extensive regions in which these strata appear at and above the level of the drainage, forming the base of the hills, and the beds of the streams; and being, very generally, the water-shedding stratum. 165. In the Flatwoods, and the hills immediately adjoining them to the westward, the materia of the formation is usually a hard, gray or whitish clay, sometimes laminated, but more usually of a massy cleavage, with a tendency to conchoidal or nodular forms, which are conspicuous in most of the outcrops found on whitened hillsides in the Flatwoods. This clay shows but little ten- dency to disintegrate by the atmospheric agencies alone; it does not "slake" readily, so long as it retains its original structure, and hence, it is very generally worn into genuine pebbles by the streams. When however, it has once been broken up and worked into a plastic mass by mechanical means (as for in- stance by denudation and re-deposition, or in roads), it resumes this condition with extraordinary facility. Such is the nature of the surface material of the Flatwoods, obviously derived from the (originally hard and intractable) clays of the underlying strata, which it covers to a depth of from two to ten feet, form- ing, to a great extent, both the soil and subsoil. These surface clays possess a cleavage strictly massy, the cleavage planes being generally of a reddish tint; a rain falling on this mass, instantly converts it into the toughest mud. This toughness is rarely impaired through the presence of sand; the uncombined siliceous matter contained in the mass is usually in a state of fine division, and is to a great extent perhaps derived from subsequent infiltration with siliceous solutions, which evidently have been active within the mass after its deposition. For not only do we often find the clay itself indurated into a claystone of con- siderable hardness, through the intervention of a siliceous cement, but we fre- 166, 167, 168] NORTHERN LIGNITIC-CLAYSTONES. 111 quently meet, within the mass, irregular veins and lenticular sheets of a very hard, gray or brown siliceous rock (at times almost a pure hornstone, at others consisting in part of clay), whose drusy, nodular surface plainly shows its origin. 166. Stratified claystones (6 to 18 inches in thickness) are of common occurrence at or near the top of the Lignitic strata of Tippah and Pontotoc, at no great distance from the border of the cretaceous formation. These clay- stones sometimes differ from the clay itself in little else than their greater hardness, but usually they are somewhat sand, and contain numerous black grains-in some instances, grains of greensand. Through these claystones, every degree of lithological trans.tion from the pure, almost white clay, to the fossiliferous san Istone of N. Tippah (¶168) may be traced, and careful exami- nation will sometimes detect in them unequivocal remnants of marine fossils. Such is the case with the (glauconitic) claystone overlying the lignitic clays at Mr. Brougher's place, S. 7, T. 5, R. 2 E., Tippah county, and at an outcrop a mile W. of Pontotoc. At the latter place a Tarbinolia! and part of the nucleus ol a Natica? was found, with other impressions too indistinct to be recognized; at the former. the exterior cast of a small, deeply ribbed Venericardia ? or Arca? I have not met with any of these claystones on the territory of the Northern Lignitic S. of the outcrop mentioned, near the town of Pontotoc. Thence S. to the Succarnoche River, I have seen only the whitish "Flatwoods Clay;" where the latter is massy or nodular, it rarely contains unequivocal signs of vegetable fossils. Westward of the Flatwoods proper, however, the clays are commonly laminated, less uniform in their character, and interstratified more or less with sand. Such usually are the clays associated with the lignite beds, and containing impressions of leaves; nevertheless, the genuine "Flatwoods Clav" character frequently re-appears, locally, over the whole region. 167. The greatest deyersity of material generally obtains in connection with the Lignite beds. They are usually overlaid, and sometimes underlaid also, by yellow sands, or sandy clays, or numerous alternating layers of these materials, often strongly lignitic themselves, and correspondingly dark colored. On the other hand, pure, refractory, blue or green clay, of a massy cleavage, and void of sand, is sometimes found associated with the lignite beds, and especially as forming the subjacent stratum. A special description of the lignite beds will be found under the head of the Useful Materials of this group (T252, ff.). Within the light colored, laminated clays of this formation, are not unusually found rounded masses, from the size of a mans head to that of several bushels, of a black substance so much resem- bling ston--coal, as to render it undistinguishable, at times, even to a practised eye. It is a kind of bitumen, similar to that found sometimes in the Rotten Limestone; in the fire it is semi-fused like Cannel coal, swells and burns with a brilliant, smoky flame, producing a light, spongy coke, which burns with difficulty, leaving but very little, white ash. A more eligible material for the manufacture of illuminating gas could scarcely be procured; but thus far, no continuous deposit of this substance has been discovered. Among the locali- ties where it has been found, I may mention: Mr. Brougher's place, S. 7, T. 5, R. 2 E., Tippah county; Dr. John Thompson's, S. 8, T. 12, Ŕ. 2 E., Calhoun county; Mr. Madison Carr's, S. 6, T. 11, R. 5 W., Yallabusha county; between Sun Creek and Trim Cane Creek, in Mr. Dillon's neighborhood, Ocktibbeha county. 168. Localities of the Northern Lignitic Group.-Near Mr. David Reeve's, S. 36, T. 1, R. 3 E., N. Tippah county, we obtain, along the bed of a branch, the following section : 112 [7169 GEOLOGICAL REPORT. (Sec. 16.) SECTION OF THE LIGNITIC STRATA, AT D. REEVE'S, N. TIPPAH. FEET. CHARACTER OF STRATA. Orange Sand-Hilltops. 1? Red Shale, non-fossiliferous. 4? Gray laminated clay, washing into pebbles-non- fossiliferous. 3 Clay-sandstone, spotted blue and yellow, with green- 2 sand dots. Venericardia planicosta, Cardium Nicol- leti?, Trochus, Ostrea, etc. 1 Gray laminated clays--not visible at the outcrop, but struck in wells in the neighborhood, after passing through the rocks; below the clay, white, water-bearing sand. 2 The precise thickness of Nos. 3 and 4 could not be ascertained, from the overlying detritus. No. 4 is precisely similar to the fossiliferous shale at Hurley's schoolhouse (T170, Sec. 17, No. 2), but like the underlying clay, of which it is probably a metamorphosis (T41), is without fossils. The same rock, as No. 2 of the preceding section, occurs on a ridge on the E. side of Muddy Creek, on SS. 16 and 17, T. 2, R. 4 E. Here a ledge quite similar to that at Revees' but with only here and there an imperfect fossil, appears on the summit of the ridge, jutting out in an abrupt hillock at its northern end, whence it dips south- ward and crops out on the hillside for a mile, disappearing about 30 feet below the summit of the ridge, which consists of Orange Sand. A lower ridge, inter- vening between the one just mentioned, and Muddy Creek, shows bald hilltops consisting of a tough gray clay soil, underlaid by gray laminated clay. 169. In the country on the heads of Muddy Creek, Wolf River and Tippalı Creek, in TT. 2 and 3, RR. 2 and 3 E., outcrops of the gray nodular "Flat- woods Clay" are very common on the hillsides, which often appear quite similar, at first sight, to the "bald prairie spots" of the Rotten Limestone country. Several outcrops of this kind occur on the Ripley and Salem roads, and they are com- mon in the bluffs of streams. On S. 29, T. 3, R. 3 E., (Squire Street's) there is a bed of lignite-which, however, I had no opportunity of observing personally. In townships 4, 5 and 6, ranges 1 and 2 E. (S. W. Tippah), we generally find the clays laminated rather than nodular, frequently interstratified with sand, and rarely destitute of vegetable remains--which, however, as a general thing, are poorly preserved. Characteristic outcrops of this kind occur on Ocklimita Creek. Thus on S. 33, T. 5, R. 1 E., near Hickory Flat, there is a bluff about 70 feet high, which consists of alternating strata, from 1/4 inch to 2 feet in thickness, of gray and brown clay, sand, and sandy clay; the whole overlaid by a few feet of Orange Sand. The strata here show a slight westward dip; in a small outcrop on S. 35, the dip is 15 deg. W. b S.-which is probably, however, owing to a local fault.-Higher up on the Ocklimita, above the crossing of the Hickory Flat and Ripley road (about S. 8, T. 5, R. 3 E.) the bluffs exhibit the following section: 5 сл NO. FEET. INCHES ¶170] NORTHERN LIGNITIC IN TIPPAH. (Sec. 17.) SECTION AT À BLUFF ON OCKLIMITA CREEK, W. TIPPAH. CHARACTER OF STRATA, 192 15 Orange and Yellow Sand, with ferruginous to 4 20 sandstone and large pieces of silicified wood. 2 Small fragments of silicified wood, imbedded in to 6 a soft mass consisting of sand and comminuted 3 silicified wood. Large white quartzite pebbles, with sand. 2 Gray clayey sand, with traces of fossil leaves. 1 Large fragments of silicified wood, the centre of which is black, lie in the bed of the creek; whether derived from stratum No. 1, or from the sand above, does not appear. 170. About 2 miles E. of this locality, at Hurley's schoolhouse, on a ridge, we obtain the following section: (No. 18.) SECTION AT HURLEY'S SCHOOLHOUSE, W. TIPPAH. FEET. CHARACTER OF STRATA. Orange Sand hilltops, with the common ferruginous 15 sandstone, and a few fragments of the white siliceous rock with fissures resembling grass leaves. 3 Fine grained red shale, hard, with impressions of leaves an the cleavage planes-Salisburin, Populus rhomboidea, Morus, Ficus, Laurus, Olea Américana, Cornus sericea, Rhamnus, Terminalia, Magnolia rotundifolia, LESQX., M. accuminata, MICHX., Rhus, Quercus, Carya. Blue clay, similar to e of Diag. No. 5; forming the body of the ridge. 3 According to O. Davis, Esq, of Ripley, red leaf-bearing shales, probably of a similar character, occur on S. 8, T. 2, R. 2 E., about 5 miles S. E. of Spring Hill, Tippah county; fragments of a similar rock I have ol served myself, N. of Tippah "reek, in T. 4, R. 1 E. H. A. Gwyn, Esq., of Saulsbury, Tenn., NO. NO. 113 R-8 114 [T171, 172 GEOLOGICAL REPORT. } possesses fine specimens of leaves occurring in a red, micaceous, schistose sand- stone, near Gov. Matthews' place, in N. E. Marshall county. Of the precise position of the rock in these localities, I am not informed. All of them are probably metamorphoses of different materials of the Lignitic forma- tion, by means of ferruginous solutions derived from the Orange Sand. 171. The following section, from a bluff in T. 6, R. 1 E., on the Corners- ville and Hickory Flat road, as well as that mentioned as occurring near the latter place on Ocklimita Creek, will give a fair idea of the character of the outcrops observed in S. W. Tippah and S. E. Marshall. (Sec. 19.) SECTION OF LIGNITE STRATA, FROM AN OUTCROP IN T. 6, R. 1 E., TIPPAH COUNTY. 1 FEET. INCHES CO 3 CHARACTER OF STRATA. Gray sandy clay with conchoidal cleavage, non- fossiliferous. NO. ON ** Black laminated clay with impressions of leaves, and a seam of lignite at the base. 2 00 Blue massy clay, non-fossiliferous, same as No. 1 of Sec. 18, and lowest stratum of Diag. No. 5. This section also represents faithfully numerous outcrops in S. Lafayette, and N. Calhoun counties-some sections, however, exhibit nothing but sharp, yellow sand, with faint impressions of leaves. The region in which the above section occurs, is remarkable for the number and large size of the ferruginous nodules occurring on the surface of the formation (T42); silicified trunks, also being very common in the same position, and remarkable for the perfect preser- vation of their vegetable structure. 172. At Rocky Ford, Pontotoc county, the S. bank of the Tallahatchie River contains an exposure of about 12 feet of black, very micaceous, sandy, laminated clay, passing in spots into a soft micaceous sandstone. In the upper portion of this mass (which is overlaid by Orange Sand capped with white siliceous sand- stone-T58) there are large, flattened ferruginous nodules. The outcrops in ranges 1 E. and 1 W., in Pontotoc and Lafayette, are merely repetitions of those just mentioned, while R. 2 E. is occupied chiefly by the Flatwoods. W. Marshall, and N. and W. Lafayette, exhibit chiefly the Orange Sand strata, though here and there a deep well reaches the "black dirt," yielding fetid water. In S. Lafayette, however, on the waters of the Yockeney- Patafa, the lignite formation is well developed; as also in Calhoun and E. Yallabusha. The following section occurring on the Yockeney River, S. T. 9, R. 3 W., will serve to characterize the strata of that region : 9173] LIGNITIC OF LAFAYETTE. (Sec. 20.) 115. SECTION AT PRICE'S OLD MILL, ON THE YOCKENEY RIVER. `· 8 8 FEET. INCHES 12 to 16 CHARACTER´OF STRATA. Orange Sand--hilltops. Sandy transition layer, with ferruginous nodules. Whitish clay of nodular cleavage ("Flatwoods Clay") without leaves; passing into Dark colored, bluish clay, thickly laminated, with obscure remnants of leaves. Dark colored, fetid, lignitic clay, with seams of 1 3 lignite. 8 to 10 Black clay, somewhat sandy, with traces of leaves. NO. 5 cr 3 N | Lignite-thickness not ascertained-bed of river. | 1 Lower down, on Dr. John Taylor's land, S. 30, T. 9, R. 3 W., the lignite crops out, 2 to 3 feet thick, a little above the bed of the river, which is formed by a tenacious blue clay-probably No. 1 of Sec's 18 and 19. 173. Higher up, also, on the heads of the Yockeney, lignite is found. A bed said to be 8 feet thick occurs at Mr. Vineyard's, S. 1, T.10, R. 1 W.; it is found: in wells in T. 9, R. 2 W., and also on branches of Potlockney Creek, in-T. 10, R. 2 W., where I have had an opportunity of examining it. It crops out in bluffs and gullies on Hughes' branch, on S. 8, T. 10, R. 2 W., overlaid by some 30 feet (as far as visible) of sharp yellow sand with ferruginous veins. The sand, which is evidently a member of the lignite group, occurs in many bluffs in the neighborhood, and sometimes contains impressions of leaves. In a branch near Mr. S. Ragland's, on S. 9, T. 10, R. 2 W., there is an outcrop of great interest, of which Diagram No. 5 will convey an idea. The stratum of greenish-yellow sand at a contains impressions of leaves, chiefly of a Cinnamomum not unlike the Sassafras. c is a bed of yellowish white clay of irregular, or thickly laminated cleavage, containing numerous leaves of a Sabal, also a variety of other, chiefly dicotyledonous plants, among which a Quercus and Ficus?, which seem to be identical with species found in the red shale of Tippah. In the yellow sand at d, immediately overlying the clay stratum, there occur large billets of silicified wood, the interior of which is black. The bed of the branch on the N. half of the bluff, is formed by blue clay e, of massy cleavage, similar to No. 1 of Sec.'s 18 and 19, which appears to underlie horizontally. The N. dip of the strata of the outcrop seems, therefore, to be owing to a fault or landslide. The yellow fossiliferous sand found in other localities in the vicinity, is high above the level of the leaf bearing clay stratum of this diagram. In the sands just mentioned, there frequently occur ferruginous, rust-colored stripes, which at first sight appear to be stratification lines, since they very commonly run parallel to the latter. Sometimes, however, these stripes exhibit fanciful undulations and contortions, and would lead the observer to suppose 118 GEOLOGICAL REPORT. [174, 175 лов (No. 5.) Section of Lignitic strata at Ragland's Branch. that the stratification is exceedingly irregular, but for the fact that they may at times be found crossing the true stratification lines. The dotted lines in the accompanying diagram exhibit these stripes. b is two masses of gray sandy clay vertically laminated, imbedded in regularly stratified sand. In the same township (T. 10, R. 2 W.) lignite has been struck in numerous wells (¶263). 174. Outcrops similar to those exhibi- ted in S. W. Tippah and S. Lafayette (see sections 19 and 20) are of constant occurrence in N. Calhoun. These strata are, of course, frequently struck in wells, and are known under various names, as black or blue "dirt" or "mud"; leaves referred by the people to various living trees, also “palm leaves" (Sabal), and even "acorns" and hickory-nuts" have been often reported as having been found. The wells at and noar Sarepta, especially, have furnished many ex- amples of this kind; no specimens of which, unfortunately, have been preserved. In a well on S. 28, T. 11, R. 1 W. (Mr. Hunter's), there was found, besides the leaf bearing stratum, a trunk of a tree, round, but lignitized. 175. I have not personally examined the portion of Calhoun county lying S. of Loosha- Scoona River, but according to all accounts, its geological phenomena do not differ essentially from those just described N. of the Scoona. According to L. Harper, the lignite stratum which crops out near the town of Pittsboro, has there in some wells been found to be 30 feet in thickness.-The most westerly range of townships in Chickasaw_county, is occupied almost entirely by the Flatwoods, with their characteristic materials, described above. • The E. portion of Choctaw county is in most respects a copy of Calhoun and S. E. Lafayette, though on the whole the Orange Sand ridges, underlaid by the lignitic strata, are lower, and the soil more fertile, pine being usually absent; here also, the line of the lignitic strata is generally marked on the hillsides, by ferruginous nodules. Outcrops of dark colored, laminated clays occur near Bellefontaine; also one of a hed of lignite; the same strata are struck in wells, and in one of these, a round lignitized trunk was found. S.licified wood is abundant in the overlying Orange Sind strata. On the higher ridges, such as that on which Greensboro' is situated. wells 40 to 60 feet deep still remain within the Orange Sind; but S. of Greensbo10', on the Bankston road, and at the latter place itself, the Lignitic strat. of the same facies as those seen in N. Calhoun, are near the surface and crop out in the branches, although I have not • ¶176, 177, 178] LIGNITIC OF CHOCTAW-WINSTON. 117 ascertained the occurrence of lignite proper in that immediate neighborhood. Beds of lignite occur, however, eastward of Bankston, in several localities (¶265), forming generally the water-shedding stratum. While the lignite at Mr. Bridges' is solid and shows woody structure, being evidently derived from forest trees, that in Mr. Wood's neighborhood seems to be composed of indefi- nitely shaped fragments of wood, roots and leaves, chiefly endogenous-the deposit perhaps of a bog or swamp, intermingled with clay, and crumbling to pieces in drying. In both places, the lignite stratum is overlaid by gray clayey sand with bits of leaves, similar to that observed on Ocklimita Creek, (No. 1 of Sec. 17, 169). Silicified wood is very cominon in the Orange Sands of the region. To the eastward, in Ocktibbeha county, the flatwoods are said to present precisely the same features as further N. 176. The mineral waters at Black's Wells, Chocktaw cou ty are derived from divers dark colored clays and sands overlying a lignite satum, which was struck and passed through-4 feet thick-in deepening a well which at first yielded a strong sulphur water; the latter suddenly disappeared, during a thunderstorm, leaving freestone water behind. In spite of 1e,eated borings all around the well, the sulphureous vein has not as yet been recovered. The whole of Winston county, as well as N. Neshoba, appears to be under- laid by a stratum--or perhaps several-of lignite, of very variable thickness; from 2 to 12, on an average, 4 to 5 feet. In N. W. Winston, this stratum is found in wells, overlaid by sand and leaf-bearing clays of irregular cleavage, similar to that found on Ragland's branch (¶173).—A good locality for obtaining specimens of the fossil flora, is at Mr. Wm. R. Coleman's mill, near New Pros- pect P. O., on S. 35, T. 17, R.40 E., where the bluff of the pond consists of yellowish, somewhat sandy clay of irregular cleavage, in which the leaves occur as impressions of a deep brown tint. Here the leaves of a Cycas !, a Smilax? and other plants are abundant (Locality c. of General Section). 177. On the heads of the Noxubee River, in N. E. Winston, lignite is also abundant; it is found in wells, crops out in the branches, and on hillsides— which wou'd seem to make pro: able the existence of several successive strata of this material. A few years ago a bed of lignite which cropped out on both slopes of a ridge, about 5 miles E. N. E. of New Prespect, took fire from the burning of the woods, and kept burning for twelve months, during which time, the "burning hill" was quite an attraction for the curious. At Louisville, shallow wells are obtained in the Orange Sand before reaching the lignite strata; the deeper wells, however, pass through gray and black clays and beds of lignitic 2 to 10 feet thick; lignitized trunks retaining their rounded shape, have also been found in the region. Fine impressions of leaves are fre- quently found in these wells; in one dug at the residence of G. G. Si e lecor, Esq., of Louisville, a stratum of grayish-red, fine-grained 10ck, 8 feet thick, was found at 28 feet, most of the overlying material being gray clayey sand of a laminated structure. The rock resembles closely the ferruginous shale of Hurley's Schoolhouse (T170) and contains beautiful impressious of exogen- ous leaves. 178. In S. E. Winston, S. W Noxubee, and N. W. Kemper, high ridges of Orange Sand conceal entirely the Lignitic formation, until we reach the s ope which descends into the Flatwoods, where lignitic clays are met with half-way up the hillside, with ferruginous nodules, etc., but no lignite. The character of the Flatwoods, however, is the same as ever. Similarly we see the lignitic clays outcropping on the E. slope of the DeKalb ridge, and according to L. Harper, a bed of lignite 3 to 4 feet thick crops out a few miles N. W. of De Kalb; but on that ridge itself nothing but Orange Sand is to be seen for some distance S. of Dekalb. On the waters of Patickfaw Creek, however, dark colored clays appear on the hillsides, with ferruginous nodules. Near Blackwater P. Ó., a soft yellow sandstone containing white shells, was said to have been struck at 40 feet, in a well; the ledge was a few feet in thickness, below it "black mud Work 118 [7179 GEOLOGICAL REPORT. § • appeared and at 60 feet water was obtained in sand. Lignite is said to be found in the neighborhood in several places. At Daleville, lignitic clays are near the surface, and appear. more or less, all the way to Marion, Lauderdale county, where we reach the northern edge of the marine Tertiary, as given on the map. On Sowashee Creek, 2½ miles N. of Marion, we find on a hillside the following section: (Sec. 21.) SECTION ON SOWASHEE CREEK, LAUDERDALE COUNTY. @ 0 0 FEET. INCHES CHARACTER OF STRATA. Orange Sand-hilltop-with a log of silicified wood. 1 20 20 Greenish-yellow sand, sharp, somewat lami- nated; gradually passing into the upper strata. 6 Layer of ferruginous nodules. Gray laminated clay, alternating with sand. § | 1| 6| Earthy lignite. 8 Gray laminated clay alternating with sand. 1 Silicified wood is very common all over N. Lauderdale. 179. The fossiliferous sandstone containing Venericardia planicosta, Monoceros, and other fossils of the Claiborne Group, is found on or near the summit of the ridge at Marion; while wells dug on the ridge penetrate into lignitic clays and lignite beds. In a deep cut on the N. E. & S. W. Alabama R. R., E. of Marion, on Mr. Spear's contract, the Lignitic formation underlying the fossilife rous sandstone, exhibits the following section : 4 сл 5 NO. 6 T180 LIGNITIC OF LAUDERDALE-NESHOBA. (Sec. 22.) SECTION AT SPEAR'S CUT, LAUDERDALE COUNTY. to 0 ооо crco FEET. INCHES 3 CHARACTER OF STRATA. Loam and Orange Sand, with ferruginous nodules below. 5 3 • Yellow, sandy, laminated clay. NO. 9 8 • 1.1 8 3 to 4 9 18 § | 1 10 Massy, yellow and whitish sand, with ferrugin- ous dots. Blue clayey sand, on exposure becoming covered with persulphate of iron. Upper portion yellow, in thin layers, with a fluted exposure. Massy, gray, sandy and micaceous clay, lignitic above, and sometimes containing casts of a Venericardia? 10 Solid Lignite. Gray laminated clayey sand, with specks of lignite, fragments of branches, etc. In its upper portion becomes strongly lignitic. | Lignite. Bluish clayey sand, alternating with layers of "Flatwoods Clay." In this bed there occur at times large nodules of gray, radially crystallized calcareous spar. No fossils. 7 6 LA 4 ~ In a well bored at Marion Station, 2 miles W. of Marion, on the M. and O. R. R., strata similar to these were penetrated for 425 feet, when a ledge of hard sandstone 18 inches thick was struck, then 1 foot of bluish sand, then 1 inch of hard rock, then bluish clayey sand with comminuted shells-a sandy marl— and thereafter at 450 feet a bed of shells--chiefly oysters, judging by the fragments-in loose siliceous sand, about 5 feet thick; then blue clayey sand to 475 feet, when a very micaceous sand was bored up, to 480 feet. The material before me is insufficient to determine whether or not these shells are tertiary; but it is likely that they should be so, since the cretaceous formation (which might have been reached here) in this latitude, and far above, shows no trace of similar materials. 180. Of the geology of Neshoba county, I possess but few data-derived, in part, from a hasty trip in autumn 1855, the field notes of which, with others, have disappeared. The Orange Sand formation is said to be very largely developed N. of Pearl River, forming some of the highest ridges in the State. I have reliable information, however, of the existence of lignite beds and "black dirt" in the N. part of this county; while in the S. portion, we find a yellow or white, soft sandstone, sometimes showing transitions into claystone, in which fossils of the Claiborne stage appear (¶1902 ). Its resemblance to the fossilife- rous rocks both of S. Lauderdale, and Tippah, is very striking. 119 120 [9181, 182 GEOLOGICAL REPORT. Of Leake county I know nothing as yet, save that in its N. W. corner, near Thomastown (as in a large portion, at least, of Attala county), fetid gray clays, yielding saline anl purgative waters, o'ten impregnated with sulphuretted hydrogen, are found in wells at no grз it depth (30 to 50 feet). The same is true of the adjoining portions of Madison county, where, although outcrops are very scarce, I have hid the opportunity of examining the material freshly dug from wells-as at Mr. R A. McMillans, S 33, T. 13, R. 5 E, where at 28 feet, beneath the Orange Sind, fetid laminated clays of various dark tints, with vesti- ges of leves, and small crystals of gypsum-interstratifiel, more or less, with dark-colored sinds, were struck, and water obtained in a stratum of black sand at 47 feet. The material is absolutely identical with that observed at Vaiden, in the deep cut (T183), and the same is found only a few feet beneath the surface, in many points in N. Holmes, e. g., at Rockport. 181 Further E, we find in several cuts on the N. O., J. and G. N. R. R. (e. g. on S 29, T. 12, R. 5 E), dark colored, fetid clays, charged with iron pyrites, and containing numerous small layers and veins of glossy lignite. Where these alays are exposel to the atmosphere, they speedily become covered with a white efflorescence, which sometimes also appears in fields, on the surface soil,—a mixture chiefly of copperas, alum, and gypsum.--The same strata are struck in wells, and give rise, probably, to the mineral waters of the "Artesian Springs." No regular beds of true lignite, so far as known, have been struck in this region, but such beds are found in Yazoo (according to L. Harper), W. Holmes, Carroll, Yallabushi and Panola, an'l probably also in DeSoto county. Of the Lignitic formation, as it exists in the country bordering on the Mississippi bottom, I cannot speak from personal observation. According to information obtained from intelligent inhabitants, and observations quoted in various places in L. Harper's Report, the character of the lignitic strata of that region coincides closely with that observed further E, and it would seem that through the counties of Marshall, Lafayette, Yallabusha, Carroll and Madison, an immediate connection of the Lignitic of the interior with that of the Mississippi bluff, can be traced. In a single locality (S. 27, T. 9, R. 4 W., Yazoo county), an outcrop mentioned by L. Harper (Report. p. 168) offers a phenomenon not observed elsewhere, viz: a stratum of lignite underlaid by pebbles; on the strength of which, he considers the whole of the Northern Lignitic as being geologically connected with the Orange Sund-to which, for the rest, it shows no more special relation than to any of the other formations of the State. He does not describe the character of the pebbles, nor does it appear that special care was taken to ascertain beyond a doubt, the important fact that the pebbles were in their original place, and that a case like that figured by him on p. 50 (copied from my field notes) was out of question. Siliceous pebbles, however, occur in the fossiliferous sandstones of §. Neshoba; so that, even if the facts as alleged by L Harper should be substantially correct, they would prove nothing against the probable supposition of the equivalence of the lignite stratum of the Mississippi bluff to those of E. Mississippi. They may, nevertheless prove to be an independent formation.- Oak and hickory leaves, and acorns associated with fragments of lignite, are said to have been found in wells in W. Panola, Carroll and W. Holmes; the aame has been the case in N. Marshall and in DeSoto, in several localities. Generally, however, the Orange Sand, represented largely by the pebble beds, appears to be the prevalent formation even to great depths, in this region. 182 The character of the formation in E. Yallabusha has already been men- tioned (¶174) as being similar to that of N. Calhoun. In the central portion (N. and S) of the county, lignite does not seem to occur; gray or white clays, laminated, and more or less sandy and micaceous-often resembling, at first sight, the Rotten Limestone, and not unfrequently claimed as such by the inhab itants-and gray sand, form the usual material of the outcrops, which are by no means abundant. W. of Water Valley, in Mr. Madison Carr's neighborhood, white laminated clay appears on hillsides falling off towards Otuckalofa Creek ; : ‚¶163] LIGNITIC OF YALLABUSHA-CARROLL. . 121 in bluffs on the banks of the latter stream, gray sand appears. The wells at Coffeeville have freestone water, but a short distance W. of town, wells strike "black dirt" and poor water. Traveling S. we next meet an outcrop on the S. bluff of Okachicama Creek, the steep hillside being altogether denuded of surface material, and exhibiting some 30 feet of laminated clay, which is gray while wet, but when dry almost white. Like the clay of the Flatwoods, when once disin- tegrated, it readily forms a highly tenacious mud, which has given some un- pleasant notoriety to this hillside, among the waggoners. This clay is found for about a mile each way from the crossing, on the banks of the creek; but wells dug on the ridge prove it to be only a very narrow band, since it is struck no more a few hundred yards S. of the creek, at 50 feet. Very shallow wells prove the impervious clay to be not far from the surface on Perry's Creek, on the S. side of which it crops out, not far above the crossing of the Coffeeville and Grenada road. Near Grenada, according to L. Harper, dark, laminated, micaceous clay crops out on S. 13, T. 22, R. 4 E, giving rise to an alum spring. 183. Little else than Orange Sand is to be seen in N. Carroll, along the line of the M. C. R. R. A few miles N. of Middleton, however, we hear of “blue dirt” in the wells, and it appears in these, as well as in a few outcrops, between Middleton and Shongalo. Near the latter place, at Vaiden Station, we find in a R. R. cut, associated with gray and brown clays more or less lignitic and gypseous, a mass composed of sharp, coarse siliceous sand and grains of glaucon- ite, cemented by hydrated peroxide of iron, with more or less clay, and contain- ing numerous impressions of shells, apparently of the Claiborne Group. The position of the strata in this interesting locality cannot, ut fortunately, be very clearly observed, in consequence of the southward ascent of the grade of the R. R. from the two small cuts containing the ferruginous greensand, towards the deep one in which the gray ignito-gypseous clays appear, so as to leave unexposed the line of contact between the two materials. There can, however, be little doubt that the fossiliferous deposit is both over-and underlaid by clays like those exposed in the deep cut at Vaiden; for while, in the latter, they occur at a level considerably above the fossiliferous strata, and are without any perceptible dip, wells and cisterns dug at the stat on find, at a level far below the latter, nothing but clays precisely similar to those in the deep cut-of brown and gray tints, with rosettes and laminæ of gypsum, frequently incrusted with a yellow ferruginous mineral (Yellow Iron Ore, 224). In the middle cut, the coarse, glauconitic, dark orange-colored, ferruginous sandstone forms a pretty uniform stratum about 3 feet thick; it is in this that the fossils are most abundant. These are preserved as impressions and nuclei only, among which, thus far, the following have been recognized : Nautilus zigzag ! Ostrea divaricata, LEA! Venericardia rotunda, Lea ! Cardium Nicolletï, CON. ? Avicula. Voluta petrosa, CON. ! Dentalium. Turritella vetusta, LEA ? Terebra venusta, LEA ? Solarium. Underlying this rock, and in the cut adjoining northward, alternating with it, there occurs a stiff amorphous clay, with sarp sand and some greensand grains, also of a deep orange tint, and exhibiting traces of fossils. These materials also contain, both in these cuts and in some further N., variously shaped ferruginous concretions, whose shell is of limonite character, and filled usually with fine yellow ochre. The peculiar deep tint of the heavy subsoil in several localities in this neigh- borhood, (contrasting strongly with the unusually pale tint of the post-tertiary surface loam commaly seen in S. Carroll), renders it evident that the red clay above mentioned, has contributed to form the same. No other outcrops, how- ever, seem to occur in the immediate neighborhood; but cuts exhibiting similar materials occur on the R. R., between Vaiden and Rockport. 122 [T184, 185, 186 GEOLOGICAL REPORT. 184. In the bed of Peechyhaly Creek, S. of Shongalo, on S. 2 ?, T. 16, R. 5 E., there occurs, associated with blue clayey sand, a soft sandstone, mottled blue and yellow, very closely resembling that of S. Neshoba and Lauderdale; no fossils were, however, discovered in it. Large billets of silicified wood have been found in the neighboring streams by Wm. Batey, Esq., in whose well on S. 35, T. 17, R. 5 E., laminated clay like that in the deep cut at Vaiden, with rosettes of gypsum, was struck at 28 feet, continuing, with little change of character, to 44 feet; a level fully as low, probably somewhat lower, than that of the ledge of rock in Peechyhaly Creek, in the edge of the bottom of Big Black River. Crossing the latter at Kirkwood's Ferry, about S. 11, T. 16, R. 5 E., we find on the S. side a steep bluff about 70 feet high, on which the following section is exhibited : (Sec. 23.) SECTION OF TERTIARY STRATA AT KIRKWOOD'S FERRY, ATTALA COUNTY. FEET. CHARACTER OF STRATA. 1 White siliceous sandstone, non-fossiliferous. NO. 3 | Yellow sand, grains rounded, no fossils—Orange Sand. | 6 2 Dark orange-colored, glauconitic sandstone--fossils as at Vaiden. 5 វ 30 Ferruginous sand, somewhat glauconitic, with few 3 fossils. 14 Gray laminated clay. 20 Yellow sand, without fossils. 2 1 The white siliceous sandstone, No. 7, which is very abundant on the ridges of N. Attala (T59), strews the hillside. 拳 ​185. The facts just stated, in connection with this section, can leave no doubt as to the fact, that the lignito-gypseous strata both overlie and underlie this marine ferruginous deposit, which is quite extensively developed in N. Attala, and acquires some practical importance through the large amount of greensand it contains; which not only renders some of its materials suitable as manures, but is also scattered through the heavy "red hills" soil of that portion of the county, rendering them both fertile and durable. In numerous steep gullies on the Shongalo and Kosciusko road, as well as on the bluffs of Zilfa, and both forks of Poukta Creek, the several materials observed on the bluff at Kirkwood's Ferry, crop out; and the fertilizing powers of the very sand deposits of these creeks (in which, of course, the greensand is concentrated), are already known and appreciated among the agriculturists of the region. 186. I have not traced out this formation in E. Åttala county, but have looked closely for traces of it in Winston. The deep characteristic tint of its materials, which is unmistakeable in the "Red Hills" of Attala and Holmes, again meets 7187, 188] GREENSAND DEPOSITS-ATTALA-HOLMES. 123 the eye in the subsoil of the "Noxubee Hills" in N. E. Winston, and, as an intermediate point, at Mr. Coleman's (¶176). The peculiarly sharp, unpleas- antly gritty sand which the red clay of this formation contains, seems to be recognizable at several points in the Noxubee Hills; as at Mr. Davis' mill on the Noxubee River, where on a hillside we find, overlying the white laminated clays of the Lignitic, a singular conglomerate, consisting of pebbles of the latter clay, sometimes several feet in diameter imbedded in a dark orange colored, gritty clay, resembling greatly that of the Shongalo strata. The conglomerate as such, I suppose to belong to the Orange Sand Formation, under the head of which, but for their intimate connection with the fossiliferous strata of N. Attala, these phenomena would more properly have been noticed. The pro- clivity of the Orange Sand to appropriate the materials of other formations, I have already sufficiently exemplified. At the outcrop on Sowashee Creek, as well as in other intermediate localities, a similar state of things obtains. It would therefore seem, that the marine deposit of which we find an outlier at Vaiden, and the main body in N. Attala, originally covered a much greater area, but has been greatly denuded during the Orange Sand period. 187. I have not found any indications of this formation much S. of the S. prong of Poukta Creek. At Kosciusko, the lignito-gypseous clays alone are struck in the wells (in one lately dug on Dr. C. B. Galloway's place, 5 ms. from the town, a bed of several inches of white fibrous gypsum has penetrated), and the surface material is of a pale hue. Nor do we find any trace of marine fossils S. of the Poukta, until we reach, at Canton, the calcareous strata of the Jackson Group. Whether or not any connection is traceable through S. E. Attala, and the adjoining portions of Winston and Leake, into the fossiliferous sandstones of S. Neshoba (T1902 ), still remains to be determined. I have been reliably informed that "red hills" similar to those of N. Attala, exist in N. E. Holmes. Moreover, I owe to C. G. Armistead, Esq., of Yallo- busha, information concerning the existence of a ferruginous rock containing marine fossils, on the waters of Wolf Creek, S. W. Choctaw county, which will probably prove to be identical with the Shongalo rock. In the wells bored in S. Madison, by the Rev. Mr. Lambuth (T322), the fos- siliferous marine strata of the Jackson Group were passed through at about 90 feet, after which, "blue dirt," with selenite, several ledges of sandstone, and a lignite bed of 40 feet thickness, were struck, but no more marine strata were reached at a depth of 415 feet. At Jackson, however, at the Penitentiary well, after passing through 32 feet of surface material and fossiliferous strata of the Jackson age, Lignitic clays were, penetrated for 418 feet, after which, a bed of shells 20 feet thick, extremely rich in greensand, was passed through into water bearing sand. The friable shells brought up by the auger are too much com- minuted to allow of determination.-Whether this bed is a continuation of the Shongalo deposit, or an independent basin or estuary: there can be little doubt that it, also, is of the Claiborne age. II. THE CLAIBORNE GROUP. A. THE SILICEOUS CLAIBORNE STRATA. 188. The character of the rocks of this group has already been mentioned in connection with the Northern Lignitic Group, of which, in analogy to the deposits of N. Attala, it seems to form, as it were, a subordinate member. Its fossiliferous, aluminous (but rarely siliceous) sandstones, and claystones, do not impart any peculiar feature to the surface of the country, which bears as a general thing, the character of the Orange Sand Group. · 124 189. 190¹ GEOLOGICAL REPORT. Thus far, it is only in S. Lauderdale and N. Clarke, that I have examined the rocks of this group somewhat specially. At Marion, as before stated, we find a stratum only a few teet thick, of rather coarse sandstone, of variable degrees of hardness within its mass, and containing silicified fossils of the (lower) Claiborne age, overlying immediately the Lignitic strata, as seen in Spears' cut (179). Some portions of this rock are of excessive hardness, from others, the silicified shells can be picked by hand, and in weathering, the shells are left projecting above the surface, as in the Turritella Limestone of Tippah.. In view of the impossibility of obtaining fragments of any considerable size, of uniform hard- ness, the supposed adaptability of this rock to the manufacture of buhrstones is somewhat utopian. The softer varieties disintegrate very readily, and more especially under the influence of fire. It appears that many of the ridges in the neighborhood of Marion were once capped with ledges of this rock, as some are even now; for on some of these, especially W. of the town (as for instance, on S. 33, T. 7, R. 17, and ridges connecting therewith) we find imbedded in the soil and subsoil great numbers of silicified shells, which seem to have been gradually washed down from above. They are generally in a poor state of preservation, with the sole exception, perhaps, of Venericardia planicosta, of which I have obtained large, well preserved specimens at the locality mentioned; of the univalves (Voluta, Monoceros, Pyrula) only the columella is commonly preserved, and decay has often brought out prominently the lines of growth, where the rest of the sheil is extant. When freshly dug from the soil, these shells are often quite soft and friable, but harden by exposure. The so l is, of course, largely composed of the coarse sand which forms the body of the rock. 189. The rock is not on the whole very common in S. Lauderdale; it is com- monly found on the hilltops and crests of ridges, in limited deposits, the greater portion having, probably, been unable to resist the denuding agencies of the Orange Sund. The rock found at Marion, like that of Tippah, contains occasionally "galls" of gray, fine-grained claystone. On a hillside near the 10 mile post on the Marion and Quitman road, we find a solid ledge of this whitish claystone, about 6 in's thick, forming the top ledge of an outcrop of sandstone, some of which is very coarse, slightly glauconitic, and the sand-grains consisting apparently of chalcedony. Other portions of the rock resemble very much the spotted rock at Reeve's, Tippah county (¶168), and all are slightly fossiliterous. Southward of the point mentioned, these rocks are very common on the ridges-mostly, however, poor in fossils; consisting of ledges 6 in's. to 2 feet thick, each of which is slightly different from the others. Such is the case on the S. bluff of Dry Creek, where 18 feet of the rock appear, and here may be seen underlaid by a gray sand, similar to some seen at Spear's cut. S of the N. half of T. 4, R. 16 E, however, no more of the rock is to be seen; Orange Sand hills with Long-leaf Pine cover the face of the country, and deep wells reach nothing but yellow and red sand. 1901 Westward of the line of travel just described, we find a good opportunity for the study of this formation, on Chunkey Creek; in the cuts of the M. & Ố. R. R.; and on the banks of the Chickasawhay, at Enterprise. I regret being unable, in consequence of the disappearance of the field notes relating to it, to give in detail the highly interesting section occurring in a R. R. cut on S. 33, T. 5, R. 15, Lauderdale county, about 5 ms. N. E. of Enterprise. Here the white clay stone mentioned above is largely developed; as in the other cases, it forms the highest stratum, is sometimes seen in solid ledges several feet in thickness, and is remarkable, when dry, for its extraordinary lightness. Though not rich in shells, it contains fine casts of a Led, and of Cardium Nicolleti ?-In its upper portions, this bed passes into yellowish sandstone re- sembling that of S. Neshoba, and sometimes into a hard cherty rock, which forms huge, rounded nodules. Below it, at the N. end of the exposure, lies a green clay almost destitute of () 1902, 1911 CLAIBORNE STRATA IN NORTH CLARKE, 125 fossils; in this was found the supposed ovarium of a Pyrula (L. Harper's Rep., p. 149). Further S., however, we find intervening between this clay and the chert or claystone, with a rapidly increasing thickness and strong dip south- ward, a stratum of coarse greenish sand, whose grains consist mainly of chalcedony, and some greensand grains (see above). At this point, the stratum contains no fossils; it may be traced, however, thence to Enterprise, where we find it in the banks of the Chickasaw hay River, partly cemented by lime and teeming with fossils-chiefly Ostrea divaricata, Cardium Nicolleti, Venericardia rotunda, l'ecten Lyelli, and Scutella-and strongly glauconitic. The greenish clay found underlying it at the R. R. cut, is also present-as shown in the following section : (Sec. 24.) SECTION OF TERTIARY STRATA ON THE CHICKASAWHAY, AT ENTERPRISE, CLARKE COUNTY. FEEL. CHARACTER OF STRATA. 10 Orange Sand. Course glauconitic sand, frequently indurated by a 6 calcareous cement, with Ostrea divaricata, vomer, Cardium Nicolleti, Venericardia rotunda, Pecten. 10 Coarse ferruginous sand, glauconitic, with indistinct fossils. Green clay, apparently non-fossiliferous. Bed of river. 1 Bed No. 3 of this section is also seen in a branch W. of Enterprise, filled with Mortonia, and a similar one appears in Chunkey Creek, above Chur.keyville. 1902 I have mentioned above (187) the yellow aluminous sandstone of S. Neshobi. It is very poor in fossils at its northern edge, but becomes richer as we advance southward. The following shells occur in specimens derived from a locality near the S. line of Neshoba, on the Philadelphia and Enterprise road. Venericardia planicosta, Veneriçardia rotunda, Lea. Voluta petrosa, Con. Corbula gibbosɑ, Lea ? À Turritella--shell smooth, and remarkable for the small angle formed by the sides of its spire. The rock is sometimes of a uniform yellow tint, but more generally spotted with blue. and contains galls of indurate clay, like the sandstone of N. Tippah (¶162 ff.. 168). It occurs likewise in N. Newton, but I have no personal knowledge of its character there. There are several cuts of the Southern R. R. in this county, which from the accounts of the engineers must be highly interesting and instruc- tive, and contain fossilifer us rocks; I have not as yet had an opportunity of examining them. 191. Beds intervening between the siliceous and the calcarcons Claiborne strata. -I have not as yet been able to trace along the Chickasawhay river, the precise relation of the strata seen at Enterprise (the first in which carbonate of lime 2 3 NO. 126 [192, 193, 194 GEOLOGICAL REPORT. appears) to those which appear at Quitman. Little chance for observation occurs on the Enterprise and Quitman road, until within about 5 miles of the latter place, where we find outcropping in bluffs and on hillsides, strata resembling those of the Lignitic further N., consisting of alternating layers of gray and yellow sand, and gray and brown clay. Whether or not this stratum underlies the Quitman marls, intervening between them and the Enterprise strata, I have been unable thus far to determine with certainty; the outcrop occurring on the banks of the Chickasawhay near Quitman (see below) seems, however, to render this supposition probable. B. THE CALCAREOUS CLAIBORNE STRATA. 192. The area underlaid by this division of the tertiary is smaller, apparently, than that occupied by any of the other groups. I am not certain of its western limits, having examined it personally only in Clarke county, on the Chickasawhay and its tributaries. In the county just named, it does not give rise to any very striking peculiarities in the surface conformation. Though outcropping on the banks of streams, and in the valleys, imparting to these a more fertile soil and a forest growth indicative of the lime contained in the former, it does not, so far as I know, form any prairies--a fea- ture of constant occurrence on the territory of the Jackson Group. Not being in possession of any paleontological evidence concern- ing the counties of Scott and Newton, but learning that prairies do exist there, on which the bones of the Zeuglodon occur, I have upon analogy supposed the tertiary strata of these counties to belong to the Jackson Group, and have laid them down as such on the map, for the present. 193. The materials of this division consist, so far as I have seen, of blue, and white marls, the latter always sandy and often indurate. In both, all fossils except the oysters are very poorly preserved, so as to ren- der their recognition always difficult, often impossible. Its beds differ remar- kably, in this respect, from those of Alabama, so noted for the fine preservation of their fossils. The most northerly, and most westerly outcrop of the marl of this division, which I have seen, occurs under a bridge on Suanlovey Creek, W. S. W. of Enterprise. It forms the bed, and a foot or two of the bank, of the creek, for about 200 yards; is of a bluish tint, speckled with white from the detritus of shells, and sometimes contains indurate slabs. The oysters alone are well preserved-Ostrea divaricata, O. sellæformis--the other shells are bro- ken and mostly comminuted. PectenLyelli ?, a Turritella, and a Dentalium were recognized. 194. At Quitman, this marl is found in wells, and crops out near a sulphur spring (Smith's Spring) S. of town-scarcely distinguishable from that on Suanlovey. Ostrea divaricata, Pecten Lyelli, and Corbula gibbosa, LEA, are the only fossils which I have been able to recognize distinctly. The same marl occurs in the branches in the neighborhood of Quitman, and also, according to reliable information, on the waters of the Buckatunna in S. E. Clarke. On the banks of the Chickasawhay, W. of Quitman, we find a section exhib- iting, beneath the surface materials, a stratum about one foot thick, of gray. very fat and tenacious, laminated clay, and beneath this, to the waters edge, a bluish-gray, non-effervescent, and non-fossiliferous clayey sand, with yellow dots, which wash out readily, so as to produce a cellular surface.-If the marl 1195, 196, 197] QUITMAN-FALLING CREEK. 127 at Smith's Spring immediately overlies the gray laminated clay of this section, the difference of level would give it about 10 to 12 feet thickness. 195. S. of Quitman, we find the same marl cropping out on a branch 2 miles from town. Then, at the crossing of Falling Creek, 4% ms. in the same direc- tion, we obtain the following section: (Sec. 25.) SECTION ON FALLING CREEK, S. OF QUITMAN, CLARKE CO. ofan af f - FEET. INCHES 4- CHARACTER OF STRATA. 6 Gray calcareous sandstone. Blue marl, with Ostrea diviaricata, O. sellae- formis, and another large, round oyster, undet. NO. 4 CO 3 2 Yellowish-gray calcareous sandstone (indurate 2 marl). t t t t White sandy marl, almost void of fossils. 1 The oysters mentioned in No. 3 of this section, are the only fossils seen here— occurring more or less, in all the materials exhibited. I have not observed any outcrops S. of this, although the appearance of the Poplar (Liriodendron), Wild Plum, and Crab Apple in the gullies, still indicates the presence of the calcareous strata. 196. Beds intervening between the Claiborne and Jackson Groups.—Where the Quitman and Winchester road crosses Coonupy Creek, on S. 5, T. 1, R. 16 E., the blue marl of the Claiborne strata does not appear in the bluffs, but a siena- brown clay, stratified in layers 1 to 8 inches in thickness, with sand intervening. It is well exhibited at the point mentioned, in a mill race, and I was informed that in digging it, a great abundance of fine impressions of leaves were found- chiefly dicotyledonous, it appears, but among them also a palm (Sabal?) leaf. I was also informed, that on the banks of the Chickasawhay, due W. of the place, the same clay is found underlaid by marl-containing numerous indurate ledges, and large round oysters-the same, no doubt, as those occurring at Falling Creek.-Immediately S. of this locality, on the verge of the bottom of Coonupy Creek, we find prairie hilltops, and on the hillsides, outcrops of white marl con- taining fossils of the Jackson Group, underlaid by brownish clayey sand. According to level, the thickness of this lignitic, leaf-bearing stratum cannot greatly exceed 30 feet. ས 197. At Garlandsville, Jasper county, on S. 8, T. 4, R. 11 E., we find on Suanlovey Creek, an outcrop of lignite of good quality, of which about 2 feet are exhibited above the bed of the stream; it is overlaid by about 2 feet of a lignitic clay, or earthy lignite. Higher up on the hills just S. of the outcrop mentioned (at Dr. Loughridge's), we find the bald prairie with Zeuglodon bones, oysters, and other fossils of the Jackson Group. I have had no means of ascer- taining its thickness at this point. Near Jackson, on Moody's branch, we find beneath the shell-bearing sand, first blue sandy clay with ferruginous concretions, and beneath, earthy lignite under- : 128 [T198, 199, 200 GEOLOGICAL REPORT. laid by gray laminated clays and sands (¶204). The great thickness of this lignitic stratum, as ascertained in the well bored at the Penitentiary, has already been referred to (187). In the town of Jackson it is commonly struck in dug wells, and various kinds of leaves, as well as acorns, have been found in them. It is evident that the stratum thins out to the eastward, and at Claiborne, and Bettis' Hill, Alabama, according to Lyell (Sill. Am. J., Vol. IV, 2d s., p. 189) and Tuomey, it is entirely wanting, the Claiborne strata being immediately overlaid by the Zeuglodon or Jackson bed, and this by the Orbitoides Limestone, of the Vicksburg Group. · III. THE JACKSON GROUP. 198. The territory of this group, although to a considerable extent occupied, like the rest, by Orange Sand ridges, is strongly characterized in many regions by the occurrence of the black prairie soil on its surface, and also, of bald prairies--both very similar to those of the Rotten Limestone region, though of much less extent. It shares this character to an inconsiderable extent only, with the strata of the Vicksburg Group. The material to which this prairie soil owes its origin, posse ses considerable ana- logy to the Rotten Limestone itself--at times, it is a soft yellowish limestone or indurate marl, containing a good deal of clay; at others, it is in reality, nothing more than a soft, gray or yellowish, calcareous clay. The rock and clay mentioned are ordinarily the matrix of the huge Zeuglodon bones, which are therefore to be sought chiefly in the prairies, and have not, to my knowledge, as yet been found at any great distance from them, in Mississippi.-- These bones, an oyster somewhat resembling Gryphaea convexa of the Cretaceous, the vertebrae and teeth of fish, and a branching coral (Eschara sp.) are the common fossils of the tertiary prairies of S. Mississippi. Other bivalves and univalves, as also echinoderms, may sometimes be found in a tolerably well preserved condition, in the more sandy varieties of this material; but as a general thing, imperfect casts only of these occur in the prairie rock, and usually it requires considerable care to detect their presence at all: 199. About 70 feet of rocks of this character form the upper division of the Jackson stage. The lower portion is formed by from 10 to 20 feet of sandy strata, commonly of a bluish tint, and containing greensand grains. It is this lower bed, cropping out on the banks of Pearl River, at Jackson, which has furnished the fossils described by Conrad, and figured in Prof. Wailes' Report; and whose state of preservation approaches very closely to that of the well-known Claiborne fossils, in Alabama. I have not thus far found any vestiges of the Zeuglodon in this lower division, but I have identified most of its characteristic fossils in the upper strata, at various times and localities. • 200. Whilst the stratigrap ical relations of this group to that next above it (the Vicksburg Group) may be traced with considerabl regularity of (southward) dip, along the channels of the two rivers which cross both belts (the Chickasawhay, and Pearl River), there appears to be some irregularity in the form of the strun on its northern portion. According to the levelings of the N O., J. and G. N. R. R., the city of Jackson is situated 45 feet higher than Canton, Malison county, which is d stant 25 miles due N. from the former place; by the levelings of the Gulf and Ship Island Railroad Survey, however, the difference is only 25 feet At Canton, we find the highest strata, apparently, of the Jackson Group--the gray calcareous clay matrix of the Zeuglodon, occupying the surface, 7201, 202, 203] LOCALITIES OF JACKSON GROUP. 129 though at a moderate depth (20 to 30 feet) the lignito-gypseous material is struck, yielding undrinkable water. The same strata are seen all the way between Canton and Jackson, and crop out very characteristically half a mile N. of the State House. Yet we find lignitic strata cropping out on Moody's branch, a mile N. E. of the State House, and that at a hypsometrical level obviously higher, than that at which, a mile below, we find the beds of blue fossiliferous sand cropping out on Pearl River and in the bed of Dry Creek. Making due allowance for the undulations of the surface at both stations (Canton and Jackson), the surface of the lignitic strata, so far from exhibiting a southward dip, is still slightly higher at Jackson than at Canton. It seems difficult to account for this condition of things unless by supposing a local upheaval of the underlying formation to have taken place before the deposition of the lowest of the Jackson stage. I am not aware whether or not similar irregularities exist in other meridians; it is certainly not the case on that of the Chickasawhay River, where the same strata sink regularly below the water level, as we advance southward. 201. Localities of the Jackson Group.—I am not personally acquainted with the extreme western portion of the formation, in Yazoo and S. W. Madison. According to L. Harper, the marine eocene strata first appear a short distance S. of Satartia, Yazoo county, where the material is of a clayey character, and contains, among other fossils mentioned by him, Venericardia planicosta and Gastridium vetustum (“Eburna”)-sufficient to distinguish it from the Vicksburg marls, further S. I have also been informed, that bones of the Zeuglodon have been repeatedly found in the neighborhood of Satartia; and vertebræ of the same have been kindly forwarded to the collection of the Geological Survey, by W. S McKee, Esq., residing near Satartia, Yazoo county. Harper further mentions the occurrence of compact limestone containing Venericardia planicosta, on the bluff near the Warren county line, and of a bed of marl (fossils not mentioned) on S. 1, T. 18, R. 5 E., Warren (Yazoo ?) county; I have seen no specimens of these materials. 202. About 3 miles N. of Canton, the most northerly indications of a calca- reous formation are met with, in the shape of soft white concretions of carbonate of lime, appearing in a rather stiff yellow loam, at the bottom of gullies. These indications increase as we advance southward, and in some small R. R. cuts N. of Canton, we find profiles in which the common yellow surface loam is under- laid, at the depth of about 3 feet, by a heavier loam containing calcareous concretions, of about the same thickness. This in its turn, is underlaid by a stiff, bluish white clay of massy cleavage ("joint clay"), with white, calcareous concretions and veins, but containing no fossils. There are not, between these several materials, distinct stratification lines; there is rather a gradual transition from one to the other, the upper being probably derived, in the main, from the blue clay below, but changed by oxidation, the admixture of sand and the partial removal by lixiviation of the lime, which has accumulated in the lower portion of the mass. 203. The country between Canton and Calhoun Station, on the N. O., J. & G. N. R. R., is so level as to afford little opportunity of examining the formation. The peculiar greenish hue, however, which the yellow surface loam assumes in the deeper washes, sufficiently indicates the proximity to the surface, of the calcareous clays, which are also struck in cisterns-shallow wells yielding either undrinkable water or none at all. S. of Calhoun Station, the strata of the calcareous tertiary are well exposed; affording the following section in the "Montgomery cut:" R-9 } 130 [T204 GEOLOGICAL REPORT. (Sec. 26.) SECTION IN A R. R. CUT NEAR CALHOUN STATION. FEET. CHARACTER OF STRATA. 5 Yellow loam, concretions of lime in its lower portions. ON NO. C 15 to 20 † † † 8 to 10 Stiff, greenish yellow, calcareous clay, of massy cleavage, containing calcareous concretions. In its lower portions almost blue, cleaving into large, smooth, irregular fragments. Grayish white clay marl, resembling Rotten Lime- stone, stratified in layers (of massy cleavage within themselves) 2 to 3 inches in thickness. Contains numèr- ous fragments and impressions of shells, mostly indis- tinct, some oysters, and bones of Zeuglodon. N 1 In No. 1, a very large skeleton of Zeuglodon, (remnants of which are still abundant in the pile thrown out of the cut), was found, but unfortunately, its portions were scattered all over the country. Here also, the stratification lines are not very distinct, and the thickness of the Zeuglodon stratum, especially, varies greatly. At Rev. J. R. Lambuth's, about 2 miles E. of the cut, this stratum, struck in a cistern, was found only 18 inches in thickness.-It is chiefly stratum No. 2 of this section, which causes the troublesome caving of the sides of this cut. 204. The banks of Pearl River, and the hills bordering the bottom, do not ex- hibit any outcrops in this region, nor are these very common until within a few miles (N.) of Jackson, where strata closely resembling the matrix of the Zeuglo- don at the cut (Sec. 26), appear in washes on the roadside; containing large numbers of the oyster before mentioned, but only traces of other fossils. The same material is found outcropping near the Lunatic Asylum, about ½ mile N. of the State House. The following general section, deduced from observations at Moody's branch and in the McNutt Hills, 1 to 2 miles N. E. of Jackson, will best illustrate the condition of things in this neighborhood. CO 3 [¶205`· M'NUTT HILLS-JACKSON. (Sec. 27.) 131 SECTION OF JACKSON STRATA, AT MOODY'S BRANCH AND MCNUTT HILLS. FEET. CHARACTER OF STRATA. 30 to 45 Yellowish-white marl, more or less sandy, some- times indurate and forming a soft rock; gives rise to "bald prairies” in the McNutt Hills. Contains bones of Zeuglodon, vertebrae and teeth of fish, Echinus!; Scutella, Hemiaster?, and casts of univalves and bivalves of the Jackson Group. tt t † † † 6 to † † † 10 Yellowish white, clayey marl, with few fossils- Pecten nuperus, Pinna, Ostrea. 6 8 Coarse yellow sand, somewhat clayey, with "Jack- son fossils" in a fine state of preservation. 51 4 • 2 Blue sand, with Jackson fossils, mostly detritus. Blue sandy clay, fetid, somewhat micaceous; its 10 upper portion filled with oddly shaped, ferrugino- siliceous concretions. No fossils. 1| Earthy Lignite. 10 Gray laminated clay, interstratified with sand, with traces of stems and leaves. 3 2 No. 6 of this section may correspond to the gray calcareous clay seen N. of Jackson. It seems, however, that in No. 7 also, sandy and clayey materials. alternate more or less. 205. On Pearl River, just above and at the bridge, strata No. 4 and 5 appear in the bed of the river, the whole being, apparently, of a bluish tint, and its fossils. well preserved. The bluff at the bridge, and the hillsides below the State House, exhibit the yellow surface loam, adn sometimes pebble beds, underlaid by greenish yellow, massy clay or loam, which lower down becomes bluish- white, and in all respects similar to stratum No. 2 of Sec. 26 (Montgomery cut), containing soft calcareous veins and concretions. Beneath these, 15 to 25 feet below the hilltops, we find yellow calcareous sand with numerous corals and imperfect casts of shells, and the same concretions as in the clay above. Beneath this stratum, which is 12 to 18 feet thick, there appears, in the bed of the river, the blue sandy marl with Jackson fossils-strata Nos. 4 and 5 of the preceding section. The same strata, the matrix of the "Jackson shells," also crop out om Dry Creek, S. of Jackson, where, as well as at Moody's Branch, I have obtained fine collections of fossils. They are also seen on the opposite bank of Pearl River, to the left of the road embankment, and in the bed of the river below. Jackson for several miles. NO. 132 T206 GEOLOGICAL REPORT. > 206. The following is a list, prepared by Prof. W. D. Moore, of the fossils found in strata Nos. 4 and 5 at Moody's Branch and Dry Creek. With a few differences in the relative prevalence of species, the character of the fauna at both localities is essentially the same. Four species not found on Dry Creek are represented at Moody's Branch, while 15 species not occurring at the latter place were found on Dry Creek. It will be perceived that 8 of the species mentioned below (marked with an asterisk*), are also found at Vicksburg, thus rendering the between the two faunas less wide and abrupt, than the lists heretofore gap published would make it appear. FOSSILS OF THE LOWER SHELL-BED, AT JACKSON. NOTE.-Fossils common to the Jackson and Vicksburg Stage, are marked with an asterisk*. All the species not otherwise murked have been numed and described by CONRAD. FISH. The teeth of several species of sharks occur in the strata of the Jackson Group; all those mentioned in the catalogue of the Vicksburg fossils (¶220) seem to be represented. Prominent among them, both for frequency and size, are teeth of Carcharodon angustidens, of which specimens 4 in's in length have been found near Jackson. Vencricardia planicostu. * Venericardia rotunda, Les. * Cytherea sobrina *Cytherea imitabilis. *Mactra funerata. Cardium Nicolleti. Astarte parilis. Crassatella flexura. Corbula densata. Corbula bicarinata. Corbula, 2 n. sp. Egeria, 3 n. sp. Tellina, sp. *Psammobia lintea. BIVALVES. Lucina ? Corbis, n. sp. Solen. Panopaea n. sp. (all. to P. oblongata). Nucula, 3 n. sp. Leda multilineatu. Leda, n. sp. *Navicula lima. Navicula asperu. Glossus filosus. Avicula, n. sp. Pinna. Pecten nuperum. Pecten, 2 sp. Teredo Mississippiensis. Psammobia, sp. Lucina, 2 sp. *Dentalium Mississippiense. Capulus Americanus. Trochita trochiformis Trochita, n. sp. Umbrella planulata. *Natica Vicksburgensis. Natica permunda. Natica, n. sp. Pyrula sp., (fenestrated). Strepsidura dumosa. ·Clavelithes humerosus. Clavelithes varicosus. Clavelithes Mississippiensis. Fusus sp. *Turbinella Wilsoni. Caricella polita. Mitra dumosa. Mitra Millingtoni. UNIVALVES. Voluta dumosa. Voluta symmetrica. Rostellaria velata. Rostellaria extentu. Morio Petersoni. Conus tortilis. Marginella 2 n. sp. Cypraea fenestralis. Cypraea pinguis. *Cypraea lintea. *Cypraea sphaeroides. Ancillaria. Gastridium vetustum. Turritella alvertu. Turbo sp. Architectonica acuta. Architectonica bellastriata. Phorus reclusus. ¶207. 208] JACKSON GROUP IN RANKIN-SCOTT—SMITH. Scutella Lyelli ? RADIATA. Clype ister sp., Drs. Heminster sp., Dɛ CORALS. Endopachys alutum, Lox-v. Osteodes irroratus. Flabellum Wailit. Eschera 2 sp. Ceriopora 5 sp. 133 207. Of the geology of N. Hinds, northward of Brownsville, and of the adjoin ng portion of Madison, I have thus far no personal knowledge; Zeuglodon bones have, however, been found in that region; and also in the bank of Pearl River, 5 miles S. of Jackson. The formation of N. Rankin (N. of the Peelahatchie), as well as those of Scott county, still remain to be examined; prairies and Zeuglodon bones, however, which are currently reported as existing in that region, are sufficiently indicative of its character. Outcrops of shell marl are menti ned as occurring on Coffee- bogue Creek, by Prof. Wailes, and near Hillsboro', by L. Harper; the characteris- tic shells are not mentioned.-Since the geological map of the State went to press, I have been informed by J. A. Crooker, Esq, Asst. Engineer on the Southern R. R., that a marl-bed was passed through in a road-cut on S. E. 4 S. 31, T. 6, R. 12 E., Newton county, showing that in that region, the calcareous Tertiary extends further N. than it appears on the map. From the description given, this marl seems to belong to the Jackson Group. Fine specimens of marl, containing disintegrated shells of the Jackson Group, have been found by Rev, E. B. Sims, on his plantation, near Morton, Scott county. On the prairies of S. Scott and N. Smith, the Zeuglodon bones, as well as oysters, are very abundant, and are nowhere more easily freed from the matrix, which is generally a very tenacious, greenish-yellow, or bluish, calcareous clay, of irregular cleavage, containing traces only of shells, except when preserved in flat ferruginous concretions occasionally occurring in the same. Such is the case, for instance, in the outcrops near Mrs. Nichols', S. 15, T. 3, R. 9 E., Smith county, where this clay forms the subsoil; it contains here, not only the carbonate, but also sulphate of lime, in crystals. Zeuglodon bones have been plowed up, and washed out in gullies, repeatedly. The bones here are very little changed by petrification, and very light as compared with those found in Clarke county, so that complete skeletons could, when found, be extricated and transported with less trouble than in any other locality I have seen. Very nearly the same condition of things obtains further N., in the prairies near, and southward of, Homewood, Scott county. 208. Of the Jackson shell-bed I have thus far seen nothing in this region both here and in N. Jasper, the clayey Zeuglodon beds alone seem to crop out, forming very heavy soils, partly black prairie", partly "hog-wallow prairie". The latter soil is seen on all the dividing ridges in N. W. Jasper, while the black prairie soil, with the calcareous strata themselves, appears only on the slopes towards the streams, and in the bottoms of the latter. Thus, in passing from Mrs. Nichols' place (see above) to Garlandsville, we find on the whole route no signs of a calcarcous formation, save in the bottom of the West Tallahala-a black, calcareous prairie soil; and within a short distance of Garlandsville, the prairies on the Suanlovey. Here again we see the yellow, more or less cal- careous, clay subsoil, gradually passing into a messy, bluish clay with calcareous concretions; and underlying this, the grayish-white, more or less clayey matrix of the Zeuglolon bones; he latter, accompanied as usual by a large orster, corals, etc, are abun lant on the S. side of Saanlovey Creek, on the N. half of S. 14, T 4, R. 11 E (Dr Loughridge's land), where it forms bild or "shell prairies", as they are termed here, in contra-distinction to the "Post Oak" or "hog-wallow" prairies. At the foot of the low ridge which bears these prairies, we find the blue, calcareous, non-fossiliferous clay, often mentioned, which 134 [209, 210, 211 GEOLOGICAL REPORT. seems to be in many cases the result of disintegration, rather than a stratum occuping a distinct position in the Tertiary-properly, perhaps, in its present condition, a member of the Orange Sand Group. Lower down, on S. 8, we find black prairie soil in the bottom of the creek. I have not heard of the occur- rence of any calcareous strata N. of Garlandsville. The road from Garlands- ville to Paulding runs on a sandy ridge, on both sides of which belts of black prairie, on which the Zeuglodon is found; extend along the streams. In the "lime country" S. of Paulding, however—(about Claiborne P. O.,( no Zeuglodon bones are reported to have been seen. 209. In Clarke and Wayne, the Jackson Group, although its territory is diminished in width, is well and characteristically developed, and affords good opportunities for observation. E, From the hillside on Coonupy Creek, where it first appears on the Quitman and Winchester road (¶196), we trace the whitish marl of this group south- ward, through outcrops and prairies, to the neighborhood of Dr. Ogburn's, S. 21, T. 1, R. 16 È, Clarke county. Here we find on the bluff of the Chickasawhay River, about 30 feet of calcareous, fossiliferous materials, underlaid by gray and reddish laminated clays-the same, no doubt, as those cropping out on Coopupy Creek The upper portion of the marl stratum resembles greatly stratum No. 6 of the section at Moody's branch, and contains, among other fossils, Morio Petersoni, Le la multilineata, Rostellaria velata, Mactra funerata, Cytherea imitabilis, Turritella alveata. My last visit to this point having happened during high water, I was unable to determine whether Nos. 4 and 5 of the Jackson profile (Sec. 26) are represented here; specimens of the underlying clay, however, were collected by me in 1855.—They are unequivocally present, however, in an outcrop about a mile S. of Dr. Ogburn's, at the bridge across Garland's Creek. 210. There are about 7 feet of the tertiary strata visible above the bed of the stream, which itself flows on a material closely resembling that on Pearl River, ·at Jackson—a blue sandy marl, with numerous shells, and greensand grains. This material extends, unchanged, up to about 5 feet above the bed; then, there overlies a mass consisting of shells and numerous, large grains of green- sand—an analysis of which will be found in another place (292). Both beds contain, in well preserved condition, the shells of the Jackson Group, among which even a superficial search detected twenty-two species of the leading Jackson shells. Between Garland's Creek and Suck Creek, 1 mile S. of the former, we again find prairies, and at the crossing of the latter stream, we find its bed entirely excavated into bluish white marl containing but little sand, and essentially the prevalent fossils of stratum No. 7 of the McNutt Hills (Sec. 27), viz: corals, oysters, Pecten nuperus, Scutella, and vertebræ of fish. 211. At and near Gen. W. B. Trotter's plantation, S. 3, T. 10, R. 7 W., the Jackson strata are finely exhibited. The country between this locality and Suck Creek, is also chiefly of a prairie character, and so is the greater portion of the plantation itself. The black prairie soil is under.aid by a stratum, of variable thickness, of yellow, and lower down, greenish yellow underclay, more or less calcareous, without fossils. Beneath this we find on the hillsides, about ten feet of a soft, whitish, calcareous mass, apparently without fossils; beneath this again, there is a ledge more or less indurate in its different portions, not well exhibited, but about 4 to 7 feet in thickness. In this ledge, which is touched by the plow, Zeuglodon bones and oysters abound, together with teeth of Carcharodon, large vertebrae of fish, and nuclei of bivalves and univalves. Among the latter, found associated with the vertebrae of Zeuglodon, is Cypraea fenestral is !—and Conus tortilis !—also, a very large (4 to 5 inches long) Pyrula, not seen elsewhere A few feet below the level of this stratum, is the top ledge of the profile given by L. Harper (Report, p. 144), occurring in a gully about 18 feet deep, in which 9212, 213] TROTTER'S PLANTATION-RED BLUFF. 135 several ledges, 6 to 12 inches thick, of whitish rock, resembling the Zeuglodon matrix above, alternate with sandy glauconitic marls, similar in general to the lower stratum at Garland's Creek, save in that the fossils are very poorly pre- served. The same strata appear on the banks of the Chickasawhay River, not far hence, containing vertebræ of Zeuglodon, Ostrea, Pecten nuperus, Scutella- generally much broken. 212. On the highest points in the plantation, we observe fragments of a fine- grained ferruginous rock containing a few white fossils, not represented in the Jackson Group. In passing thence towards Red Bluff Station, on the M. & O. P. R., we remain on a level with this hilltop, and at several points, high pre- cipitous bluff's come in close to the river. At a point about a mile from the Stn., a bluff about 70 feet high, coming down in terraces to the waters edge, affords the following profile : (Sec. 28.) SECTION OF TERTIARY NEAR RED BLUFF STATION, WAYNE CO. FEET. CHARACTER OF STRATA. **** * * * * * * * * tt t tt t † † † t + t **** 12 First terrace-surface materials only visible. 4 Greenish, non-effervescent clay. Irregular masses of fine-grained ferruginous rock, 4 imbedded in a brownish or greenish clayey mass; both with well preserved fossils. 3 2 Bluish calcareous clay, with indistinct fossils. It is least calcareous, and most clayey, above; near the 52 | waters edge, approaches in character to the blue marl 52 in Trotter's field. A fragment of a Clypeaster, vertebræ of a shark, Pleurotoma sp. Descending to the water level, we see, several hundred yards above, ledges of whitish limestone dipping under this stratum and disappearing at the waters edge. These ledges contain the same fossils as those seen on the banks of the river near Trotter's plantation; and this is the last characteristic outcrop of the Jackson Group with which I am acquainted; for whether or not the material of stratum No. 1 of the preceding section properly belongs to this group, the fossils thus far found have not enabled me to determine. It still continues to be seen in the river bluffs for some distance, as we advance southward, but it gradually sinks and brings the fossiliferous stratum No. 2 close to the waters edge. 213. Beds intervening between the Jackson and Vicksburg Group.-The fos- siliferous bed No. 2 of the preceding section seems to stand intermediate, by position as well as by its fossils, between these two groups, though on the whole, it seems in its fauna to approach more nearly the Vicksburg, than the Jackson Group; but while it has some fossils in common with each and both of the other groups, it is no less remarkable for the predominance of peculiar species-a trait NO. 136 T214 GEOLOGICAL REPORT. FS } which distinguishes as widely the several stages of the Southwestern Eocene of the United States, as even the primary divisions of the entire Tertiary of the old continent. The perfect state of preservation in which we find the fossils of this Red Bluff Group, the easy accessibility of its strata, and withal the narrow limits to which, thus far, I have found it to be confined-the bluffs of the Chickasawhay from Trotter's plantation (where the ferruginous rock, peculiar to this group, first appears on the hilltops-see T212) to Red Bluff Station, or a little below- impart a special interest to this deposit. At low water, the sloping bed of the Chickasawhay River may in spots be found strewn with perfect shells of this group, washed down from above by the rains out of their easily disintegrated clay matrix. I give below a list (for the compilation of which I am indebted to Prof. W. D. Moore, Univ. of Miss.) of the fossils thus far collected from this stratum, determined so far as they are identical with species described by Conrad and Lea, the rest being determined generically only. The species in common with Vicksburg are marked with an asterisk*, those in common with Jackson, by a diggert. Venericardia planicosta †. Venericardia rotunda, LEA.* Cypricardia. Pecten nuperus. Plagiostoma Ostrea, 2 n.? sp. Pectunculus. Astarte (allied to A. recurva, Lea. Gardium diversum, CON.* Corbula. Leda. Cytherea. Dentalium thalloides, CoN. ? Natica Vicksburgensis, CoN.* Natica sigaretina, Con.* Capulus. Capulus. Pileolus. Trochita trochiformis, CoN. Mitra Mississippiensis, CON ?* Cypraea sphaeroides, CoN. Clavelithes humerosus, CoN ?† Clavelithes. Pyrula 2 n. sp. Busycon spiniger, CON.* Fusus (1) (allied to F. Mississipp. CON.*) Fusus. Turbinella perexilis, CoN.* Turbinella protracta, CoN.* Murex, 3 sp. Triton. Rostellaria velata, Con.† Buccinum Mississipp. Cox.*? Buccinum. Cassis. Cassidaria lintea, Con.* Fulgoraria Mississipp. Con.* Caricella. Conus saurilens, CON. * ? Bulla 2 n. sp. Solarium. Flabellum Wailesii, Con. †? Osteodes, CON. ! (not O. irroratus). Madrepora (allied to M. Mississippi. CON.*, but distinct.} Serpula. Southward of the locality mentioned the green clay (No. 3 of Sec. 28.) appears in greater thickness; it is this, no doubt, from which the heavy soil on top of the terrace, or "hommock" (which closely resembles the "hog-bed" soil of Jasper, and is so termed by the inhabitants) is derived-intervening, here as elsewhere, between the prairies of the Jackson and Vicksburg Group. Crystals of selenite, also, have been obtained from the banks of the river, and from wells, in this neighborhood. 214. Lignitic Beds.-At Vicksburg and at Brandon, lignitic clays and sands underlie the lowest visible strata of the Vicksburg Group. Whether or not similar beds are traceable on Pearl River and Chickasawhay, I have not ascer- tained. At Vicksburg, about 25 to 30 feet of black lignitic clays and sands, and lower down, of lignite, underlie the calcareous marine strata. The lignite was supposed to extend to a considerable depth, but according to an observation made by Prof. W. D. Moore, at extreme low water, its thickness does not exceed 3 feet, it being underlaid by a soft whitish limestone, of which he obtained a small 1215] LOWER LIGNITIC AT VICKSBURG NORTH RANKIN. 137 specimen at the waters edge. It resembles the indurate marl of the McNutt Hills; the only fossil which is distinguishable on the specimen obtained (now in the cabinet of Oakland College) is a cast of Cardium, not sufficiently distinct to allow of observing the differences distinguishing the Cardium diversum of Vicksburg age from C. Nicolleti of Jackson and Claiborne. 215. The position of the Brandon bed is given in Sec. 30 (T218; stratum No. 1). Its relation to the Jackson beds cannot, however, be observed there. N. of Brandon, at Mr. John Parker's place, S. 19, T. 6, R. 4 E., there is an alternation of calcareous and gypseous strata, represented in the following profile obtained in a well by that gentleman : (Sec. 29.) SECTION OF TERTIARY IN MR. JOHN PARKER'S WELL, RANKIN COUNTY. *** * **** * * * * **** 8 FEET. CHARACTER OF STRATA. Yellow, massy ("joint") clay, in its lower portions with white calcareous concretions. 4 to Gray massy clay, with smooth cleavage planes, and rosettes and lenticular masses of Selenite. 3 6 с 2 White calcareous stratum, with numerous concretions. 4 () 26 Gray massy clay, with numerous well preserved shells. 2 † † t † † † † † † 40 t t t tt t Blue marl, less clayey than the above, and with shells partially disintegrated. Unfortunately, I was unable to obtain specimens of the shells contained in strata Nos. 1 and 2; there can be little doubt, however, that they are of the Jackson age. The gray gypseous clay No. 3 crops out near the mouth of a creek into the Peelahatchie, S. 7, T. 6, R. 4 E.; it there contains both selenite and small masses of lignite. It seems to be this clay chiefly, from which the soil of the "gypseous prairies" of N. Rankin and Hinds is derived, while the calcareous strata (No. 4, and part of 5) form small prairies or "prairie hilltops" on the intervening hills. Strata 3, 4 and 5 occur at Clinton, and in a R. R. cut S. of Jackson; specimens of selenite occurring in gray clay, have been collected by Prof. Wailes, 7 miles N. W. of Jackson, and are mentioned as occurring abundantly at Ball Prairie, 6 miles W. of Jackson. NO. 10 5 138 [¶216, 217, 218 GEOLOGICAL REPORT. 216. I have also obtained crystals of selenite from Scott county, where, from all accounts, the gypseous prairies are well developed. In Smith county also, N. of Raleigh, at L. E. Crook's place on the Okahay, there is a body of gypseous and black prairie intermingled, precisely as we find it at John Parker's. It might appear at first sight that these gypseous strata could be referred to the Grand Gulf Group, and such was my first impression. But it is difficult to reconcile this supposition with their geographical and hypsometrical distribution, besides which, their lithological character is entirely different from the blue or brown laminated clays of the lignito-gypseous strata which unequivocally overlie the Vicksburg strata, and form "salty spots" in the soil, but nowhere so far as I have seen, anything resembling the gypseous prairie. On the other hand the clay found in the outcrop on the Peelahatchie is undistinguishable from specimens of the calcareo-gypseous matrix of the Zeuglodon in Mrs. Nichols' field. In Wayne county, too, on the Chickasawhay, heavy, greenish or bluish clays intervene between the Jackson and Vicksburg strata, and everywhere we find intervening between the black prairie territory of the two groups, either the gypseous, or "hogbed prairie" soils. The absence, thus far, of deep wells or borings on the territory occupied by the Vicksburg Group and by these doubtful clays, has prevented me from obtaining satisfactory evidence on this question. If, as I suppose, the material of the gypseous prairies is derived from an irregular stratum intervening between the Jackson and Vicksburg Group, it is nevertheless true that in some localities the soils derived from the strata overlying the latter, approach very closely, both in space and quality, to those derived from the lower stratum in question. IV. THE VICKSBURG GROUP. 217. This interesting group, the highest of the marine eocene formation of Mississippi, and the only one which reaches the banks of the Mississippi River (at Vicksburg, where it was first studied by Conrad) occupies a narrow belt of nearly uniform width, south- ward of the territory of the Jackson Group, extending accross the whole of the State, to the Alabama line, and thence to the Tombigbee River, where it forms the well-known bluff at St. Stephens. It is the only one of the marine stages of the eocene, which exhibits crystalline limestones; associated, however, with blue and white marls more or less indurate at times, as is the case with the other groups. The marls, which have a tendency to be sandy rather than clayey, are the prevalent materials of the formation, and the chief repositories of the beautiful fossils of the group; they usually alternate with ledges of blue (or by oxidation yellowish) limestone, more or less sandy and glauconitic, and not unfrequently. contain within their mass, indurate, rounded nodules, often very rich in fossils. 218. It would be difficult, however, to give a description of these calcareous strata without referring at the same time, to the lignito-gypseous* strata which generally accompany, usually overlie it, and might be considered as strictly belonging to the Grand Gulf Group, but for their being found in one locality at least, overlaid by a string of limestone nodules containing the characteristic fossil of the Vicksburg Group-the Orbitoides Mantelli. Through this, so close a connection is apparently established between the two groups just mentioned, as to afford a strong presumption in favor of the eocene age of the Grand Gulf Group itself. This circumstance, together with the occurrence of tree palms in *i. e., clays or sands containing more or less gypsum and lignitic matters. 1 ¶218] VICKSBURG GROUP. 139 latitudes where none exist at present, is the only clue we have thus far to the age of the latter group. I shall therefore give, first in order, the sections occur- ring near Brandon, Rankin county, in which these relations are illustrated. The outcrops from which this general section is compiled, embrace between them a space of nearly seven miles E. and W. along the line of the Southern R. R., from the junction of the old and new track near Brandon, to Batt's Summit, S. 3, T. 5, R. 3 E. The thickness of the strata, as given in the third column from the left, is the result of actual measurement; the total thickness, as given in the first column, is deduced from the R. R. levelings. ! 140 1219 GEOLOGICAL REPORT. (Sec. 30.) SECTION OF TERTIARY, FROM YOST'S LIME-KILN TO BATT'S SUMMIT, RANKIN COUNTY. FEET CHARACTER OF STRATA. E. Yellow surface loam. 8 A. P. Miller's Field. R. R. cuts near Brandon Depot, | CALCAREOUS (VICKSBURG) STRATA, 70 FT. | (West of) Yost's Lime Kiln. East of) Lignito-GypsEOUS STRATA, 45 FEET. Ray's Summit (Burke's Cut). Batt's Summit (Dent's Cut). NO } 13 12 Greenish yellow clay, with calcareous concretions, and lumps of Orbitoides Limestone. Yellow or deep orange-colored clay, with massy cleavage ;| 7 contains crystals of gypsum. carbonaceous matter. 12 Portions of it black with 11 Cream-colored or white, tallowy mineral, with crystals of gypsum. 10 Yellow and blue clay interstratified; blue lower down, and 8 massy. Contains crystals and flakes of gypsum, efflorescence 9 of salts on the surface. Lignito-gypseous, clay and earthy Lignite, in cut at Brandon. 8 Grayish-blue clays, massy or laminated, with crystals, sheets and rosettes of gypsum, and crusts of Yellow Iron 7 Ore (1224) on cleavage planes. Gray gypseous clays. 6 Yellowish calcareous sands with Ostrea Vicksburgensis, Pecten Poulsoni, and casts; in its upper portion, rounded, 30? dark-colored concretions ("nigger-heads") with well 5 preserved Vicksburg fossils-Arca Mississippiensis, Cardium diversum, etc. White marls, more or less indurate at times, alternating with hard ledges abounding in Pecten Poulsoni and Orbi- toides Mantelli, which impart to the rock a laminated structure. 4 6 10 Ledges of solid blue limestone. Pecten Poulsoni, Orbi- toides, Fulgoraria Miss, Panopaea oblongata. 3 CO White marls, more or less indurate, with hard ledges Pecten Poulsoni, Orbitoides Mantelli, Schizaster. 2 7 Gray and yellowish laminated clays, interstratified with sand; non-effervescent, non-fossiliferous. Lowest visible. 1 219. On the ridges S. of Richland Creek, near Brandon, and on the high dividing ridges between the waters of Pearl and Strong Rivers in S. Rankin generally, as well as in S. Hinds (e. g., between Auburn and Raymond), we find the white friable sandstones of the Grand Gulf Group, underlaid by, and 220] GYPSEOUS PRAIRIES--VICKSBURG BLUFF. 141 alternating with, lignito-gypseous clays entirely similar to those found in the outcrops on the Southern R. R., east of Brandon. Sandstone similar to this, as well as to the Fort Adams' rock (¶236), is found overlying the calcareous Vicksburg strata near Raleigh, Smith county, and thus generally along the southern line of the Vicksburg Group. But nowhere, except at Batt's Summit, have I found the lignito-gypseous strata overlaid by the marine fossiliferous limestone of that group. On the other hand, the former-or rather the gray gypseous clays resulting from their disintegration, sometimes occupy the surface of the territory, forming "prairies" (whose gray soil and exclusive Black Jack and Post Oak growth along their borders, readily distinguish them from the "black prairies" formed by the calcareous materials of the marine formations); and "salty spots" where efflorescences of various salts (chiefly sulphates of lime, magnesia, potash and sometimes iron, and chloride of sodium) appear on the surface, often injuring vegetation greatly. It would seem, however, that in some localities either the lower portions of the Vicksburg, or the upper of the Jackson beds, are interstratified with heavy, gray clays, gypseous or lignito- gypseous, to which the greater portion of the gypseous prairies owe their origin (see (215, ff.) 220. Localities of the Vicksburg Group.--The general features of the Vicksburg bluff, which have already been mentioned, are exhibited in the following section. I regret that want of space precludes me from giving the detailed section, in which no less than 24 distinct strata, recognizable at most points, are exhibited. (Sec. 31.) SECTION OF THE BLUFF AT VICKSBURG, WARREN COUNTY. • FEET. CHARACTER OF STRATA. NO. 10 to Calcareous silt with snails--Bluff Formation. 7 20 10 5 to Bluish and yellowish hardpan, often pebbles-Orange Sand. 6 t + t 20 60 Alternating strata, 1 to 6 feet thick, of limestone and to marl, containg the Vicksburg fossils, and some bands of 65 non-effervescent, gray sand and clay. Black lignitic clay, and gray sand, with Ostrea Corbula alta, Natica Mississippiensis, 5 | gigantea, 4 Cytherea sobrina, Madrepora Miss. 25 Gray or black, lignitic clays or sands, with iron pyrites; exuding salts and sulphuretted hydrogen. 3 3 | | 3 3 Solid, lustrous lignite, with whitish cleavage planes. White limestone, of the Jackson Group ? 2 or 5 *** } 142 [T220 GEOLOGICAL REPORT. Within the bed or series of beds, here marked as No. 5, the thickness of the several ledges varies greatly, so that detailed sections taken at different points of the bluff, exhibit notable variations in this respect. There are, however, several horizons which may be recognized almost everywhere, if the land slides which have taken place at many points, be left out of consideration. Thus, about 25 to 28 feet above bed No. 4 (containing the large oysters), we find a succession of 4 to 5 narrow bands (each 8 to 15 inches thick) of marl and laminated clay. which may be identified at all points, and acquire some importance from the circumstance that immediately beneath them, for the next 10 to 12 feet, the purest and hardest limestone (from whose strata most of the building stones and flagstones used at Vicksburg have been quarried) is found. The specimen of limestone analyzed (¶305) was taken from a point about 5 feet below the clay seams in question; while the marl (278) is derived from the 4 foot stratum immediately overlying the clay bands. Another stratum which, from the abundance and character of its shells, may be recognized easily, lies about 16 feet above the clay bands-a reddish, sandy marl, about 3 feet thick. Its shells are white, well preserved and easily washed out by the rains; among them, Ostrea Vicksburgensis, Arca Mississippiensis, Cardium diversum, Den- talium Miss., and numerous species of Pleurotoma, are conspicuous. Immediate- ly beneath it lies a 3 foot bed of semi-indurate marl with large nodular masses of limestone, which can also be identified at most points; and the whole character of the strata from this bed upwards to the Orange Sand, shows a closc correspondence with No. 6 of the Brandon section (Sec. 30, ¶218). The various clayey strata and bands of the exposure (from which to the marl there are many insensible transitions) give rise to patches of "prairie soil" OF the Vicksburg hills.-At some of the higher points where deep washes have exposed the formation, we find at the base of the Orange Sand or its representa- tives, blue sandy clays greatly resembling some of those of the Grand Gulf Group. FOSSILS OF THE VICKSBURG GROUP. (Mostly occurring at the Vicksburg bluff). Carcharodon angustidens, AG. FISH. Saurocephalus lanciformis, HARL. Carcharodon megalodon, Ac.? (may Otolithes. belong only to the Jackson Group.) Ichtyodorulites, scales and other remain- Galeocerdo latidens, AG. of fish. (WAILES). Teeth of several other species of Squalideae. CRUSTACEA. In the limestone of Vicksburg Marshall' and Stewart's quarries, and Brandon neighborhood, the plates, claws, etc., of a short-tailed crab are quite abundant. MOLLUSCA. [T. A. CONRAD in Journ. Acad. Nat. Sc. of Phila., 2d series, Vol. I: Traus,- Ac. Oct. 1847.] Panopaea oblongata. Pholas triquetra. Amphidesma Mississippiensis. Psammobia papyria. Psammobia lintea. Tellina pectorosa. Tellina serica. BIVALVES. Tellina Vicksburgensis. Donax funerata. Cytherea astartiformis. Cytherea imitabilis. Cytherea semi-punctata. Cytherea Miss. Cytherea sobrina. T220] Cytherea perbrevis. Mactra Miss. Mactra funerata. Crassatella Miss. Cardium eversum. Cardium globosum. Cardium diversum. Cardium Vicksburgense. Corbula intastriata. Corbula engonata. Corbula alta. Corbis staminea. Lucina Miss. Lucina perlevis. Loripes? turgida. Loripes? eburnea. Kellia oblonga. VICKSBURG FOSSILS. Chama Miss. Pectunculus arctatus. Leda serica. Nucula Vicksburgensis. Arca Miss. Navicula lima. Navicula Miss. Navicula protracta. Avicula argentea. Modiola Miss. Pinna argentea, 143 Pinna n. sp., nearly a foot long; Mar- shall's quarry. Lima staminea. Pecten Poulsoni. Pecten calvatus, MORT. Ostrea Vicksburgensis. Ostrea gigantea. UNIVALVES. Dentalium Miss. Fissurella Miss. Trochita trochiformis. Bulla cassiplica. Architectonica trilirata. Phorus humilis. Sigaretus Miss. Natica Miss. Natica Vicksburgensis. Narica Miss. Actaeon Andersoni. Ringicula Miss. Cypraea sphaeroides. Cypraea Tintea. Conus sauridens. Oliva Miss. Cancellaria Miss. Cancellaria funerata. Scalaria trigintanaria. Turritella Miss. Terebra divisurum. Terebra tantula. Buccinum Miss. Cassidaria lintea. Cassis caelatura. Cassis Miss. Oniscia harpula. Fulgoraria Miss. Mitra conquisita. Mitra Miss. Mitra cellulifera. Chenopus liratus. Mitra staminea. Mitra Vicksburgensis. Caricella dlemissa. Turbinella Wilsoni. Turbinella protracta. Turbinella perexilis. Scobinella caelata. Triton crassidens. Triton abbreviatus. Triton subalveatus Triton Miss. Murex Miss. Melongena crassicornuta. Typhis curvirostris. Busycon spiniger. Fulgur nodulatum. Clavella Vicksburgensis. Fusus Miss. Husus Vicksburgensis. Ficus Miss. Pleurotoma porcellana. Pleurotoma Miss. Pleurotoma servata. Pleurotoma congesta. Pleurotoma cristata. Pleurotoma tantula. Pleurotoma tenella. Pleurotoma cochlearis. Pleurotoma eboroides. Pleurotoma abundans. Pleurotoma rotaedens. Pleurotoma decliva. Scutella Lyelli. Mortoni a Rogersi ? ; RADIATA. Schizaster, n. sp. Salenia? n. sp. 144 [T221, 222, 223 GEOLOGICAL REPORT. CORALS. Madrepora Miss., Con. Madrepora Vicksburgensis, Cox. Turbinolia caulifera, CON Lunulites Vicksburgensis, Con. Lunulites sp. Orbitoides Mantelli. 221. Further than at Vicksburg itself, I have not as yet examined the forma- tions of Warren county, and can state only what I have heard.-N. E. of Vicksburg, on the Yazoo bluff, as well as in ravines (which are deeply cut into the Bluff formation), the Vicksburg strata frequently appear up to Haynes' Bluff on the Yazoo, according to Prof. Wailes. I am not aware, however, that they appear anywhere S. of Vicksburg, nor on the line of the Southern R. R., west of Big Black River. Outcrops exist on the latter stream, above the rail- road crossing, in Hinds county; of these, however, I have no personal knowledge. A specimen of very sandy, greenish marl, containing Vicksburg fossils, was collected by Prof. Wailes near Amsterdam, on the Big Black. At Brownsville, the Vicksburg strata crop out in the town, where a spring issues from beneath a ledge of blue limestone containing Arca Mississippiensis, Orbitoides, Pecten Poulsoni, and others; it is overlaid by calcareous glauconitic sand with Pecten Poulsoni, Ostrea Vicksburgensis, and casts, the whole obvious- ly corresponding to adjacent portions of beds Nos. 5 and 6 of the Brandon profile. 222. The blue limestone crops out on Baker's Creek a few miles below Bolton's Depot; at Steward's quarry, 3 miles W. of Clinton, where specimens of Panopaca oblongata, Clypeaster, and Serpula, were procured by Prof. Wailes; also a specimen of sandy marl containing Arca Mississippiensis and Conus sauridens. It is found moreover at Marshall's quarry near Mississippi Springs, where impressions of Crassatella Mississippiensis, Cardium diversum, Panopaca oblongata, Pinna argentea, Turritella Mississippiensis, a large Phorus, and Schizaster, as well as a small lenticular mass of fossil resin were collected by the same. Two specimens of a very large Pinna, not seen elsewhere, have been found by Mr. Marshall. It is also found about nine miles S. of Jackson, on Pearl River; and about 3 miles S. of Byram Station, near the R. R., where it occurs in disjointed, cavern- ous blocks rather than in a solid stratum. 223. The banks of Pearl River at and above Byram Station, as well as the bed of the creek close by, exhibit fine outcrops of bluish marls with finely preserved shells, for obtaining which this is a very eligible locality. A section of this outcrop, and an analysis of one of the marls occurring there, will be found further on (¶280). About half a mile further up, instead of the uniform strata of marl seen in the bluff at Byram, we obtain the following section-corresponding, no doubt, to strata somewhat lower than those at Byram. 1224, 2251 VICKSBURG GROUP AT BYRAM-BRANDON. (Sec. 32.) 145 SECTION OF VICKSBURG STRATA, ABOVE BYRAM STATION, RANKIN COUNTY. FEET CHARACTER OF STRATA. 1 Gray calcareous sandstone, very hard. 1 † † † 2% Blue marl with shells, and small grains of glauconite. 2 to 3 Gray, or variegated blue and yellow, sandy lime- stone, with numerous shells, of slaty cleavage. Sandy marl with shells and large grains of glauconite. NO 6 t 2% to 3 Clayey marl, bluish, with fewer shells than upper layer 2 Gray or variegated, sandy limestone. I LAD 5 3 ลง Blue marl--waters edge. Shells of the Vicksburg Group, but more especially Orbitoides Mantelli and Pecten Poulsoni, occur in all these strata. 224. At Mr. German Berry's, S. 11, T. 4, R. 2 E., (Monterey P. O.), Rankin county, we find a blue, sandy glauconitic marl containing Orbitoides, Area. Mississippiensis, Pecten Poulsoni, Cytherea imitabilis, etc., cropping out on the banks of Richland Creek. It is overlaid by brown, laminated, gypseous clays, which form the main body of the hills. The chief outcrops near Brandon have already been noticed in the general profile, so that a few generalities only require to be added. The town of Bran- don itself is situated on a high ridge composed partly of Orange Sand, partly of the lignitic strata, which are struck in wells in the S. part of the town, furnishing water strongly impregnated with sulphuretted hydrogen, gypsum, and, usually, magnesian salts; in some instances, sulphate of alumina. Crystals, rosettes and laminæ of gypsum, are very abundant in the lignitic strata of the Brandon neighborhood; in connection with the gypsum, either incrusting it, or intimately mixed with crystals of the same, there occurs a mineral of a sulphur-yellow color, apparently amorphous, but minutely crystalline under the microscope, which consists essentially of hydrated persulphate of iron and sulphate of potash; probably the Misy, or Yellow Iron Ore. The same occurs at Shongalo (183). In Mr. Ware's well, S. of town, at a depth of 38 feet, Orbitoides limestone was struck, after passing through the lignito-gypseous strata; and it appears on three sides at the foot of the ridge. Thus, due S. of the town, on S. 34, T. 5, R. 3 E., on Richland Creek; near Dr. Parker's, S. 27, where it appears in ledges 2 to 3 feet thick, but not, apparently, continuous for any great distance. The character of the outcrops in A. P. Miller's field, N. W. o Brandon-SS. 17 and 20, T. 5, R. 3 E., has been given in the general section (218); the strata comprehended in No. 2 form hills or low ridges, with a general bearing E. N. E. to W. S. W., and which, according to elevation, are capped with the limestone strata Nos. 3 and 4. An analysis of the rock from No. 3, taken at Yost's lime- kiln, is given below. 225. Similar hills capped with limestone or whitish marl appear, further on in a N. E. direction, at Mr. Jos. Jayne's plantation, and at Rev. D. A. Campbell's płace, S. 2, T. 5, R. 3 E. At the latter locality we find, included between twe B-10 145 (¶226, 227, 228, 229 GEOLOGICAL REPORT. Jedges of limestone (the uppermost of which is rather cavernous), a lenticular mas of calcareous spar, 18 inches to 2 feet in th ckness, possessing a drusy surface, and composed of miny layers which, when struck, cleave into acicular prisms of irregular form, disposed as usual at right angles to the surfaces or nuelsion which the layers have been formed. A few stalactites which we find imbedded in the upper surface show this mass to have been formed in what was originally a small cave, by means of calcareous solutions infiltrated from above. -Beyond the usul os-ils, a Soutella?-is very common here; it is always converted into brown calcareous spar. 226. At Dr. I. M. Quin's, 4 miles S. E. of Brandon, we find limestone under- hid by whitish mërls, a profile of which, as well as analysis of the latter, will be found below (¶285). I have not explored personally the country on the Brandon and Raleigh road, but according to reliable information, outcrops similar to those at Dr. Qu'n's and a country resembling that N. and E. of Brandon, continue on to Polkville and beyond, where, on the waters of the Okahay, the calcareous as well as the gypseous prairie are well developed ; e g. in the neigh- borhood, and N. of, Mr. L¨ E. Crook's place, S. 14, T. 3, R. 7 E. 227. Due N. of Raleigh, at Mr. Austin's mill, S. 18, T. 3, R. 8 E., we find, in the bed of a creek, blue marl with wel preserved Vicksburg fossils; the material being, however, very changeable, and sometimes containing large indurate lumps. On the ridges E. of Raleigh, in descending to Shongalo Creek, we find at a level considerably above the marl at Austin's mill, outcrops of Orbitoides limestone; on the summits of these ridges, we find the Orange Sand underlaid by white friable sandstone of the Grand Gulf Group, and in wells on the ridge (as at Mr. Craft's) lignito-gypseous strata are struck. Between Shon- galo and Bowland's Creek, on the Garlandsville road, the lignito-gypseous strata, as well as the sandstone, are wanting, while at the level at which these are found on the ridges near Raleigh, the Ort itoides limestone appears-forming ridges with flat backs, on which round knolls of Orange Sand are perched, while on the hillsides, we find prairie soil.-After crossing Bowland's Creek, on the Garlandsville road, no more my strata appear unt we reach the Nichols neighborhood, where the Zeuglodon Lenes are found (1267). } ▼ 228. I have not personally explored the territory of the Vicksburg Group in 8. Jasper; it is described, however, as being entirely similar to that in Smith county, even as, still further S. E., I have found it in Wayne. Observations made by Prof. W. D. Moore, on the Paulding and Williamsburg road, show, fine outcrops of the strata of this group to exist near Judge McCollum's, at a point about 3 miles S. W. of Paulding, where there appear on the hillsides, strata characterized by great numbers of the Schizaster, occurring with Pecten Poulsoni ş and at a lower level, the Vicksburg bed containing Ostrea gigante 1, crops out. As in the territory of the Jackson Group, N. of this, the appearance of outcrops is very much dependent upon accidental vircumstances, since the ridges consist of Orange Sand, and it is only in the deeper channels that the cocene strata are exposed at all. 229. In Wayne county, W. of the Chickasawhay River, in T. 9, R. 7 W., the ridges are also to a great extent composed of Orange Sand; yet we frequently find strata of sandy marls with Orbitoides and Pecten Poulsoni, cropping out on the hillsides, and sometimes on the hilltops also. On the Chickasawhay, between Rel Bluff and the latitude of Waynesboro', both marls and limestones crop out with frequency; the same is the case on the creeks on the E. side, as on Cakchey's Mill-creek, and Limestone Creek especially near the mouth of the latter, at the foot of the hill on which Dr. E. A. Miller lives-the most southerly outcrop of the calcareous Eocene on the Chickasawhay. The sections exhibited here in the river banks and cuts of the R. R, correspond so closely to those between Yost's Lime-kiln and Brandon Depot (1218), that the specimens can hardly be distinguished from each other when placed side by side; the only difference being the great abundance of 4230, 231] WAYNE COUNTY.-GRAND GULF GROUP. 147 Orbitoides in the soft white-marl intervening between the strata of rock. The ledges of hard limestone (Nos. 3 and 4, Sec. 33) are not so wel defined-the rock being softer and whitish; as it appears on the hillside, where the plow touches it. The sandy strata (No. 6) are the same in every respect. Near the top of the hill, Dr. Miller found in his well a stratum of blue shell mail 3 or 4 feet in thickness, underlaid by a stratum 3 or 4 feet thick, of green laminated clay.--The aggregate thickness of the calcareous Vicksburg strata, as observed here, also corresponds very nearly to that deduced at Brandon from the R. R. levelings. According to information given me by Dr. Miller, the same strata appear on the Buckatunna, E. and S. E. of his place. Between the two streams, there extends a belt of calcareous prairie-or rather, a succession of prairie spots on the ridges, where the limestone frequently crops out--characterized always by Orbitoides and Peten Poulsoni, and not unfrequently, by a very large Salenia? --Between this prairie belt and those extending eastward from Trotter's Plan- tation and Ogburn's (¶209), there intervenes a belt of “hogbed soil”—-formed perhaps, from the clayey strata interposed between the Jackson and Vicksburg Groups. V. THE GRAND GULF GROUP. 230. Notwithstanding the large extent of territory represented on the map as occupied by this formation, it is of less importance to the district of its occurrence, than most of the formations here- tofore mentioned, are to theirs. Not only is it comparatively poor in useful materials, but on the whole, it takes but a limited and unimportant part in the surface conformation of the region, which is chiefly due to the deposits of the Orange Sand age. Its greatest development takes place on the waters of Pearl River, and on the tributaries of the Mississippi; while on the waters of Leaf, Chick- asawhay, and Pascagoula Rivers, it often requires a diligent search to detect it at all under the heavy covering of the Orange Sand. 231. Its materials are, cssentially, clays and sandstones, the latter generally rather aluminous and soft, and of white, gray and yellowish-gray tints: the sand being very sharp.. Beds of loose Fand are unusual; but the clays are oftentimes quite meagre, though the sand contained in them (as is the case in the sandstones) is a-nally quite fine. Beds of pure, highly tenacious clay are quite abundant, however, and there is on the whole, little tendency to lamination; so that, while in the Northern Lignitic formation, massy clays are the exception, they are the rule in the Grand Gult stage. It is owing to this circumstance, no doubt, that the fossil remains of plants, which are far less common in this than in the lower stages of the Lignitic, are so rarely well preserved. The colors of these clays, also, are generally much lighter than those we see in the Northern Lignitic, being rarely other than gray, grayish white, blue and green-the latter colors often reaching ✩ high degree of intensity; though on their surface, they often appear yellow from oxidation. ❤ N. W. of a line drawn from Fort Adams, Wilkinson county, to Raleigh, Smith county, sandstones are quite abundant in this formation-rather the prevalent material. S E. of that line, however, I know of none, the several kinds of clay forming the exclusive material. So far as I know, the whole formation from Grand Gulf and Raymond to Dwyer's Ferry on the Pascagoula River, is clauacterized by the presence, more 148 [¶232, 233 GEOLOGICAL REPORT: 3 or less, of gypsum und common salt, and generally also of magnesian salts. This is the case even with many of the solid sandstones, which on exposure to the weather become covered with efflorescences of salts; and it is to this peculiarity, no doubt, that their want of durability is to a great extent to be attributed. Moreover, these sandstones frequently contain small concretions of iron pyrites, which vitriolesce when the rock is exposed, and thus rend even large blocks. The carbonate of lime is a rare ingredient, and the deposits containing it are always quite limited. Even in these, I have never detected even a trace of marine fossils.. 232. Localities of the Grand Gulf Group-No outcrop, perhaps, is more characteristic, and represents within a small space so many peculiarities of the formation, as that from which it has taken its name-that torming the Bluff at Grand Gulf, on the Mississippi River, where it is overlaid by the calcareous silt of the Bluff formation. The following is a detailed section obtained by myself, on the spot: # (Sec. 33.) SECTION OF THE BLUFF AT GRAND GULF, CLAIBORNE COUNTY. C 111 FEET | CHARACTER OF STRATA. NO 60 • to 70 Calcareous silt of the Bluff formation, forming the billtops. 12 14 15 "Grand Gulf Sandstone," in ledges 10 inches to 2 feet in thickness; stratification often discordaut 11 and curved. Gray sandy material, sometimes soft sandstone, with an argillaceous cement; alternating with harder ledges, 6 to 10 inches thick, of friable, whitish sandstone 2% Solid whitish sandstone, of good quality. | 2½ |Greenish-gray clay, with white veins of carb. of lime. | Soft white sandstone. | 10: 8 7 1 ½ Grayish-yellow pipeclay. 1 | Dark gray, brittle sandstone. LO 5 d 3 | Gray, semi-indurate, clayey sand. 4 17 Gray and yellowish sands and clays, semi-indurate, interstratified. 3 3 | Semi-indurate, gray sand. 2 | Greenish gray clay, with veins of carbonate of lime. 1 233. The character of the minor ledges of this section is very changeable, so that, fifty yards from the precise point where these data were taken, the aspect of the lower portion of the profile especially, may vary greatly. It is only the upper ledge (No. 11) which possesses the peculiar structure which characterizes the "Grand Gulf Sandstone" proper, viz: Grains of pellucid quartz, constituting rather a coarse sand, imbedded in an opaque, white, enamel-like mass of silex, 1 : 234, 25¹, 2352, 236] GRAND GULE SANDSTONE. 149 It is not of common occur- which forms quite half of the bulk of the rock. rence, except near the latitude of Grand Gulf. It appears in a ledge about 15 inches thick, on hillsides at a branch about 2 miles S. W. of Port Gibson, under!aid by massy blue clay; an outcrop N. of Port Gibson, on Mr. J. C. Humphreys' land, does not exhibit the peculiar structure of the "Grand Gulf rock." At Rocky Spring, in a profile of 30 feet, we find only 2 or 3 feet of the peculiar rock, and then rather in lenticular masses than in continuous strata, the rest being soft sandstones, clays, etc., which form the usual material of the numerous outcrops in Claiborne and S. Flinds; and to describe which would be endless repetition, the only rule being, that near to the edge of the calcareous (Vicksburg) strata, the materials generally resemble more nearly those of the lignito-gypseous formation near Brandon (¶218 ff.) There are, however, in several localities, strata of considerable thickness, of solid sandstone, hard enough to answer for architectural purposes; thus at the Grindstone Ford, where the Raymond and Port Gibson road crosses the Bayou Pierre, a solid stratum at least 15 feet in thickness, crops out on the bluff, and similar ledges occur near the Mississippi Springs; the rock being, however, ordinary siliceous sandstone. Between Terry and Crystal Springs, ledges of white sandstone are exhibited in several cuts-generally soft, and alternating with materials still softer; the true "Grand Gulf rock" is found there also, however. It is said to be very abundant in the heads of the Bayou Pierre in Copiah county generally. 234 Silicified wood is very abundant in S, Hinds and E. Claiborne, as well as in Copiah; trunks of trees with roots still visible, are said to occur S. of Rocky Spring. It is in this region, on the Bayou Pierre, that silicified palm wood is often found; numerous specimens of it have been picked up near Rocky Spring. It also occurs, however, in Hinds county; a very fine specimen, found near Spring Ridge P. O., his lately been presented by Dr. W. Thompson; and in Mrs. Oakley's collection, at Jackson, there are specimens found by Governor Matthews in the bank of Pearl River, close to the town. + Beds of lignite appear to occur in several localities, near Big Black River, W. and N. W. of Rocky Spring. One 2 feet thick is mentioned by Prof. Wailes, as being inclosed between two ledges of sandstone, and impressions of aquatic plants are mentioned as occurring in it. Another is said to have been struck in a well on S. 11, T. 4, R. 3 W., Hinds county, at thirty-five feet; and another still is mentioned as existing on Pearl River at Partin's Ferry, Hinds county. 2351 In Jefferson county the materials of the formation appear to be generally soft (or at least brittle) sandstones, and clays. The strata underlying the town of Fayette, which crop out a short distance from the place, on the Port Gibson road, seem to correspond to strata No's 3, 4 & 5 of the Grand Gulf profile; the fine grained, dark gray, brittle sandstone, on the exposed surfaces of which efflorescences of salts occasionally appear, is sometimes quite cellular; wells dug in this formation yield fetid, undrinkable water. In the ridges S. of Fayette, towards Hamburg, we find chiefly gray clays, which sometimes appear even on the summits of the ridges, but usually crop out on the hillsides and in gullies. In several spots they contain veins and concretions of carbonate of lime, but no fossils. 2352´ In Franklin county, near Hamburg, we find only blue clays in the beds of the streams, but urther S. & S. W., on the Homochitto and Wells' Creek, sandstone is found in abundance-associated, however, with clayey strata, to the mud formed by the disintegration of which, the ridge between the Homo- chitto and Wells' Creek owes its sonorous name of "Devils Backbone." In some localities in this region, ledges of considerable thickness and uniformity occur; the rock from Dixon's Quarry, S. 40, T. 6, R. 2 E., which is of fine quality, is scarcely to be distinguished from that of Grindstone Ford, mentioned above; it is almost perfectly white. 236. According to Prof. Wailes, the ledges forming the Devils Backbone are traceable in S. W. course, with little interruption, to Loftus' Heights, near Fort 150 [237 GEOLOGICAL REPORT. · • Adams, on the Mississippi River, where for several miles down the river, out- crops of soft sandy materials interstratified with ledges of rough variegated sin Istone, are to be seen; but here, as elsewhere, notwithstanding the good opportunity afforded for examination, I have been unable to detect even a trace of fossils.-The Block-house Hill, at Fort Adams, allords the following section : (Sec. 34.) SECTION AT LOFTUS HEIGHTS, FORT ADAMS, WILKINSON CO. | FENT CHARACTER OF STRATA. 73 Yellowish-gray calcareous silt of Bluff Formation. I. NO | 170 87 | Orange Sand.—Yellow, orange and white sands. Argillaceous sandstone, yellowish-gray in its mass, variegated with ferruginous spots and veins, and of different degrees of hardness, so as to weather into rough, jaggeð surfaces. Traceable to waters edge. · The sandstone of stratum No. 1, besides being of unequal hardness within its mass, is interstratified. at from 6 to 15 feet, with softer, sandy strata, which o.ten wash away so as to cause the ledges of rock to tum' le down. Sundstone of better quality occurs in N. E. Wilkinson. on the waters of Buffalo River, and on Homochitto. Near Mealville sandstone crops out in several localities on the Homochitto, interstratified with gray clay, and with all degrees of transition from clay to san Istone, as well as, in one anl the same block, from the Fort Adams rock to that of Grindstone Ford. Such is the case at a bluff on Judge Cassely's land, S. 32, T. 6, R. 5 E., where about 20 feet of these, materials are exhibited; about a mile lower down, according to Judga Cissedy, a deposit of lignite underlies these strat, in the bed of the river. On a hilltop about 6 m le due S of the outcrop mentioned, there occurs a singular deposit of orange-colored cilcareous clay, a special discription of which is given further on (4296). A few miles W. of this point, there is a quarry of rock very smr to that of Dixon's quarry and Grin Istone Ford, and S. of it we fi ud, for several miles, gray clays appearing on the hillsides. • 237. With th development of the formation in Aurto county, I am not aquainte l. In W. Pike county, I have seen it only at the N. end of Magee's cut on the N, O, J & G. N. RR., S of Bogue Chitto Station, where a stratum of gray lam nitel clay interstratifiel with sin 1. appears, 15 fect thick at first, but disappearing with a southward dip. At Holmesville, wells of a gre ter depth thin 20 to 25 feet, str.k. b'us or black fetid clays, in which lignit zed trunks, and other vegetable remains are said to be found. In E. P.ke county, "blue dre" is frequently struck in wells-thus at 5 to 10 fest on S. 24. T. 3, R. 11 E. (Mr. Cɔn »rly's). Further E we find a deep blue, meagre clay cropping out on the banks of Pearl River, at Pope's Ferry, below Columbia, Marion county. The ! T238, 239, 240, 241] MARTON-LAWRENCE-CCIIAE-SIMPSON. 151 same material is said to be frequently exhibited on Pearl River helow the Ferry; the only one I have examined is Burnett's Bluff, near Spring Cottage P. O., Marion county (about S 18, T. 1, R. 17 WV.), a section of which is given further on (¶302). It consists essentially of green and blue clays, of various degrees of ineagreness, of which about 32 feet are exhibited, overlaid, on the hills, by about 50 feet of gravelly Orange Sind strit. The same materials crop out on the creeks inlind; an analysis of one of them is given in the place above referred to. 238. Between Columbia and Monticello, outcrops similar to those just re'erred to, occur with frequency, and high bluffs of the sime appear about 10 miles above Columbia, near Mr. Ben Barnes', whose interest in the use of the materials of these bluffs as fertilizers has given them some note in the State. A spécial profile of one of them is given in another place (¶299); its chief interest is derived from the fact that one of the strita is strongly impregnated with car- bonate of lime, which occurs in layers and veins, and at one point seemed to contin chelonian bones--but the most diligent search could not detect any other fossil remains-An analys's of this materal is given further on (4300). On the banks of Pearl River at Monticello, we find a few leet of the clays in question-the lowest stratum visible being heavy blue clay, gradually becoming more sandy further upwards, and finally passing into yellowish and gray laminate clays. Fraginents of lignitized wood, with iron pyrites, occur in this blutf. In the latter, strong mineral waters are obtained. Westward of Monti- cello, a ledge of gray ish-yellow calcareous sindstone about two feet in thickness, is seen in be ls of the creeks, overlying th se clays; an in its turn overlaid by similar materials, which further inland, form numerous bald, gray clay hilltops. The same occurs in the ridges opposite Monticello, in E. Lawrence, where strata of lignite are said to be found, and on the Monticello and Westville road, we find the gray clay interstratified with small sandstone ledges at two or three different levels. 239. On the portion of Pearl River embraced in Simpson an' Copiah, both gray or blue clays, and sandstone ledges, appear in several localities, both on the river banks and on the confluents. Thus on S 27, T. 9, R. 21 W., on Pearl River, where gray and reddish gray clay occurs inters ratified with sandstone ledges, some of which exhibit a dip of about 45 deg. `S. E.-owing no doubt, to a local fault, since dips in various incompatible directions are repeatedly met with in Simpson county.--Higher up, at Rockport, a jagged ledge of sandstone resembling the Fort Adams rock, runs out into the river from Loth sides, for 20 to 50 feet on each, so as to narrow the channel considerably-the surface of the ledge being about 3 feet above low water, and overla d as well as underlaid by gray el y, which also appear in streams on the Copah side. 240. On Strong River, so far as it passes through Smpson county, there are numerous outcrops of the clays, and clayey sands of the Grand Gull Group. One occurs at the bridge on the Westville and Brandon 10ad--another, and the best exposure in the region, ison S. 10, T. 6, R. 20 W., near Banks' bridge, and in Mr. Barber's field. Near the bridge, strata of whitish materials, varying from soft sand and clay, to sandstone, crops out, with a dip varying from 15 to 20 deg. W.; taking this dip into account, about 110 feet are exposed vertically, although the outcrop is now here higher than 40 feet. The materials here con- tain abundant vestiges of leaves, but so poorly preserved as to be generally irrecognizable; the only form made out with certainty, was a fragment of a fan-shaped palm-leaf: Hall a mile W. of this spot, in Mr. Barber's field, the strata are horizontal, lignite and very fetid, their surface being covered with a yellow efflorescence of salts. • 241. The materials of the formation in S. Rankin are prevaler tly sandy, generally white "rotten" sandstones, but yet frequently interstiat fied with lignitic, and generally very fetid and saline, clays. Outcrops of this kind are very common on the waters of Steen's Creek, where the saltiness of the clays gives rise to numerous cattle-licks; in some instances, the cattle have eaten 152 [1242, 243, 244 GEOLOGICAL REPORT. - caves into the hillsides; and I have found a crust of white salt, 4 inch thick, formed by evaporation on a ledge of clay in the bed of Steen's Creek. Very nearly the same phenomena obtain on Campbell's Creek waters; a good outcrop occurs at Tucker's mill, S. 14, T. 3, R. 3 E. In one well near Cato (Cox's), a solid ledge of gypsum 10 to 12 inches thick, imbedded in gray clay, was passed through; most wells have saline and gyp- Beous water. 242. It has been stated that most of the sandstones of this group, when exposed to the weather, show a tendency to cleave at right angles to the plane of stratification; hence such blocks frequently appear in the shape of short angular prisms, often of great regularity. This peculiarity, which may be observed in almost any outcrop from Grand Gulf eastward, has in several instances led to the belief that these forms were the result of human agency, and this has more especially been the case with a hard cherty ledge of sandstone which crops out on the banks of a branch some distance E. of Cato, at Mr. J. Morrison's (about S. 13, T. 3, R. 2 E.) This ledge underlies the entire hill at the foot of which it crops out, as has been demonstrated in digging wells; at ❤ne point, however, its surface has been exposed to a considerable extent, forming a "platform" or "pavement," known even beyond the limits of the County of Rankin. At this point, the bed shows the usual regular prismatic cleavage; its upper surface is very level and smooth, its lower jagged and nodular, precisely as would be the case had the indurating (siliceous) solution attained its natural quiet level in a basin of sand. The fragments of rock fit each other closely on the uneven and obviously cleaved surface, in a manner which no amount of human labor could possibly effect, unless on polished surfaces; besides, a stroke of the hammer produces similar forms on a smaller acale in any one of the supposed flagstones. It is quite likely that the spot may at some time have been a resort for the aborigines; since relics of human art are said to have been found in its surroundings, and tracings on the surface of the rock; but th: ledge itself is clearly the work of nature. 243. In E. Simpson, and S. Smith, the Orange Sand covers the surface so thickly that it is only occasionally we find any of the materials of the Grand Gulf Group. At Jaynesville, fetid black clays were struck in a well 30 feet deep, dug by Mr. Magee in a bottom; generally, the Orange Sand is not passed through. The sandstone occurring near Raleigh, and the gypseous clays found in a well, have already been mentioned (¶227); the strata found are a mere repetition of those on Steen's Creek. On Leaf River, at Kees' bridge, S. 8, T. 1, R. 8 E., we find a stratum of deep blue clay, covered with saline efflorescences. In one well, near at hand, on S. 2, same T. & R., the clay was bored into for 30 feet, some lignite being struck in it. White sandstone, also. is said to be found in S. W. Smith county. I have not, as yet, examined the counties of Covington, Jones and Perry; so far as I have heard, Orange Sand alone prevails there; it is likely, however, that in the deeper channels, the materials of the Grand Gulf Group may be exhibited. 244 On the Chickasawhay and Pascagoula River, I have found these materials outcropping in four localities. The most northerly is at Col. Sam. Powe's, 2 miles S. of Winchester, Wayne county; a locality of the highest interest in the study of this formation, on account of the well preserved lignitized trunks of trees found there; not only in situ in the bank, but absolutely on the spot on which they grew, with their stumps standing and roots imbedded in the ancient soil, on the surface of which we find the vestiges of numerous successive layers ●f leaves, separated by thin sheets of whitish sandy clay-the results of the autumnal fall of leaves, and winter overflows. The whole of this remarkable deposit is covered by about twenty feet of Orange Sand strata, as exhibited in the following section : T245, 246] FOSSIL PALMS AT POWE'S-AVERA'S BLUFF. 153 (Sec. 35.) SECTION OF FOSSILIFEROUS STRATA AT SAM. POWE'S, NEAR WINCHESTER, WAYNE COUNTY. • FEET. INCHES CHARACTER OF STRATA. 18 Yellow sand, with pebbles in its lower portions Orange Sand. 0 18 White sand with nodules of pipeclay. 1 Black clay with leaves. 3. 10 5 Grayish white sand, with vestiges of leaves on. stratification lines. Bluish sandy clay, with roots and trunks of Cupuliferae, Coniferae and Palmae. 4 3 2 The trunks are prostrate, many of them washed out of their matrix by the river, and resemble common old logs." They retain their roundness, are quite light and porous when dry, but absorb water like a sponge, allowing of its being squeezed out. Two cuts of a common saw will readily sever a trunk 12 inches in diameter. Most of them are dicotyledons, a smaller portion Conifers; and next to these, tree palms, one trunk of which was about 8 inches in diameter, its fibres pulling out of the soft lignitic mass, like those of a corn-stalk out of its pith. I also found, and followed up, a scaly palm root for about 4 feet. The dicotyledonous woods found resembled mostly those of oaks and beeches. + : 245. Descending the Chickasawhay, we next find a long outer p of compact, bright blue clay, in a bluff at Mr. W. P. Avera's place, SS. 25 and 36, T. 5, R. 6 W., Greene county. About 15 feet of this material are visible above water, overlaid by the same amount of yellow sand, in which silicified wood is common. Chalybeate and saline waters flow from the stratum in several places, and according to Mr. A., brilliant metallic lumps-of iron pyrites-are found in the mass. At Venson Williams', 7 miles below Averas', we also find blue clayey sand in the bed of the river. Gray clay is seen outcropping on the hillside at Judge Fairley's Ferry, not far from Cross Roads P. O, Jackson county; and similar clays appear in the hills E. of the P. O., where they contribute essentially to the formation of the soil. 246. At Dwyer's Ferry on the Pascagoula River, S. 11, T. 5, R. 7 W., we find the following section, on the river bluff: сл 5 NO. 154 [T217, 248 GEOLOGICAL REPORT. (Sec. '36) SECTION OF BLUFF AT DWYER'S FERRY, JACKSON COUNTY. 4 FEET. CHARACTER OF STRATA. 2 | Yellowish, indurate clay-- Flatwoods Clay." Gray sand with yellow dots, containing particles of lignite, and crystals of gypsum. NO. 7 Gray sandy clay with lignitic layers, traces of leaves, and crystals of gypsum. 3 4 | Blue massy clay, with crystals of gypsum. 2 12 Stratified, gray clayey sands, cleaving into layers 1 to 6 inches thick. This is the last outcrop observed in this direction, bearing the character of the Grand Gulf Group. NEWER TERTIARY? OF THE COAST. 247. It has been mentioned, when speaking of the Orange Sand Group, that its characteristic strata extend, in several points. 10 within a few miles of the Gulf Coast. It overlies there a forma- tion partly marine, partly fresh-water, consisting chiefly of gray or black, fetid, ill stratified, massy clay, which forms the impervious stratum to which the "Pine Meadows" of the coast region owe their peculiar features (see "Sea Coast Counties"), and extends seaward into the Mississippi Sound, where it constitutes the “blue clay bottom" of the deeper channels, beyond the sands of tho beach. It is reached at moderate depths along the whole coast, and renders the water of wells undrinkable, whenever it comes in contact with the "black mud." Notwithstanding that at Pa-s Christian, for instance, the stratum is reached at 7 feet, it is but rarely so exposed as to afford good opportunities for observation, and the brief space of time which I have spent on the coast, has not allowed me to search for them, systematically. I shall simply give, therefore, the data I have thus far succeeded in obtaining, without attempting to fix the precise epoch which these strata may represent. 248. On the Bayou Bernard, near Mr. Bell's, on S. 15, T: 7, R. 11 W., there is an outcrop some 300 yards long, of about 8 feet of dark, bluish-black clay, which is very tenacious, fetid, and irregularly stratified. In this there occurs a lenticular mass, about 10 yards long and 2 to 2% feet thick, of white shells imbedded in clay similar to that which surrounds it. These shells are very much decayed; we can nevertheless recognize the common living oyster, Õ. Virginica, which forms their in in mass; adhering to the oysters, we find occas onal y the common Bulanus (Barnale, of the Coast, together with Mytilus hamatus, which at present, also, is generally found clinging o the oyster. No signs of other fossils were found in the clay surrounding the shelly mass. T249, 250] COAST PLIOCENE ?—SAUCIER bluff. 155 Wells in the neighborhood strike this clay at the depth of a few feet; the water being altogether undrinkable. 21) According to inform ition given me by Mr. H. Taylor, of Pass Christian, shells appear imbedded in both banks of Wolf River, about 20 miles (by water) above the Pass. This locality I have not visifed. Lower down. at Mr J. Saucier's, S. 20, T. 7. R. 12 W., on Wolf River, there is a bluff about 30 feet high, affording the following section: (Sec. 37.) SECTION OF NEWER TERTIARY? AT SAUCIER'S, ON WOLF RIVER, HARRISON COUNTY. • 20 FEET. CHARACTER OF STRATÁ. Gray and yellow sand, stratified, more or less clayey, especially below. l 2 to Yellowish gray, massy clay. 3 7 8 Matrix of dark gray or black clayey sand, or muck, inclosing trunks, stumps, roots and knees of Cypress, with bark and wood preserved. Also a few pine burrs 2 The whole of stratum No. 1 cannot le better described than as the soil of y cypress swamp, with its muck, fallen trunks, knees, stumps, etc. Of these there are evidently several generations, separated by inore clayey layers of inuck. The fibrous hark of the cypress is perfectly preserved; the wood is yellowish and soft, but by no means lignitized (cutting very neally like that of the Tupelo tree', and its structure and shape perfect. A few hundred yards below this spot, we find a similar deposit, in which, instead of the cypress, the wood, burrs and decayed leaves, apparently of the Short-leaf Pine, prevail. It is said that similar outcrops occur further up on Wolf River. Moreover, Col. J. J. McCaughan, of Rosalie, as well as Mr. H. Tavlor, above mentioned, state that similar deposits have been found in numerous wells along the coast; ani that about 3 miles E. of the Pass the black clay, with cypress knees, crops out on the sca-s ore. It is possible that some of the stumps and roots observed on the sea-beach, and attributed to the living trees of the beach, belong to this deposi¹, especially if, as is stated, many of th 'm should turn out to belong to the Cypress, which at present is not found within many miles of the coast of Mississippi, however abundant on that of Louisiana. In several bluffs of Wolf River and Bayou Delisle, we see layers of dark colored sand, possessing a lignitic odor, which seem to indicate, whenever they occur. the proximity of the black clay formation. 850. At West Pascagoula, in the well at Mrs. McRae's residence, the following section was obtained : Ten or fifteen feet of sand, then about ten feet of blue clay with yellow streaks, then ten feet of sky-blue clay; then a bed of gray, calcareons, water-be ring sand, containing abundance of shells. Of these, the few I saw were identical with species now living on the Coast, and their state of preservation scarcely other than that of the shells imbedded in the sea-Leich NO. ON 1 156 [T251, 252, 253 GEOLOGICAL REPORT. : sand for a few years. The water struck rose to within 15 feet of the surface: it is a saline, sulphureous chalybeate, too strong for ordinary use; it is very similar, on the whole, to that of Ocean Springs. The level of the water is probably by several feet above that of the Sound. 251. Near Pearlington, heavy gray clay crops out in washes on the roadside. Thence up to Habolochitto, similar strata appear near the surface in several points. At the latter point, however, in a well dug by Col. Kimball, 40 feet deep, after passing though some 25. feet of sand and gravel, a deposit of marine shells was struck, in a gray sandy material. I did not see any of the shells found in the well, which was dug 17 years before; but Col. Kimball says they were quite friable.--Thence northward, nothing but Orange Sand is seen, until we reach the neighborhood of Burnett's Bluff, before mentioned (¶237; 302). USEFUL MATERIALS OF THE TERTIARY FORMATIONS. 252. Useful materials of the Northern Lignic. These consist chiefly of Lignite or Brown Coal, and clayey materials of various kinds, some suitable for firebrick and pottery; others for the manufacture of alum, and doubtless, with proper precautions, for manure also. The extensive Lignite beds of this formation have not as yet received that special attention and study which their great ultimate importance deserves. Although in general inferior, as a fuci, to bituminous, or stone coal, the better qualities of lignite can be, and are made to subserve, most of the purposes to which the former is applicable, the most important exception being, that on account of their softness and tendency to cleave when carbonized, the lignites cannot be successfully converted into coke. In its heating effect, as well as in other respects, lignite stands intermediate between wood and bituminous coal; being in fact nothing more than an imperfectly formed coal, and showing transitions into true coal as distinctly on one side as it does into wood on the other. Examples of both these transitions occur among the lignites of Mississippi; hence there exists in this material, as may be supposed, a great diversity of aspect as well as of quality, which it is of the highest importance to take into consideration properly, in its exploitation. As a good practical rule (not, however, without exceptions) we may say that the nearer a lignite approaches, in its general aspect and character, to bituminous coals, the higher will be its effective value. Thus far, the eye of any moderately attentive observer will enable him to estimate the quality of the material. There are besides, two other chief points requiring attention, viz: the amount of ash yielded in burning, and the extent to which iron pyrites, or bisulphuret of iron, is present; the less there is of both of these, the better. 253. It is but rarely the case, that the whole of a bed of lignite of any consid- erable thickness, is of uniform quality. Even small fragments often exhibit great diversities within their mass, and hence experiments on a small scale, on mere specimens, may be far from yielding results applicable to the whole bed, unless selected with especial care. The mass of lignites is almost always lamina ted, i. e., it shows a tendency to cleave into plates of greater or less thickness, and frequently of different kinds of coal-some being of a dull, earthy aspect, others brilliant like true coal. This tendency is often such, as to cause blocks which were quite solid when wet, to exfoliate anl crumble into small flat pieces, which cannot generally be used as fuel. It is necessary, therefore, in most cases, to allow the material (which is generally very wet as taken from the mine) to dry slowly, in stacks or piles protected from the immediate rays of the sun. ¶254, 255) LIGNITE- DETERMINATION OF ASH-PYRITES. 157 254. It is in the cracks and fissures corresponding to this horizontal cleav- age that we may generally observe best whether or not any unusual amount of ash or pyrites is present. We often find the beds subdivided into several stages, by bands of clay or sand, and the same is often the case with the minor sub-divisions, or the plates into which, when rapidly dried, lignite will generally cleave. Of course the amount of ash may thus be increased to such an extent as to render the material, such as it would be when obtained on the large scale, unfit to serve as fuel. It is not always, however, that the admixture of an excess of mineral matter can be perceived by the eye; it may rise to 50 per cent. and more, and the substance still retain the aspect of lignite; though gen- erally, in such cases, it is less firm, and gradually passes, through many grada- tions, into soft lignitic shale, or lignitic clay. These can, of course, be readily distinguished from true lignite by trial in the fire, where lignite, available as fuel, ought not to leave more than 30 per cent of ashes at most-not sufficient to allow of the form of the fragments being preserved after combustion. Few lignites used on the large scale, contain less than 2 per cent. of ash; from five to twelve per cent. is, perhaps, the most usual amount. I have thus far exam- ined but few specimens of Mississippi lignite in this respect; the determinations prove it to be very variable, here as elsewhere: 1. Compact, massy lignite, from Mr. Moses Bridges, S. 33, T. 18, R. 10 È., Chioctaw county. Black, fracture conchoidal, lustrous. Ash greenish yellow, light. 2. Lignite from Hughes Branch, S. 8, T. 10, R. 2 W., Lafayette county. Brownish black; fracture earthy, cleavage slaty. Ash grayish white. 3. Same as above, from a locality a few hundred yards distant. Ash gray- ish white. 4. Lignite from Mr. Vineyards, S. 10, T. 10, R 1 W., Lafayette county. Grayish black, fracture earthy, with some shining layers of pitch-coal; cleavage slaty. Ashes faint reddish yellow. 5. Lignite from Spears' Cut on the N. E. & S. W. Alabama R. R., east of Marion, Lauderdale county. Black, shining; fracture conchoidal, cleavage laminated. Smells strongly of sulphur in burning; ashes reddish brown, heavy. From AMOUNTS OF ASHES IN LIGNITE. Ash. 1. Moses Bridges, Choctaw county (¶265), ....4.38 per cent. 2. Hughes' Branch, Lafayette county-(¶263),—1..22.29 '' 46 (4 ({ 3. 4. Mr. Vineyards, 66 ({ II..16.22 (T263). .24.20 (C ( CL 5. Spear's Cut, Lauderdale county.... (¶179), . • • .17.28 255. As to iron pyrites, its presence, to any great extent, is a serious draw- back in several respects. it causes the coal, when exposed to the atmosphere, to exfoliate and crumble, on account of the transformation of the pyrites into copperas; in burning it causes it to exhale offensive sulphureous fumes (sulphu- rous acid), at the same time attacking the grate or furnace to a much greater extent than would be the case with a coal free from this substance; finally, it increases largely the weight of the material and of the ash.-Generally it is not difficult to recognize the presence of this material. It often appears in flattened lumps resembling cast metal, of colors varying from golden yellow to the pale tint of Britannia ware, on the cleavage planes of the coal; or diffused through its iuass, in small rounded particles, or angular crystals, of the tints above men- tioned. Sometimes, the mass of the coal may be comparatively free from pyrites, even though the latter may be present in plates or layers in some particular portion of the stratum, easily separated from the rest; at others, the mass may be full of minute particles of the mineral, invisible to the eye. In any case, it is easy to determine the point by burning a sample of the lignite, when not only the stinging sulphureous odor of the smoke, but also the red tint of the ash, 158 [T256, 257, 258 GEOLOGICAL REPORT. → may be taken as indicative of the extent to which the sulphureous mineral exists in the mass. In burning the sulphur is driven off, while iron remains behind in that condition (peroxide) in which it exists in red ochre or in Venitian Red. If the ash is white, yellowish-white, greenish, or gray (as is the case in most of the lignites of Mississippi which I have tested in this respect), or only slightly reddish, it may be taken as a proof that there is not enough of the mineral to injure the quality of the fuel, either as to solidity or for other purpos、s to which it is applicable. 66 256. I ought to mention, in connection with this subject, a simple method by which Lion Pyrites, or sulphuret of iron, can always be distinguished from any of the metallic ores for which it is so fiequently mistaken. A most all the tales, of mines or minerals discovered in this State, have started from the discovery of lumps of this mineral, which most frequently occurs within the lignitic formations of North Mississippi, Loth tertiary and cretaceous. The trial usu- ally given it by persons in the country, is melting it down in an iron spoon in a blacksmith's forge-adding to it as 'fluxes," not unfrequently, sulstances which, like blue and white vitriol, sugar of lead, etc., themselves contain other metals; these, uniting with the sulphuret of iron, form metallic looking lumps when melted down in the high heat of a forge. Even the pyrites by itself, however, when melted in this way, will produce a regulus, which is variously claimed as being zinc, brass, tin, silver, etc., according to the fancy of the discov- erer. The high heat used in this process, or the addition of fluxes of any kind, or both, serve only as hindrances in arriving at any definite result; but by attending strictly to the following direction.s, a certain, and in this State, an unvarying result will be obtained with all the deceptive yellow, metallic-look- ing ores found in our formations: 257. Let the mineral be powdered, under a hammer or in a mortar, as fine as may le-at least as fire as rifle powder, but finer whenever possible. Then let a small quantity of this powder-not more than three or four thimblefuls-be spread thinly on a clean iron shovel, and heat the shovel to redness—but by no means higher, in an open fire, without bel ows or fan. The mineral will turn black, and then inflame and buin with a blue, sulphur flame, the odor of whose fumes will be readily recognized. Let the flame burn off quietly, without raising the fire; when it has nearly or entirely gone-after the lapse of twenty minutes or half an hour-stir the powder about on the shovel with a stick; crush it if it has baked together (which it will do if the heat has been too high at first), for which purpose the shovel may at any time be removed icm, the fire, without in any manner endangering the result. The powder having been again spread on the shovel after stirring, oast it for a while as before, until every trace of flame is gone. The stirring and roasting may then be repeated, and the heat raised to a full red-though this generally will not le nccessary; for i, after the second roasting, the shovel be removed from the fire, the powder will at first appear black, but on coeling will turn red-the shade varying a little according to the purity of the mineral and the heat employed, lut always between that of a hard-Luim brick and Vénitian Red; if the mineral has not been finely pow- dered, the tint may be made planer by crushing the grains with a hammer; and if the casting has been imperfect, the interior port on of such grains may still be black or biown; lut if roasted again, will also turn red. The red powder is simply red ochie; it contains no metal but iron, which, in the natural mineral, was combined with sulphur. 258. There is another, Lut somewhat slower process, by which pyrites may readily be recognised by any one. Powder the mineral as lefore, put the low- der on a plat, moisten it all over with water, and keep it moist for a few days, in a moderately warm place-say on the mantel. The powder will very scon taste of copperas, which may also be seen on the sides of the plate; and a piece of tan-baik (Black Cak or Black Jack is Lest) will rapidly tuin blue and black, when laid on the powder well wetted. $259, 260, 261] TESTING LIGNITE-LOCALITIES OF OCCURRENCE. 159 Even large pieces of the pyrites generally will, in course of time, undergo the same change will burst open and generally crumble into a powder consisting chiefly of copperas. This change takes place rapidly when the mineral is car- ried in the pocket, the cloth of which it will soon corrode. ་ 259. I have stated above, that good lignites are applicable to most of the purposes subserved by bituminous coal, except (in most cases at least) coking (T252). It cannot, however, any more than the latter, be used in the place of wood charcoal, unless previously carbonized. It has been usual, in this State, in neighborhoods where lignite was discovered, to test its usefulness by trying it in the forge, instead of charcoal, and as might be expected, the results have been unfavorable. But the fault was with the experimenters, for the best bituminous coal is well known to be entirely unsuited to the blacksmith's use, unless when mixed, in small quantities with charcoal. Thus applied, good lignite will be found to answer the same purpose; it cannot, however, be expected to perform what even bituminous coal will not. But for boiler fires, grates, stoves, furnaces, etc., good lignite is found to be little inferior to stone coal; compact varieties resembling the latter, are very well suited also to the manufacture of illuminating gas, and yield a coke suit- able to all purposes where it is not subject to much pressure, or long transportation. 260. It requires indeed, but very little foresight to appreciate the importance of these deposits for the industrial development of the State, It is true that thus far, taking it as a whole, firewood has been abundant, and will be for some time to come, so long at least as manufacturers shall employ, as they do at pres- ent, but a very small part of the productive capital of the State. Should this condition of things change, however (towards which there is now a decided tendency), the call for fuel less costly in its transportation—the distance of which, in the case of wood, will rapidly increase-would soon put these beds of brown coal into requisition. But even as it is, fuel is already becoming expen- zive in some districts, by the increasing distance from the forest, and Western coal, so largely used in the navigation of the Mississippi river, is being bought at enormous rates in our towns, in order to be enabled to replace the open fire- place by iron grates, or coal stoves. There is no reason, save prejudice, why the native lignites should not be used in the same way. It is needless, how- ever, to expatiate on the importance to any State, of possessing inexhaustible beds of a fuel little inferior to bituminous coal. Common sense, as well as the sad experience of older States, teaches plainly how little reliance can be placed on a permanent supply of timber and fire-wool in any well settled district, under the destructive and improvident management of this portion of the nation'il wealth, under which our forests dwindle at an alarming rate, so as even to affect seriously the climates and meteorological phenomena. The increasing floods, not only of the smiller streams, but of the mighty Mississippi itself, tell as plain a tale as statistical data would in ke it, of the destructive sway of the axe. The forests of Mississippi are fist sharing the fate of their brethren in the older States, and the years may be counted after the lapse of which she must draw for her fuel on the coil-fields of other States, unless she should think it a wiser policy to avail herself of her own. 201, Localities of Lignite Beds.—I shall now give in brief a list of the localities where, thus far, lignite beds of practical importance have been observed by myself or others; with such observations ast may tend to give some light to the miner, on their quality and availability. 160 11262, 263 GEOLOGICAL REPORT. In regard to the manner of working these deposits, I ought to say in general, that the roof of the mines will usually require to be supported, more or less, by wood-work; being rarely formed of materials sufficiently rigid to support themselves when spanning any considerable excavation; in beds of notable thickness and solidity, it will be found advantageous to allow a part of the lig- nite stratum to remain above, so as to impart additional firmness to the roof— which, with the aid of pillars left standing on the sides, as practiced in coal mining, will often enable us to dispense with a considerable part of the wood- work. In some cases, the outcropping bed may be worked like a quarry, but more generally, galleries and chambers will be necessary-driven either from the hillside or from a shaft. Attention must be given to the ventilation of these mines, for both the explosive "fire-damp," as well as, more frequently, the "choke-damp, (which is very commonly perceived at the bottom of wells sunk in the lignitic formation), are to be looked for in them. 262. In Tippah county, lignite is found on S. 29, T. 3, R. 3 E., at Squire Street's. The bed occurs in a ravine, between two steep hillcides; its thickness and quality, I have had no opportunity of observing. It was said to burn well in the fire-place and forge. According to Prof. Wailes, a deposit of lignite exists on Snow Creek, S. 7, T. 4, R. 1 E., Tippah county, about 7 miles S. of Salem. According to L. Harper, lignite exists in Marshall and Lafayette counties, on the Tallahatchie River. I have not, however, myself observed, or seen any specimens from that region, save black lignitic clays, with small seams of lignite. These are abundant in the Cornersville region, and is quite likely that lignite beds may exist there also. Lignite beds probably occur in R. 1 E., TT. 9 and 10, S. W. Pontotoc, as they do in the adjoining portions of Lafayette, but I have no definite knowledge of outcrops anywhere in Pontotoc county. 263. Lignite appears, more or less, all along the Yokeney-Patafa River, and on many of its tributaries, in Lafayette county. According to information given to L. Harper by Mr. W. J. Vineyard, lignite crops out at the spring of Union (Baptist) Church, S. 1, T. 10, R. 1 W. The bed is said to be 8 feet in thickness. The bulk of the specimen in the Survey collection is grayish black, of a dull fracture, not very hard, easily crushed, and whitish on the cleavage planes; it contains thin layers, however, of black, shining "pitch-coal." Burns with a bright flame, and leaves 24.2 per cent. of ash, of a faint reddish-yellow tint.--The amount of ash is large, and if the whole mass were of the same character (which is not likely) it would not bear transportation to a great distance. It is the same bed probably, which is met with in numerous localities in townships 1, Ranges 1 and 2 W., Lafayette county, its thickness varying from 5 to 12 feet; there seem to be, however, several minor beds above it, which were observed by Mr. Ward, S. 22, T. 10, R. 2 W.--one 5 inches, another a foot in thickness. The main bed crops out in branches in Mr. Ward's neighborhood; at Mr. Kirkwood's, S. 26 ?, a stratum 8 feet thick was struck in a well at 50 feet; at Mr. Greager's, on S. 14, the thickness of the bed was greater by several feet. It crops out, with a visible + I ¶264, 265] LIGNITES OF LAFAYETTE-YALLABUSHA-CALHOun. 161 thickness of at least three feet, in ravines and in the bed of Hughes' Branch, on the edge of Potlockney bottom, on S. 8, near Mr. S. Ragland's. Its fracture is dull and earthy, structure laminated, but the mass quite solid; it burns easily, with a bright flame. An air-dried specimen yielded 16.22 per cent. of grayish-white ash ; one dried at the boiling point of water, 22.29 per cent. A partial analysis of this ash gave the following result: ASH OF LIGNITE FROM HUGHES BRANCH. Insoluble Matter (Sand and Silex). Potash.. Soda.. Lime.. Magnesia. • Oxide of Iron, and Alumina.. .59.24 .trace .2.52 .8.83 ..0.73 ..25.79 Chlorine, Carbonic and Sulphuric Acids, and Loss...2,89 100.00 The lignite at this point could be easily worked. Lower down, a bed of good lignite (thickness not ascertained) crops out in the bed of the Yockeney River at Price's old mill, S. ——, T. 9, R. 3 W., (see Sec. 20, T172). Still lower down, on Mr. Isaac Taylor's and Z. P. Dew's land, S. 9, T. 10, R. 3 W., on a branch of the Yockeney River; thickness and position not known. Also, on Dr. J. Taylor's land, S. 30, T. 9, R. 3 W., in the banks of the Yockeney River; a stratum 2 or 3 feet in thickness, underlaid by blue clay, which forms the bed of the river, and overlaid by blue sand. 264. In E. Yallabusha, lignite is said to occur in numerous localities, none of which I have as yet examined. A fine bed is spoken of as existing on Robt. Thompson's place, 10 miles E. S. E. of Coffeeville; and another is mentioned by Prof. Wailes, at Mc- Elroy's mill on Turkey Creek. In N. Calhoun, lignite is very generally struck in wells, at depths from 20 to 40 feet, but I have seen no specimens of it. Beds of variable thickness have been struck in wells, near Sarepta-at Mr. Stacks', S. 19, T. 11, R. 1 W.; at Mr. Hunter's S. 28, T. 11, R. 1 W., and very generally in the country between Cowpen and Lucknuck Creeks; in Mr. Ray's neighborhood, T. 12, R. 2 W; it also crops out in the banks of the Loosha Scoona River, just below Old Town. At Pittsboro', according to L. Harper, lignite is found in wells at thirty feet, and sometimes as much as thirty feet in thickness; and a stratum of lignite at least six feet in thickness, is said by him to crop out about a mile N. W. of town, which, from his description, would appear to be similar in quality to that at Moses Bridges', Choctaw county. 265. In S. Calhoun generally, lignite appears to be quite abund- ant, according to accounts I have received from inhabitants. The same appears to be the case in N. E. Choctaw, where the formation resembles closely that on the Potlockney and Yockeney; a bed of lignite has been observed in the neighborhood of Bellefontaine. At Bankston, dark lignitic clay, with a vein of lignite, crops out on a bluff half a mile S. W. of the place; it seems likely that by bor- R-11 162 [¶266, 267 GEOLOGICAL REPORT. ing, heavier beds of the same might be struck, since they are very common further east. Thus, at Moses Bridges' place, S. 33, T. 18, R. 10 E, a stratum of fine compact lignite crops out in the bed of a branch, the thickness exhibited being about 4 feet. The material is thickly laminated, does not crumble in drying; its fracture, on which some woody structure is still perceptible, is of a fine, glossy black, and will barely make a streak on paper. It inflames less easily than the coals of Lafayette county, burns with a bright flame, and leaves only 4.38 per cent. of light, greenish-yellow ash. This lignite will serve well most purposes of stone coal; even coking. At Mr. Henry Wood's, on S. 2, T. 17, R. 10 E, there is an out- crop of a stratum of inferior lignite, about 3 feet thick, composed, it appears, chiefly of small aquatic plants; it therefore crumbles in drying, and seems also to contain a large amount of ash. At Black's Wells, S. 23, T. 17, R. 10 E., Choctaw county, a stratum of lignite of better quality than that at Wood's, and 4 feet in thickness, was struck in a well at about 45 feet. 266. N. Winston abounds in lignite. It is found in a stratum 4 feet in thickness, in wells near New Prospect P. O., and E. of the same on the headwaters of Noxubee. where it crops out abund- antly in gullies, and is struck in wells N. of Webster. I have had no opportunity of observing these beds personally, but from the description given, the lignite appears to be of excellent quality. Between Sun Creek and Trim Cane Creek, in Mr. Dillon's neigh- borhood; on Mr. R. L. Johnson's plantation, on the Houston and Starkville road, and in S. E. Ocktibbeha, W. of the Flatwoods, generally, lignite beds seem to exist. Near Louisville, Winston county, lignite has been struck in numerous wells, at depths between 20 and 40 feet; it also crops out at a spring in the neighborhood. The thickness of the stratum varies from 2 to 10 feet. In some portions of this bed the woody structure is pretty well preserved, in others, almost entirely obliterated. In the eastern counties of the lignite formation, the latter is popularly termed "black dirt." while the accompanying clays are usually denominated "blue dirt." If this designation is to be relied on, lignite must be abundant in S. W. Winston and N. Neshoba, which regions I have not personally examined. Prof. Wailes, however, mentions a lignite bed on S. 30, T. 11, R. 12 E., Neshoba county. 267. In Kemper county, a lignite bed at least 4 feet thick is mentioned by L. Harper as occurring a few miles N. W. of DeKalb. Whether the "black mud" found in wells at Daleville, Lauder- dale county, is liguite or black clay, I have been unable to deter- minc. True lignite, however, is found at Marion, in wells, and the section at Spear's Cut (T179) renders it obvious that a number of successive strata of lignite exist in the formation of that region. Those exhibited in the cut are too thin to be worked profitably. Since, how- ¶268, 269, 270] LIGNITES OF HOLMES-PANOLA. 163 ever, it is likely that workable deposits will still be found in this region, I have bestowed some attention on the quality, and determined the amount of ash contained in a specimen from Spear's Cut. When dry it resembles stone coal rather than the lignites of Lafayette, burns with a brighter flame, and with a strong odor of sulphur; the ash, reddish brown, amounts to 17.28 per cent. It contains therefore a certain amount of iron pyrites, which is finely diffused through the mass, but does not cause it to crumble. 268. I have not heard of the occurrence of lignite in Attala, or' Leake; in Madison county, however, though not outcropping, lig nite beds of great thickness have been struck in wells bored by order of the Rev. J. R. Lambuth, both at Canton and at his resi- dence, S. 2, T. 7, R. 2 E., near Calhoun Station. At a depth of 375 feet a ledge of rock was penetrated, beneath which, for 46 feet, the auger brought up lignite, with only an occasional band of clay (1322). In Holmes county, and generally along the bluff, from Yazoo to Tunica, lignite beds seem to appear with frequency; with these, however, I am acquainted only from hearsay. A bed of lignite, 14 feet thick, inclosed between strata of green clay, is mentioned by L. Harper as occurring on S. 27, T. 9, R. 4 W., Yazoo county, and he states that outcrops of the same occur frequently on the bluff in Holmes county. In the latter county, there are several deposits which have been currently spoken of as being of fine quality. One, according to Prof. Wailes, is on S. 7, T. 14, R. 1E., near Tchula Lake; another "on Funnigus ha Creek, to the east of the crossing of the old road near Coconover's old stand." Other deposits in the same region have been mentioned to me; the stratum probably underlying an extensive area. 269. I have received specimens of iron pyrites, evidently derived from a lignite bed, from Carroll county, but have been unable to ascertain the locality, or particulars.-I am not aware, thus far, of the existence of any lignite beds in W. Yallabusha, although such probably exist on the Yockeney River. In Panola county, lignite seems to be quite abundant, in the fork of the Tallahatchie and Yockeney Patafa Rivers, its beds being of great thickness and fine quality. L. Harper mentions beds of 15 to 16 feet thickness, and of a glossy conchoidal fracture, as occur- ring on SS. 8 and 10 (and no doubt on S. 9 also!) T. 10, R. & W., and according to information given me by inhabitants, the quality of the lignite as a fuel has already been satisfactorily tested. These beds, occurring as they do, close to the line of the Missis- sippi and Tennessee R. R., in easy communication with the city of Memphis, afford a fine opportunity for exploitation, if the accounts given of them be correct. Lignitic clays are mentioned by L. Harper as occurring on Cold Water River, but no beds of Lignite seem to exist there. 270. Lignite beds of the later Stages of the Lignitic. The only available bed of lignite I have observed in the lignitic beds interven- ing between the Claiborne and Jackson Group, is that on Suanlovey Creek at Garlandsville, mentioned above (197). It is of good qual- ity; about 2 fect of it are visible above the bed of the creek, and it may be of considerable thickness.-The lignitic material occur- ring at Moody's Branch (T204, Sec. 29, stratum No. 2) is too earthy to be available. I have found chunks of good lignite at a sandy bluff on Pearl River, about one mile (by land) above Jackson; but 164 [T271, 272, 273, 274 GEOLOGICAL REPORT. thus far have been unable to ascertain the dimensions of the bed in place. Between the Jackson and Vicksburg beds, the only deposit I know is that at Vicksburg (T220). The thickness of the bed, according to Prof. Moore's observations, does not exceed three feet; yet, from its favorable location on the banks of the Mississippi River, it might be made available, if it should prove of good and uniform quality. Of this, not having examined the sed, I am unable to judge. On the whole, lignite is not to be looked for in extensive deposits, on the territory embraced by the marine calcareous formations, indicated on the map, by the several shades of blue. 271. Upper or Southern Lignitic.-Lignite deposits are much less common on the territory of this formation, than on that of North Mississippi. I have had no opportunity of examining outcrops or even specimens of lignite from these strata. The localities mentioned in ¶234, in Hinds and Claiborne ; a bed occurring near Judge Cassedy's, Franklin county (¶296 and ff.) and another in W. Lawrence, whose precise location I have been unable to ascer- tain-are the only instances I know of the occurrence of lignite on the territory of the Grand Gulf Group. 272. Of the useful Clays of the Lignitic formations, I have already spoken, as far as may at present be necessary or useful, in connection with those of the Orange Sand. The variety and abundance of these materials is very great, and they will no doubt be appreciated hereafter. 273. It may be proper to mention in this place, some local occurrences of use- ful deposits of the indurate clay or siliceous claystone, which sometimes, as has been mentioned (165), is found associated with, or rather subordinate to, the Flatwoods Clay. Generally, this rock forms small, irregular, lenticular masses, or veins, and is often very hard. It seems that in S. E. Tippah, large masses of this rock have been found, in a locality which I have not ascertained precisely, by a relative of S. R. Spight, Esq., of Ripley, The rock somewhat resembles, in color and appearance, lithographic stone, for which it was at first mistaken; it will not, of course, serve the purpose, since it is not attacked by acids. It assumes a good polish, however, and as it is somewhat variegated, it might sub- serve ornamental purposes, if found in sufficient quantity. A similar rock, but a good deal softer, so as to absorb water greedily, has been found in Choctaw county, on S. 23, T. 18, R. 10 E., by Mr. A. J. Worsham. It attracted attention by the adaptedness of its powder for polishing metals with- out scratching, even when it had only been scraped off with a knife, without fur- ther pulverization. The rock would be admirably adapted to hones, but for its absorbent power, which renders it necessary to saturate the whole slab with water or oil before using. Varieties of this rock not possessing this fault, may perhaps be found in the region. It occurs in small slabs or plates, strewed on the hillsides, where its stratum is, according to description, overlaid by about twenty feet of sand. MINERAL FERTILIZERS OF THE TERTIARY FORMATIONS. 274. Ferruginous Greensand of the Claiborne Group-Shongalo Greensand. The highly ferruginous sand occurring in the rail- road cut at Vaiden Station, near Shongalo, Carroll county, and 1275.276] SHONGALO GREENSAND. 165 also in cuts between that place and Rockport, contains a con- siderable percentage of greensand grains, sufficient to render it highly efficacious as a manure. In the two small cuts N. of the deep one exhibiting gray and brown clay (¶183 ff.), several different materials are exhibited; partly coarse sand, forming a soft sandstone, containing impressions of sea-shells, partly clay-all deeply tinged with iron. The greensand grains are apparent throughout the mass, but most so in the sandy portion, and may be readily observed, especially when the mass is crushed and washed with water. The grains are generally about the size of small bird-shot, but flattened, and of a dark green, in part also of a yellowish-green tint. The value of the mass as a manure is precisely in proportion to the amount of these green grains which it may contain. An analysis of the soft sandstone in the most southerly of the small cuts gave the following result : SHONGALO GREENSAND. Coarse sand, and insoluble Silica. Soluble (in NaO, CO² ) Silica.. Potash. Soda. Lime.. Magnesia. • • • • • Peroxide of Iron, with little Alumina. Phosphoric Acid... Carbonic Acid. Water.... • .36.707 .18.298 1.604 0.045 0.166 1.630 34.377 • trace. 0.129 7.012 99.948 275. Potush and soluble silica are the ingredients which render this material of value as a manure, and as such, it would probably be suited more especially to small grain-oats and wheat, and to corn. It will be found beneficial, however, to almost any crop, and the only precaution which it might be necessary to observe in its use, would be to avoid applying it to land badly drained, where the large amount of iron which this material contains might prove injurious in wet seasons; and for the same reason, it is not well suited to being composted with farmyard manure, but ought to be spread on the land either by itself, or mixed with other mineral manures only. The quantity to be used will vary greatly with the amount of greensand grains present. In the mass analyzed, they constitute about one-third by bulk, and of such, dressings of 70 to 100 bushels per acre would no doubt produce an effect lasting for several years; while mass still richer, such as occurs occasionally, might even be used in the drill. No overdressing need be feared, so long as the soil to which it is applied is well drained. The admixture of some lime, or calcareous marl, would serve to heighten the effect greatly, and would be likely to prevent, to a considerable extent, injury which might otherwise happen in ill drained land. The material may be found, no doubt, in other hills in the neighborhood of Shongalo; when near the surface, it may be recognized by the dark orange, or rust color which it imparts to the surface material, while the common surface loam of the country is of rather a pale yellow tint. The same may be said of N. E. Holmes, where, between Vaiden and Rockport Station, the ferruginous greensand appears in the cuts of the railroad. 276. The same material exists in N. Attala, not only in the "Red Hills" themselves, whose soil appears to be formed, to a large 166 [¶277, 278 GEOLOGICAL REPORT. extent, of the clayey materials of these strata, but also in the high hills bordering the Big Black on the south, where it crops out both on hillsides, as at Kirkwood's Ferry, and in the bluffs of streams- always containing more or less of the greensand grains (and impressions of sea-shells--both of which serve to distinguish this material from the common red sand and brown sandstone of the hilltops), which are sometimes washed out and accumulated by the streams in their sand-bars. forming a very eligible manure-as may be observed on Zilfa and Poukta Creeks. I have not, as yet, specially examined the deposits of Attala, nor am I aware how far they extend westward of Shonga o---as they probably do; they may generally be looked for wherever the "red hill" soil prevails. N. E. of Shon- galo, in S. W. Choctaw, these greensand deposits seem to exist likewise; since it is said that brown sandstone with sea-shells occurs there, and these, so far as I have seen, are always associated with greensand. The purple tint on the map, in this region, indicates the probable extent of territory in which these deposits may be looked for; it is quite likely that they may extend through E. Attala into S. W. Winston, N. E. Leake, and Neshoba. 277. Calcarrous marls of the Tertiary.-These may be looked for, more or less, in the whole of the territory. covered on the map by the various shades of blue. Among the great variety of materials of this kind, forming all degrees of transitions imaginable, from the one to the other, we may nevertheless distinguish two chief classes, in an agricultural point of view; to-wit: 1st. The white marls, which consist mainly of carbonate of lime mixed, mostly with clay, but often also with sand, and containing but small quantities of other nutritive ingredients of plants; 2d. the greensand marls, in which the carbonate of lime is accompanied by more or less greensand grains, and more usually by sand than by clay. The former are to be regarded rather more in the light of stimulants, the latter, as true, nutritive manures. [See Agricultural Report, General Part.] Both classes of marls appear in each of the three prin- cipal stages of the marine calcareous Tertiary, and it would seem that one and the same stratum is sometimes developed in one character, at others, in the other; or portions of one and the same stratum, in one and the same locality, may contain these different marls in its several layers. It may be said in general, neverthe- less, that greensand marls are more abundant in the Jackson Group, than in either of the others. On account of the great general similarity of these materials in the several stages, I shall not, however, attempt to describe those of each separately. 278. Of the character of the marls of the Jackson Group in its territory between the Bluff and Big Black River, I have no knowledge thus far, not having visited the localities or seen any specimens. It seems likely, however, from what I have heard of the character of the country, that they are similar to those of Madison and N. Hinds. At Vicksburg (1220) we find strata of bluish or greenish green- sand marl between the ledges of limestone which are quarried in the N. part of the city; and sometimes, we find the same stratum composed of soft marl in one locality, and of limestone in another. The uppermost shell stratum, which appears in the washed gullies near the summit of the hill S. of the creek, is very sandy, though overlaid by a heavy yellow loam of a "prairie" character; lower down, however, as in the gully by the roadside close to the bridge, the blue marl appears rather clayey, its shells being somewhat less numerous than in the upper stratum. An analysis of a specimen from this spot, which seemed to be about an average of the Vicksburg marl, gave the following result: ¶279, 280] MARLS OF WARREN. VICKSBURG MARL Coarse Sand.. Clay and fine Sand 3 700 17.267 Potash. 0.758 Soda.. 0.283 Lime. 37.543 Magnesia.. 2083 • Peroxide of Iron, and Alumina. Phosphoric Acid. Carbonic Acid (and Loss).. Water... 4.722 • D 0.135 30.838 2.657 100.000 167 The 34 per cent. of Potash which this analysis shows, are present chiefly in the shape of greensand grains. It contains, also, a variable amount of iron pyrites in minute crystals, for which reason it would be advisable to expose the marl to the action of the air for some time before plowing it under, whereby a certain amount of Sulphuric Acid will be added to the above ingredients. Judging by its aspect and fossils, this marl represents correctly that of numerous other localities, and will be found a highly efficacious manure for almost any soil. Its low percentage of inert ingredients renders it suitable for transporta tion, inasmuch as but a small dressing will be required of this, in comparison with other marls, in order to secure a fine effect. On light sandy soils, especially when poor in vegetable matter, 250 to 300 bushels of this marl per acre are as much, probably, as could be used without fear of overdressing. Being, to & considerable extent, however, a true manure and not a mere stimulant, much smaller dressings will be found beneficial. 279. Most of the marls found in the ravines of the Walnut Hills in Warren county, are probably similar to that of Vicksburg; as a general thing, it appears that those occurring highest up are more sandy than those from the lower portion of the stratum, and hence, heavier dressings of these would be required. The shell marl cropping out at Amsterdam, on the Big Black River; that overlying the ledge of rock from beneath which, at Brownsville, Hinds county, the spring issues; the marl found on Jackson's Creek, S. 11, T. 5, R. 4 W., that at Stewart's quarry, and the upper strata at Marshall's quarry, are examples. It is probable that in all these localities, a richer marl could be found at a lower level, in deep ravines or on the banks of the creeks; and exposures of these materials may be looked for, more or less, on the whole territory colored bluish-gray on the map. Their great efficiency in the im- provement of the soils of this region, has been shown by an experi- ment made by Mr. Marshall, who has dressed a portion of his land with a mixture of the (rather inferior) marl occurring between the ledges of stone at his quarry, and offall from his lime-kiln. The blue limestone at Vicksburg would also, when burnt, form a valuable manure (T205). 280. A marl greatly resembling that at Vicksburg, and contain- ing still less inert matter than the former, though not quite so rich in greensand grains, occurs in the banks of Pearl River, at Byram Station, on the N. O., J. & G. N. R. R.; and I know of no locality སྒྱུ 168 [T280- GEOLOGICAL REPORT. better suited to the shipment of these mineral fertilizers, of which several varieties occur here. The following section will illustrate the condition of things at and below the ferry landing, on the W. bank: (Sec. 38.) SECTION OF MARL STRATA AT BYRAM STATION (COOK'S FERRY).. + t + FEET 6 CHARACTER OF STRATA. Calcareous glauconitic sand, bluish, with numerous shells (Vicksburg age). 1½ Gray calcareous clay with detritus of shells. Bluish marl, with Orbitoides, Navicula lima, Cras- satella Mississippiensis, Madrepora Miss., Lunulites, Dental. Miss., Arca Miss. NO T2 1 The following analysis gives the composition of the marl forming the stratum in the bed of the creek emptying into Pearl River at this point, and also exposed, more or less, in the river bank itself. It is bluish when wet, but grayish white when dry; quite soft and easily dug, without hard nodules, and containing a large amount both of entire shells, and of their detritus. MARL FROM BYRAM STATION. Insoluble Matter (chiefly sand). * • Potash.. 12.308 0.611 Soda.. 0.179 Lime. 43.932 Magnesia 1.658 · Peroxide of Iron, and Alumina. 2.696 Iron pyrites. 1.266 Phosphoric Acid.. 0.224 Carbonic Acid, and Loss. 34.720 Water and Organic Matter.. 2.396 100.000 The amount of Potash in this marl, it will be perceived, is somewhat less than in that from Vicksburg, to which on the whole, it bears a great general resem- blance. It contains, however, a large amount of Phosphoric Acid and of Lime; the Iron pyrites will render necessary its exposure to the atmosphere before plowing under. The middle stratum (No. 2) is of greatly inferior value, although heretofore, it has been taken in preference to the others. No. 3, the uppermost, blue sandy material is similar to the uppermost marl at Vicksburg and Brownsville, and although containing greensand grains also, its large percentage of inert matter would render unprofitable its transportation to any distance; although, near at hand, it might be used with advantage on account of its easy accessibility. It is. this stratum which forms the overhanging bank just below the ferry landing. Stratum No. 1, which at the mouth of the creek is visible only at low water, is found at a higher level some distance above, near the bend, and is there 9 to 12 feet thick. The profile occurring about half a mile above the ferry, has been 1281, 2821 MARLS OF HINDS AND MADISON. 169 given above (T-23.) Most of the marl is of a quality similar to that of stratum No. 1 at the ferry; some portions (as for instance, No. 3) are more sandy, and contain very large and numerous grains of greensand. The marl could not of course be profitably obtained here unless in quarrying the rock; but other bluffs containing no rock are said to occur above, and may be looked for all the way between Byram and Jackson, on the river banks. I have not as yet specially examined that portion of the river. No marl is found, however, more than three miles below Byram. The great abundance and fine quality of the Byram marl, together with its easy accessibility both by water and rail, render these beds of much more than local importance. 281. We now turn to the marls of N. Hinds, and Madison, which differ considerably, both in their aspect and chemical com- position, from those just described. The materials mentioned above (¶202 and ff.) as occurring in the cuts near Canton and Calhoun Station, represent pretty correctly all those I have seen N. of Jackson. They are generally very clayey—so much so, that they are com- monly styled "soapstone" by the people. In many instances, these clays would hardly be distinguished by the eye alone, from the fat, blue or yellowish, lamina- ted clays, or "blue dirt," of the Lignitic formation, further N.; yet generally, whitish specks, either of carbonate or sulphate of lime, or both, can be detected in them, and where they touch the surface loam, its peculiar greenish, waxen tint betrays the limy nature of the material. Besides, a drop of strong vinegar, or muriatic acid, will always cause more or less effervescence or "boiling," the greater or less violence of which serves to indicate, in some degree, the amount of lime present. The massy ("joint") clays with only occasional calcareous veins, which generally are nearest the surface and contain no fossils (in cuts N. of Canton, and No. 2 of Sec. 26, T203), would rarely be applicable to any useful purpose in agriculture. Not so, however, with those which, though otherwise often greatly resembling the others, possess a laminated structure or cleavage ("come off in flakes"), and contain fossils; such as, for instance, No. 1 of Sec. 26, near Calhoun Station, in which the large bones were found; and the material occurring in the washes by the roadside, between Hanging Moss Creek and Jackson, in which numerous oysters occur. The material is exceedingly variable; at times it is a hard gray clay, difficult to cut with the knife when dry, but exceedingly tenacious when wet; when this is the case, oysters are the only shells to be found in it, and it could serve for agricultural purposes only in exceptional cases, though by no means difficult to pulverize. On the contrary, if a piece be exposed to the sun while wet, it speedily shrinks and cracks in all directions, and is soon reduced to a pile of small crumbs, which the next rain melts down into a plastic mass; and if this happen to take place on a slant, a strong rain brings down torrents of mud. It is in this manner that many of the R. R. cuts between Canton and Jackson give continual trouble, and are rapidly widening (203). 282. From these stiff calcareous clays, containing from twelve to 20 per cent. of carbonate of lime, there is every degree of transi- tión into the yellowish marlstone of the McNutt Hills, with 60 to 80 per cent. of the carbonate; the intermediate stages being soft, 170 [T283 GEOLOGICAL REPORT. yellowish marls, somewhat chalky to the touch, without any visible grains of greensand, and with casts only of small shells, which are generally of a rust color, and form a very convenient criterion of the quality of the marl; for the more of these rust-colored casts of shells it contains, the smaller, generally speaking, appears to be its percentage of inert matter, and the better, of course, its adap- tation to agricultural purposes-all of which may be studied to advantage in the oft-named cuts S. of Calhoun Station, and in most of the cisterns dug between Canton and Jackson. The only complete analysis I have as yet made of any marl of this character, refers to a specimen from the outcrop at Moody's Branch, at the foot of the McNutt Hills, N. E. of Jackson (¶204, Sec. 27); taken from stratum No. 6 of the section quoted. It is yellowish-white, rather loose and porous, contains little sand and but a few fossils-part of which, however, at this locality, retain their shells. MARL FROM MOODY'S BRANCH, JACKSON. Insoluble Matter (white clay and fine silica) • Potash. Soda. Lime... Magnesia. • Peroxide of Iron, and Alumina. Phosphoric Acid.. Carbonic Acid, and Loss. Water.... 37400 0445 0.208 .28.821 1.407 .5.133 0.256 .23.084 .3.246 100.000 The amount of Potash in this marl, it will be perceived, is much smaller than in the greensand marls previously noticed; but it contains a large amount, comparatively, of Phosphoric Acid, and as it is, is a very eligible fertilizer, though not so much a nutritive manure as those before mentioned. 283. I have determined, indirectly, the amount of lime contained in two other specimens, fair representatives of the marls of Madison and N. Hinds. One is a yellowish, calcareous clay, splitting in "flakes," quite hard to cut when dry, containing some large oysters, but no small shells, and occasional crystals of gypsum; forms a plastic paste when wetted. Taken from a gully in the road- side, 3 miles N. of Jackson. It effervesces weakly with acid, and the determi- nation gave: Carbonate of Lime.. (or, pure Lime.... • · 17.471 per cent. ..9.804) Another specimen, taken from a bluff in Mr. Langley's field, near Jackson. Light yellow, cleaving rather irregularly; feels chalky, and exhibits rusty casts of small shells; determination gave: Carbonate of Lime. (or, pure Lime. 62.780 per cent. 35.230) This marl is probably quite similar in composition to that of Moody's Branch (see above), but is richer in lime. Similar marls may be looked for all over N. Hinds and S. Madison, and may very generally be selected to suit the soils, according to their lightness or heaviness. As they do not seem to contain iron pyrites, their exposure to the atmosphere previous to plowing under, will only be necessary in so far as it favors their pulverization. The lower blue strata at Jackson--(Nos. 4 and 5, Sec. 27, T204) T284, 285] MARLS OF JACKSON-RANKIN. 171 which contain the perfect shells, and are exposed under the bridge on Pearl River, and on Dry Creek near its mouth, are generally so sandy, and comparatively poor in lime, that their use for agricultural purposes would generally be too expensive, unless they were very near at hand, and it were desired, at the same time, to remedy extreme heaviness of the soil by the admixture of sand. The character of this bed, however, is itself somewhat variable, so that for instance, at its outcrop on the bank of the River near the end of the road embankment, in Rankin, it is so much less sandy, and richer in lime and greensand, as to form an eligible manure, similar in its aspect to the marl of Vicksburg. I have not, however, as yet analyzed it. 284. With the marls of N. Rankin, and Scott, I am not person- ally acquainted, except through a specimen furnished by Rev. E. B. Sims, from a locality near Morton, which resembles that but just mentioned; and so probably does the marl on Coffeebogue Creek, mentioned by Prof. Wailes. The marl struck in R. R. cuts on the upper Potoc-Chitto, in Newton county, has been mentioned above (1207). Marls similar to those of Madison and N. Hinds are probably, however, the most prevalent; at least, we find them of precisely the same character on the headwaters of Leaf and Strong Rivers, in S. Scott and N. E. Smith-so much so, that all that has been said regarding the yellow and white marls of Madison and N. Hinds, will apply equally to those of the region just mentioned. The yellow calcareous clay in which the large (Zeuglodon) bones occur, in Mrs. Nichols' field, and neighborhood (207), is identical in almost every particular with that occurring on the roadside 3 miles N. of Jackson, which was found to contain 17 per cent. of carbonate of lime, and some gypsum; materials similar to the marl from Langley's field (see above) occur there also, and may be distinguished by the same criterion from the clays comparatively poor in lime. It is probable that greensand marls resembling the lower beds at Jackson, likewise occur. They should be sought for in the lowest situations (beds of creeks, etc.), underlying the yellow clay marls. 285. The marls occurring near Brandon (belonging to the Vicksburg Group-T218, 224, ff.) resemble somewhat, at first sight, the yellow clay marls just described. But while they coincide with them in the absence of greensand grains, and consequent poverty in Potash, they differ essentially in this, that the amount of inert matter they contain is either very small, or when present consists of sand instead of clay; besides which, gypsum is entirely absent from them. The yellowish-white marls of the neighborhood of Brandon contain much less sand than from their grittiness to the touch, one would be led to suppose; the latter circumstance being the effect of the crystalline nature of the calcare- ous particles. Thus, the rough, yellowish-white, often somewhat indurate marl occurring at the bluffs in Dr. I. M. Quin's field, 4 miles S. of Brandon, shows the following composition: A 172 [T286 GEOLOGICAL REPORT. DR. I. M. QUIN'S MARL, RANKIN COUNTY. Insoluble Matter (sand and fine silica). .13.074 Potash... .0.265 Soda. .0.031 Lime.. 46.222 Magnesia. .0.614 Brown Oxide of Manganese.. 0.067 Peroxide of Iron, and Alumina. 2.722 Phosphoric Acid... Sulphuric Acid.. Carbonic Acid. Water... .trace .0.058 .34.754 • .2.050 99.857 A determination of the ingredients insoluble in very dilute muriatic acid, contained in the yellowish-white, soft marl intervening between two limestone ledges in the "rock cut" of the old R. R. track at Yost's Lime-kiln, gave only 6 per cent. of insoluble matter, 2 of which were sharp black sand, the rest a ferruginous, clayey material. The remaining 94 per cent. may be considered nearly pure carbonate of lime, corresponding to 52.75 per cent. of pure lime.- The marl used by Mr. A. P. Miller, is of this character. These marls are therefore to be considered essentially as stimulants, whose continued application, unaided by other, true manures, would in the end exhaust the soil. On account of the small amount of inert matter contained in them, they are equally well suited to sandy and clayey soils; it being recollected, however, that their great purity renders necessary some caution in their appli- cation to light soils, in order to avoid overdressing. Thus, on the sandy ridge soils S. of Brandon, it might hardly be safe to use more than 200 bushels per acre. 286. Besides these pure, white marls, which are to be looked for wherever, in that neighborhood, ledges of limestone occur (between the latter), another material may be obtained, in abundance, above (i. e. always at a higher level than) the limestone, viz: a yellow calcareous sand, containing but few entire shells, but many obscure casts of others; which is seen in the cuts immediately W. and E. of Brandon Depot. This material is very variable; the firmer, the more lime it generally contains. On account of the large percentage of inert sand contained in it, it would not pay for transportation to any distance; but where it is at hand, it would be a fine material for the improvement of the heavy, cold soils which occur in patches in that neighborhood-e. g. at Mr. Jos. Jayne's. For the improvement of hill lands, where transportation is costly, the pure white marls are, of course, to be preferred; so also, for composting, de-odorizing, etc. Outcrops of limestone occur on Richland Creek in several localities (see below, under Limestones), and they are probably accompanied by marl. The only marl outcrop on Richland Creek which I have as yet examined, is at Mr. German Berry's, S. 11, T. 4, R. 2 E., (Monterey P. O.). The blue calcareous sand, contain- ing entire shells, is very similar to the uppermost marls at Vicks burg, at Brownsville, etc., which see. Of the gypseous marls of the prairies of N. Rankin I shall speak in another place, in connection with the soil of these prairies (see Agricultural Report). ¶287, 288, 289] MARLS OF SMITH-JASPER-CLARKE. 173. 287. With the character of the marls in the Polkville region, I am not acquainted; but from what I have heard, they are similar in general to those near Brandon. N. of Raleigh, Smith county, at Mr. Austin's mill (1227), we find marls corresponding in every respect to those at and above Byram, which see (1280); though on the whole, perhaps, they are a little more sandy; in some places they contain a good many greensand grains. The marl into which the pit for the water wheel is dug, is rather inferior to that which is found a few hundred yards lower down, outcropping on Shongalo Creek. Outcrops of a similar character are said to exist on the Okahay, and on Leaf River; the same marl could no doubt be found under the ledges of limestone which come to the surface on the lower slopes of the ridges falling off towards Shongalo and Bowlands Creek, and may be looked for on Hatchushe and West Tallahala Creeks, E. of Raleigh, and S. of the "Hog-wallow prairie" region, in which only the clay marls of the Jackson Group (see above, ¶202 and ff.; 282) are to be looked for. 288. The latter occur, very characteristically, near Garlandsville, and generally on the black prairies, or "shell prairie," on both sides of the Paulding ridge. On the bald prairies S. of Suanlovey Creek, near Garlandsville, we find all the several varieties of the white or yellowish clay marls occurring near Jackson and in the McNutt Hills -heavy calcareous clays with but a small percentage of lime, and some gypsum; and soft, easily crushed marls, with ferruginous casts of shells, resembling those of Moody's Branch and Langley's field (see above, T282, 283), and probably of a similar composition also. The great sandiness of the ridge soils of this region would render these clay marls particularly suitable to their improvement. Of the marls of S. Jasper, I know nothing personally; they are said to resem- ble partly those of the Brandon neighborhood, partly the sandy varieties of the Vicksburg marl-as do those of the same formation in Wayne county. The country being hilly, they appear only in the deep ravines, and beds of water courses. 289. In Clarke and Wayne counties, we have a great variety of mineral fertilizers. Beginning at the north, we find in the banks of the Chickasaw- hay River at Enterprise, strata of shell-bearing, calcareous sand, containing a large amount of greensand grains. The stratum (Nos. 2 and 3 of Sec. 24, 1901) as exhibited in the town of Enterprise, is so rich in greensand grains, that notwithstanding its sandiness, this material would be an eligible manure wherever it is conveniently accessible and does not require to be hauled to any great distance. It is very likely, how- ever, that the river bluff below the town, where a large exposure of stratum No. 3 may be looked for, will be found to contain materials of greater purity, which, for their action as true manures and not mere stimulants, would be of especial value. Portions of this bed greatly resemble that near Shongalo (¶274 and ff.) and it is quite likely that the two deposits are connected, in which case, similar materials might be looked for in N. Newton, Leake, and E. Attala. Sim- 174 [T290, 291, 292 GEOLOGICAL REPORT. ilar beds probably exist on the headwaters of Buckatunna, in N. E. Clarke county. 290. In the S. W. corner of T. +, R. 17 W., we find, on Suan- lovey Creek, at a bridge, a bed of bluish marl resembling that of Byram. The thickness of this marl stratum I have not ascertained -it probably crops out on the creek below this spot also; and the same marl is found near Quitman; and east of the same, on the waters of the Buckatunna. At Quitman, it does not appear in the bluffs of the river, where only a bluish- black, clayey sand is to be seen; it occurs at a higher level, in the wells at Quitman, and at Smith's Sulphur Spring, south of the town, where it very closely resembles the Byram marl, save in that it does not contain (excepting oysters) any well-preserved shells. It is further seen in branches for several miles south of Quitman, where it also appears in the banks of the Chickasawhay River. Thus far the marl closely resembles the blue marls of the Vicksburg strata, containing a considerable amount of greensand grains. Further south, at the crossing of Falling Creek, four and a half miles from Quitman, we find it associated with white, sandy marls without greensand grains, resembling in general those of the Bran- don neigborhood (T218, Sec. 30). Of the marls occurring at this point, the blue (No. 3 of the section) is of course preferable as a manure. On this creek, and on the Chickasawhay River above the mouth of the same, marl may be looked for. On Coonupy Creek, however, and on the Chickasawhay near its mouth, we find brown clays containing no shells, and of no value as a manure. 291. Southward of Coonupy Creek, we once more come to the territory of the yellowish-white clay marls of the Jackson Group. Here, however, I have not met with so much of the stiff clays seen elsewhere; the marl is more generally of the character of that from Langley's field, like which it contains many ferruginous or rusty casts of shells-as may be seen on many of the prairie hill- sides. The marl in the banks of the Chickasawhay at Dr. Ogburn's, S. 21, T. 1, R. 16 E., is scarcely to be distinguished from that of stratum No. 6, at Moody's branch (Sec. 29, ¶204), an analysis of which is given above (282). At Dr. Ogburn's, the marl is so near to the surface of the ground that it can readily be reached in pits dug in the field itself; and its effects on the productiveness of the soil are much praised by Dr. O. The stratum as exhibited on the river banks, underlaid by brown and red clays, is about thirty feet in thickness. 292. South of Dr. Ogburn's, on Garlands Creek, we find exhib- ited two strata of greensand marl, corresponding, apparently, to the blue marl at Jackson, like which, they are overlaid by white marls. The strata occurring in this locality have been mentioned above (¶210); the upper stratum consists of greensand grains imbedded in gray calcareous clay, together with many entire shells. An average specimen of this marl (air- dried) lost 11.944 per cent. of water by ignition, and was composed as follows: ¶292, 293] MARLS OF CLARKE. GREENSAND MARL FROM GARLAND'S CREEK. Insoluble Matter (Silica and Sand)….. Soluble (in NaO CO2 ) Silica. Potash.. ..21.657 ..24.224 1.717 Soda.. Lime.... Magnesia.. Brown Oxide of Magnesia. Peroxide of Iron... Alumina..... Phosphoric Acid. • Sulphuric Acid.... Carbonic Acid.. 0.465 ..14.785 2.476 0.403 .13.020 7.751 0.327 0.566 12.492 99.556 175 This marl is quite remarkable for its completeness as a mineral manure in all respects, containing as it does, large amounts of every essential ingredient (excepting chlorin, which may, however, be present also); being so constituted as to be equally well adapted to light and heavy soils, and without any danger of over-dressing. It is, thus far, the most complete mineral fertilizer I have found in the State. It constitutes about two feet of the bluff at the bridge, being the highest stratum visible below the soil; the lowest five feet consist of a sandy material, also rich in greensand, yet not as much so as the upper stratum. Both proba- bly crop out on the Chickasawhay near or above the mouth of Garland's Creek, and it is possible that the upper stratum may there be found of greater thick- It would pay well for transportion even to a distance. ness. I have received, through the hands of Gov. Pettus, a specimen of marl nearly resembling that of the upper stratum at Garland's Creek, found near De Soto Station, Clarke county, on the M. & O. R. R. 292. In the upland prairies between Garland's Creek and Suck Creek, we again find materials somewhat similar to those of the McNutt Hills near Jackson (T204); Suck Creek itself has excava ted its channel in a solid bed of bluish-white marl, which contains only fine sand and bears no small resemblance, at first sight, to the freshly dug "Rotten Limestone" of the prairies of Monroe, etc. I have not as yet analyzed this marl--it contains small grains of greensand, and while it is certainly very rich in lime, it may con- tain notable amounts of other useful ingredients. Similar materials o cur all along on the road to Gen. Trotter's plantation. At the latter place, there is quite a variety of marly materials, but on the whole they are poor in greensand grains and consequently in potash'; consisting chiefly of lime and sand. The marl in the deep gullies, and the lower portion of the bluff on the Chick- asawhay River, is most sandy, bluish, and greatly resembles the material seen on Suck Creek; while higher up on the hillsides, we find outcropping ledges of soft, yellowish-white limestone (precisely similar to that of the McNutt Hills), alternating with soft strata wh ch appear to be the less sandy and richer in lime and clay the higher up they occur; none of them, however, containing any notable amount of greensand. 293. For several miles above and below the plantation, these and similar marls crop out on the Chickasawhay River. The further southward, however, the more clayey and compact they seem to 176 [T294, 2954 GEOLOGICAL REPORT. become, the upper strata gradually descending to the water level and finally disappearing beneath it, until, at the bluffs above Red Bluff Station, a material altogether different takes their place, as is shown in the profile (Sec. 28, ¶212.) Here we have 50 to 60 feet of a bluish clay marl, almost uniform above and below, and containing chiefly minute, imperfect shells; no ledges of rock appear within it, and traces only of greensand grains. Judging from its effervesence with acids, this marl is limey enough to serve as a strong stimulant dressing, especially on light soils; it is not so well suited, however, to the heavy "hog- wallow soil" which occupies the top of the bluff. 294. Lower down the river, the heavy green clay which appears at the top of the profile (Sec. 28, T212) descends lower, and itself forms the bluff; it is unfit to serve any purpose in agriculture, and and shows neither shells, nor effervesence (" boiling") with acids. Gradually, however, it also descends to the water, and overlying it appear the white marls of the Vicksburg Group, so closely resembling those occurring near Brandon, that it is difficult to dis- tinguish specimens of the two, one from the rock cut on the South- ern R. R. at Yost's Lime-kiln, Rankin county (285), and the other from the bluff of the Chickasawhay at Dr. E. A. Miller's, near Waynesboro', Wayne county; their chemical nature also being, no doubt, essentially the same. At the latter place also, the yellowish-white marl generally occurs between ledges of limestone; nor are even the calcareous sands wanting, which we see in the cuts near Brandon Depot (T218). The latter also appear with frequency on hilltops on the west side of the Chickasawhay, in T. 9, R. 7 W.; and in the streams-as for instance, on Yellow Creek-blue marls resembling those at and above Byram, appear, inclosed as usual, between ledges of rock. Specimens of similar marls have been furnished me from Mr. Waldron's place on the Chick- asawhay, near Waynesboro'. As a manure proper, the blue marls, which generally contain greensand grains, are preferable, of course, to the white, which furnish only lime to the soil. The variety of materials occurring in this region is so great, however, as to deserve a more special examination than, thus far, I have been able to bestow on them; especially in view of the equally great variety of soils, itself owing more or less, no doubt, to the variability of the materials in ques- tion. 2951 No marls are found on the Chickasawhay, so far as I am aware, much below Dr. E. A. Miller's, near Waynesboro', Wayne county. I have not myself visited the waters of the Buckatunna, but from what information I have obtained, the beds corresponding to those on the Chickasawhay from Quitman in Clarke county, to Waynesboro' in Wayne, appear again on the Buckatunna, in a direc- tion south of east, as indicated on the map, and in the intervening tract of coun- try, the marl, together with the limestones associated with it, is found in the ravines and water-courses, and also, where there is prairie, on the hills and hill- sides. A growth of Crab-Apple, Wild Plum, Poplar, Red-Bud, etc., in the hollows, will generally indicate the presence of some of these calcareous mate- rials, near to the surface. The clayey, gypseous marls of some parts of Hinds, Rankin and Scott, which are intimately connected, in most cases, with the bald prairies of that region, will be mentioned in connection with the ¶2952, 296, 297] MARLS OF THE GRAND GULf group. 177 latter, under the head of the Central Prairie Region, as well as below (3032). 2952. Calcareous Marls of the Fresh-Water Tertiary of South Mississippi, or Southern Lignitic.-Calcareous marls, void of shells, and very clayey, occur in limited patches on the territory of the Grand Gulf Group. These deposits are local phenomena-the strata containing them either run out beyond a limited space, or more generally, the material changes its character - loses its calca- reous constituent, and becomes a simple gray clay. It is not pos- sible therefore to trace out such deposits from place to place, as we have done in describing the marls of the marine Tertiary; they turn up occasionally, any where on the territory of the Grand Gulf Group. At Grand Gulf, as the section shows, (Section 33, ¶232), we have calca- reous clays at two different levels, in strata Nos. 1 and 8; the latter especially, in some portions of the bed, would no doubt make an effectual manure. But it is not to be traced at other points of the outcrop, and the same is the case with No. 1, which is visible as such only at the lower end of the bluff. The material might form a good dressing for light soils, buts its quality would not entitle it to more than local importance. The amount of lime contained in the mass may be judged of by the eye, since it forms whitish specks in a green mass. 296. The only other deposit of this character and of any impor- tance, which I know of, W. of Pearl River, is a bed of brown clay marl occurring at Judge Hiram Cassedy's, S. 1 T. 6, R. 3 E., on the hills bordering on the S., the S. fork of the Homochitto, in Franklin county. It forms a "prairie" spot on a hilltop, about an acre in extent, and consists of a stratum some 8 feet in thickness, of a stiff, dark orange-colored clay, inter- spersed with specks of white, limy concretions, which are largest and most abundant in the lower portion (the lowest 3 feet) of the deposit, where they occur of the size of a hen's egg, and sometimes larger. The whole of the clayey mass, hower, effervesces with acids. The spot bears the usual evidence of a calcareous soil in its vegetation, which consists chiefly of Crab-Apple and a species of Red Haw (or Hawthorn), and on its outskirts, where the soil is not excessively heavy, Wild Plum and Honey Locust also; while the other timber is thin and much stunted. The whole was probably once covered with dark colored prairie soil, which is now found only in patches; and it is stated that when the country was first settled, the spot was entirely overgrown with strawberry bushes. 297. The specimen analyzed represents about the average (exclusive of the large lumps of lime) of the lowest four feet. It is a hard, reddish-brown clay, with numerous white specks and veins. R-12 178 [¶298, 299 GEOLOGICAL REPORT. CLAY MARL FROM JUDGE HIRAM CASSEDY'S, FRANKLIN CO. The airdried substance lost 6.818 per cent. of moisture at 212 deg. F., dried at which temperature it consisted of : Insoluble Matter Potash.. 49.475 • 1.242 Soda.. 0.152 Lime.. .13.190 Magnesia... 1.829 Brown Oxide of Manganese. 0.266 Peroxide of Iron.. Alumina.... Sulphuric Acid. Phosphoric Acid. Carbonic Acid. Water.. • 5.538 .12.587 0.033 / 0.132 9.555 • 5.876 99.871 The most remarkable feature exhibited in this analysis, is the large amount of Potash contained in the substance, in the absence of any visible trace of greensand grains. It is highly probable, however, that in consequence of the long continued action of lime on the mass, a large part of this potash, as well as of the other ingredients present, is in an available condition, and that this material will prove a valuable fertilizer, more especially as most of the soils in the neighborhood of its place of occurrence, are very light, and in the case of the bottom soils, extremely so. The large amount of clay contained in the material itself, as compared with its percentage of lime, obviates any danger of overdressing; except in rendering the soil too heavy where it is not naturally very light, by using a very great excess. The most calcareous portions of the mass ought, of course, to be selected, as they will pay best for transportation. Experiments on the efficacy of the material must decide how far the 22% per cent. of carbonate of lime and 1¼ of potash will pay for the transportation of the inert clay. 298. It is very likely that similar deposits occur in other portions of the Homochitto Hills. All bald hilltops having a clay soil do not, however, necessarily indicate the presence of similar materials; I have observed many, both in the Homochitto Hills, in those S. of Fayette, and in other localities between the Mississippi and the waters of Leaf River, in which a heavy gray potters clay, which does not effervesce, forms the soil and supports a stunted forest growth, and generally some long grass. It is only when the Crab Apple, Red Haw and Honey Locust are present in such spots, that the existence of calcareous marls is indicated. Such indications are found in the hills three to five miles south of Fayette, where the trees mentioned, accompanied by the Wild Plum and Poplar, may be observed in several points on the ridge; and have found calcareous veins in an outcrop of gray clay in the roads on a hill- side about three miles south of Fayette. For use on the small scale, in the improvement of gardens, where the expense need not be considered, the clay marl at Judge Cassedy's might, no doubt, be greatly improved by a gentle calcination, which would render most of the ingre- dients available to a much greater extent than is the case in the raw material. In composting manure, it will be found valuable in either case. 299. I have no personal knowledge of the existence of any T300] BARNES' MARL. 179 similar materials between the localities just mentioned, and Pearl River. On the latter, as stated before, blue, green and white clays usually form the material of the strata of the Grand Gulf Group, which appear to be very generally rich in Potash, Soda and Mag- nesia, and often in Gypsum; but it is only in one point that I know them to contain a notable amount of carbonate of lime; viz: near Mr. Ben Barnes' place, SS. 2 and 35, TT. 4 and 5, R. 12 E., Marion county. A high ridge here comes up to the river, and has been washed off into a steep bluff about 110 feet high from the water's edge. It continues along the river for four or five miles below, sometimes coming up close to the bank, but gener- ally at a distance of 200 to 300 yards from the latter, on the west side; its upper portion being formed by deposits of gravel and sand of the Orange Sand Group, the lower, by the gray or variously colored clays and loams of the Grand Gulf Group. The following is the profile afforded by the strata at the "White Bluff," on the sections above given : (Sec. 39.) SECTION OF “BARNES WHITE BLUFF," MARION COUNTY. FEET. CHARACTER OF STRATA. 0 20 25 to Yellow and red sand, and pebbles. (Orange Sand). 30 8 C Gray or yellowish, fine sand, somewhat clayey, and 40 indurate, washing into perpendicular, rounded masses. In some portions quite cellular, the cavities rusty. 3 | Reddish-gray, clayey sand. Yellowish-gray clay, almost white when dry, with 6 veins, specks and nodules of carbonate of lime- 'Marl." 20 Sandy clay variegated with pale red and gray-same as No. 6. 2 | White indurate sand, fine-grained. 7 6 CO LO 5 6 3 Solid gray clay, with massy cleavage, very fat; 6 contains rounded masses, several inches thick, of light 2 green clay, with white laminæ. | 1| Blue sandy clay, as at Pope's Ferry, and Monticello. 300. Of the several materials occurring at this outcrop, stratum No. 5 is the one which at once suggests itself as suitable for use as a fertilizer-more espe- NO. 180 [1301, 302: GEOLOGICAL REPORT. cially on the very sandy soils of the region, which are pre-eminently poor in lime. An analysis of an average specimen from stratum No. 6, dried at the boiling point, gave the following result : BARNES MARL. Insoluble Matter (clay and silex). Potash. • Soda. Lime. Magnesia.. Brown Oxide of Manganese. Peroxide of Iron. Alumina. • • Phosphoric Acid.. Sulphuric Acid. Carbonic Acid.. Water. • • • • • .77.438 0.709 0.101 4.800 1.248 0.316 • 2.989. 6.449 0.111 trace • 3.372 2.554 • 100.197 The large amount of inert matter contained in this material, would prevent its transportation to any considerable distance, on account of the considerable quantity required for an effective dressing. But to the sandy lands of the neighborhood, its application will, no doubt, prove both beneficial and profitable. It crumbles readily on exposure, in a pile, to the atmosphere, but contains no pyrites to render any lengthy exposure necessary. No fears need be entertained of overdressing, unless the application be carried to such an excess as to render the soil too clayey-which is not likely to happen. 301. Here, as elsewhere in this formation, the calcareous character of the stratum does not appear to be contiuned to any great distance. About half a mile below the bluff, we find at the water's edge a gray clay similar to that of stratum No. 5 of the section, but instead of containing the lime in minute specks and streaks, the latter occurs in solid veins or plates to ½ inch thick, while the mass of the clay contains none and is not, therefore, suitable as a fertilizer. Lower down still, at the "Red Bluff," on S. 12, T. 4, R. 12 E. (which is considerably higher than the "White Bluff," the Orango Sand strata superimposed upon those of the Grand Gulf Group beiug 140 to 150 feet in thickness), we find no trace of calcareous veins in the gray clays into which the creek has cut its channel in the lower portion of its course. It is stated, however, by Mr. Barnes, that singularly favorable effects were produced, in experiments made by him on a small scale, by the use, as a fertil- izer, of a grayish, sandy material obtained at the "Red Bluff," and resembling, in its aspect, that of stratum No. 7 of the "White Bluff." I have not myself seen this material in place; specimens handed me by Mr. Barnes do not effer- vesce with acid, but a qualitative analysis showed it to contain an unusual amount of Potash, for the presence of which I cannot account satisfactorily, since there is no trace of greensand in the mass. Future examinations must decide this point. It is to be regretted, that Mr. Barnes' experiments with these fertilizers were not made on a larger scale; but the analysis shows good reason to expect the favorable results reported by him. It seems very likely, that other deposits of calcareous marls may be found in this region, and in the Lenoir Settlement, lower down. 302. It is stated that bald hilltops, overgrown with Red Haw. Crab Apple, Locust, etc., exist in east Lawrence county, but I have had no opportunity of verifying the fact. ..... 9302] BURNETT'S BLUFF. 181 There can be no doubt that locally, a good many of the materials of this formation might be employed in the improvement of soils, even where they cannot properly be considered as marls in the usual acceptation of the term provided only, they be convenient to the tract where they are to be used. The soils of S. E. Missis- sippi show very generally extremes of heaviness and lightness; and whenever the increased facilities of communication shall be such as to render practicable the more costly methods of improvement in the soils of particular localities, the materials of this formation will be called in requisition in preference to others which would not serve the double purpose of a chemical and mechanical manure. [See Agr. Rept., Gen. Pt.] As an example of a material which, though not suitable for transportation to a distance, would form an emi- nently useful addition to any soil to which it could be conveniently applied, I subjoin the analysis of a green loam forming part of an outcrop, a section of which is given below. (Sec. 40.) SECTION AT BURNETT'S BLUFF, MARION COUNTY. FEET. CHARACTER OF STRATA. 4 Orange Sand with pebbles; hilltops about 50 feet more. 7 Gray massy clay, very fat. 4 Greenish-gray, clayey sand. 15 Bluish-gray, fat, massy clay. | 5 Loose green loam, without coarse sand. 1 The air-dried material of the lowest stratum (No. 1) lost, on ignition, 4.967 per cent. of moisture, and gave the following result : GREEN LOAM FROM BURNETT'S BLUFF, MARION COUNTY. Insoluble Matter (clay and silex). Potash Soda... Lime.. Magnesia.. Brown Oxide of Manganese Peroxide of Iron.. Alumina.... Phosphoric Acid. Sulphuric Acid. .83.691 0.827 0.268 0.793 1.053 0.223 4.394 8.347 0.148 0.022 99.761 NO. 5 4 3 182 [1303¹, 303, 304 GEOLOGICAL REPORT. This loam (which was instinctively, from its aspect, considered "rich" by the inhabitants), would from its physical, no less than its chemical constitution, form an acceptable addition to any soil; while the upper strata, which seem to differ from it mainly in the amount of clay which they contain, could be profit- ably employed, where convenient, for the improvement of very light soils. And under similar circumstances, no doubt such materials as those at Monticello, Pope's Ferry, Avera's, etc. (¶ 237, 238, 245) would be equally useful. 303¹. At Dwyer's Ferry, S. 11, T. 5, R. 7 W., Jackson county, materials occur which no doubt could be used with great advantage on the poor soils of that region (T246, Sec. 39). They contain large amounts of gypsum, and probably other fertilizing substan- ces—I have not, however, had time to give them a special examin- ation. The fertilizers occurring in the formations near the sea-coast, are mentioned in the special description of that region, as well as above (¶¶248,249). 3032. GYPSUM, or Plaster of Paris.-The occurrence of this sub- stance on the territory of the several lignitic stages of the Tertiary, as well as that on the Jackson and Vicksburg Groups, has been repeatedly mentioned. It is usually found in crystalline plates, rosettes, or lenticular masses, 1-20 of an inch to 2 inches in thick- ness; but I have not thus far seen it in independent deposits sufficiently large to warrant exploitation of the plaster as such; although it is very likely that such deposits do exist, and if so, they would be of high value in agriculture. In most cases, the mineral is intermixed in small crystals or thin sheets, with clayey materials, so as to be available only in connection with these; forming gypseous marls, whose agricultural value is only thus far inferior to that of pure plaster, as they will not bear transporta- tion so well. Some of them, however, undoubtedly contain other valuable ingredients besides gypsum, and it is possible that not a few of the lignito-gypseous materials found in S. Carroll, Attala, Leake, Holmes and N. Madison (180, 183, 187), as well as in Hinds, Rankin and Scott, will prove valuable fertilizers. I have not, however, thus far given as much attention to their investigation as to that of the more generally important "calcareous" marls, and greensands; an analysis of one of them will be found in the Agricultural Report, under the head of the "Central Prairie Region," whose gypseous prairies owe their exist- ence to the gypseous clay marls. Other data concerning their occurrence are given in ¶¶ 215 to 219, 231, 233, 241, 246. The largest masses of pure gypsum on selenite, of whose occurrence I am aware, have been found in wells near Cato, Rankin county (¶241-a ledge from ten to twelve inches thick); in the railroad cut near Clinton (crystalline masses one to two inches thick and of a square-foot surface); on the gypseous prairies of W. Hinds (Wailes); in Dr. Galloway's well, near Kosciusko (187), and on the Pelahatchie near Mr. J. Parker's (125). 304. LIMESTONES OF THE MARINE TERTIARY.-Limestones suitable for lime-burning, as well as for building purposes, are chiefly found on the territory of the Vicksburg Group. The limestones, or rather, indurate marls occasionally found within the two other groups, are generally too soft for building purposes, and not nearly as pure as the hard blue limestones of the Vicksburg Group. The only locality known to me on the territory of the Claiborne Group, wheré 9305] VICKSBURG LIMESTONE. 183 any solid limestone occurs, is that on Falling Creek, 4½ miles S. of Quitman, Clarke county; so far as I have seen it, however (T195, Sec. 26), it is very sandy, and would make lime suitable only for mortar, and for agricultural purposes. It may be found of greater purity at other localities on that stream. Nor are the marls of this group of sufficient purity to serve as materials for lime-burning. The same is true of the limestones of the Jackson Group. The indurate marl of the McNutt Hills does not resist the weather, and would make very inferior lime for all except agricultura purposes; and the same holds true of the limestones occurring on the Chickasawhay near Trotter's Plantation, Clarke county. It is probable, however, that not a few of these materials will be found, when properly burnt, to possess hydraulic properties—a point I have not as yet investigated, but which, from the frequency with which cisterns are used on the territory of this group, possesses a special interest. Marls like those at Moody's Branch (204), Langley's field, and many of those of Madison, N. Smith, N. Jasper, and S. Clarke, approach very nearly in their composition, to hydraulic limestones; and the same is true of the marl of Vicksburg, and those resemb- ling it. 305. Some of the limestones of the Vicksburg Group are of considerable purity; thus, that at Yost's lime-kiln, Rankin connty, contains only about five per cent. of impurities (see below) which are the less injurious to the quality of the product, as they consist of sand rather than clay. The limestone ledges always occur interstratified (alternating) with marl strata, the thickness of both varying from 1 to 6 feet; the limestone ledges are generally the thickest, ordinarily 2 or 4 feet. The limestone at Vicksburg, (220) whose quality as a building stone and flagstone has been sufficiently tested,* is less pure than that found in Hinds and Rankin; yet it will, if not overburnt, yield a lime suitable for all ordinary purposes, except, perhaps, whitewashing. A partial analysis of the rock as obtained from the quarry in the northern part of the town of Vicksburg, gave the following result : VICKSBURG LIMESTONE. Carbonate of Lime. Sharp Sand.. Other Impurities. ..87.808 ..0.207 11.985 100.000 1 cwt. of limestone will, according to this analysis, yield about 61 pounds of burnt lime, containing between 11 and 12 lbs. of impurities. Among the latter, *The durability of the rock is greatly increased, if care be taken to place it in its natural position, so as to place the stratification lines horizontally and not vertically; in other words, if the slabs be placed "flat" and not "on edge." In many of the stone walls and paving stones of Vicksburg, it will be noted that wherever the rock has been placed on edge, it has split up and crumbled off ("exfoliated") to a much greater extent, than is the case where it was placed on the broad side. In old walls especially, the rocks placed on edge might be distinguished at a distance, by their forming recesses, as it were, below the surface of the others.-The greater permeability of the rock to water in the direction of its cleavage, than at right angles to the latter, explains this phenomenon. 184 [T306, 307, 308 GEOLOGICAL REPORT. however, the eye, and still better the lens, detects a considerable amount of greensand grains, which will render the product especially valuable for agricul¹- tural purposes. 306. Whether or not the limestone occurring at Old Fort St. Peters, above Vicksburg, on the Yazoo, resembles the Vicksburg rock in this respect, I am not informed. It appears that in this locality, the ledges are heavier than at Vicksburg, so that blocks of considerable size can be obtained.-The clay seams mentioned as overlying the best of the rock at Vicksburg (T220), seem to accompany the same pretty generally, and may serve as a convenient landmark in opening quarries. It would seem that lime might be manufactured to great advantage at several points in the Walnut Hills, on the Yazoo River, where timber is so abundant; and so near to the great highway of the West, at all whose ports are annually landed immense quantities of lime, transported at enormous expense from Portland, Maine, to be distributed and consumed in the valley of“ the Mississippi. I am not aware that any limestone appears on the Big Black, in Warren or Hinds counties; it would seem that such must be the case at some point E. and N. E. of Vicksburg, although it might be covered at present by the surface materials. 307. The rock occurring in the town of Brownsville (1221) is rather impure, but would yield lime suitable for mortar, and agricultural purposes. Of the limestone occurring on Baker's Creek, below Bolton's Depot, I have not seen any specimen, nor am I aware of the thickness or character of the strata, which are, no doubt, a continuation of those at Steward's quarry, 3 miles W. of Clinton, and could prob- ably be found at corresponding depths in other localities. The rock at Steward's quarry is purer than that at Vicksburg, and well suited for building purposes, as well as for lime burning, being very similar to that of Yost's Lime-kiln. The same is true of most of the rock at Marshall's Quarry; that occurring near the former residence of Mr. Long; and 3 miles S. of Byram, on the R. R. At the latter place, it does not, however, form solid ledges, but strata of disjointed, cavernous blocks; which circumstance, while- rendering it less valuable as a building stone, in no way impairs its quality for lime-burning. The stratum can no doubt be found in many other localities, and with the exception of N. E. Tishomin- go, I know of no region in the State so well supplied with this useful material, and so accessible on all sides, as that lying S. of the Southern R. R., between Brandon and Bolton, and indicated on the map by the pale bluish gray. 308. At Byram Station itself, as shown in the profile (T280), no limestone occurs, but only soft marls. But within a mile above, the ledges of rock represented in Sec. 32 (T223), cropping out on the banks of the river, offer a fine opportunity of obtaining, not only good limestone, but also very durable building stones, at the same time with the first quality of marls: The smooth, water-worn surfaces of the rock in ledges Nos. 2, 4 and 6, plainly show that it is not likely to give way under atmospheric influences alone. Considering in general, the great resistance of these limestones to decay, which may be seen abundantly illustrated at their outcrops, it is much to be regretted that the soft, easily decaying sandstone of S. Hinds should have altogether superseded it in the erection of public buildings at Jackson. 4309, 310] LIMESTONE OF RANKIN. 185 309. From Byram, the limestone may be traced in occasioual outcrops to the neighborhood of Braudon, where it appears at numerous localities, generally capping the hills (as on A. P. Miller's, Jos. Jayne's and Rev. D. A. Campbell's land,) forming a belt run- ning N. E. and S. W. There are here also, however, several ledges of hard limestone, separated from each other by strata of white marl (¶218). The heaviest stratum, which appears at the same level in several localities in the neighborhood, occurs at Yost's lime-kiln. This stratum is composed of two ledges, separated only by a thin sheet of soft material; the upper ledge, about two feet in thickness, consists of disjointed blocks, very jagged and rough, and its cavities filled with red clay from the surface. The lower ledge is solid, and 2% to 3 feet thick; it is blue internally, but yellowish on the outside, there being, however, no essential difference between the portions so colored. An analysis of a specimen of this rock, taken from the lower ledge, gave the following result: LIMESTONE FROM YOST'S LIME-KILN, RANKIN COUNTY. Insoluble Matter (chiefly fine Sand.... Lime... Magnesia.. Peroxide of Iron, and Alumina Phosphoric Acid.. Carbonic Acid. Water... • . • 2.029 52.474 .0.667 2.125 .0.075 .41.529 1.100 99.924 One cwt. of this limestone will therefore yield about 57 pounds of lime, of which about 4½ lbs. are impurities. 310. The lime made from this rock, when properly burnt, slakes well, and is suitable for all purposes. It has, nevertheless, been thought to be greatly inferior to the imported-to make the mortar less firm, and not to admit of as large an admixture of sand. There is not, in the nature of the material, any reason why this should be so; but I have perceived abundant cause for these effects, in the manner in which the burnt product is often managed. It has been allowed, after burning, to lie on the ground in piles, in open sheds, and has thus been sold in small quantities, after having lain for weeks and even months. Under such circumstances, the purest and strongest lime will rapidly become useless, for it is thus afforded an opportunity of returning to the same condition from which it was originally changed by burning, and in consequence, it loses its property of hardening when used as mortar. When burnt lime is thus allowed to become airslaked, it increases considerably both in weight (more than one third) and volume; so that the purchaser not only buys a worthless article, but also pays for it higher by giving the same price which he would have paid for the freshly burnt product. Burnt lime, in order to preserve its fitness for use in mortar, must be kept from contact with the air as much as possible. It ought therefore to be barrelled or boxed immediately, if destined for sale or transportation; and not as apples er oranges are, simply in order to keep them together, but tightly, like flour, etc. When, however, a kiln of lime has been burnt for use on the spot, and it be inconvenient to use it at once, it may be kept with perfect security and without danger of deterioration, by slaking it in the same manner as though it were to be converted into mortar at once, but afterwards letting it off from the slaking- pan into a pit in the ground. After a time the lime settles, leaving the super- fluous water on top, which as far as practicable may be drawn off; after which, the pasty lime is covered over with sand to the depth of several inches.-Pure 186 [T311, 312, 113¹, 3132 GEOLOGICAL REPORT. 2 lime even improves by being thus kept for a time; but the process is not advis- able with very impure lime, such as that made of the Rotten Limestone (T149). 311. Most of the hard limestone occurring in the Brandon neighborhood is of the same character as that of which the analysis is given above. to Besides being found on the belt mentioned above (¶309), it occurs also due S. of Brandon, near Dr. Parker's, in a little branch on S. 27, T. 5, R. 3 E.; the ledge is not, however, as thick as the one at Yost's kiln, and belongs to a lower level. At a lower level still, on Richland Creek, S. 34, T. 5, R. 3 E., there is an outcrop similar to the one mentioned. These strata do not, however, appear be always continuous, so that the rock is not necessarily found in one hill at the same level at which it occurs in the one opposite. Limestone precisely similar to that at Yost's kiln, was found in Mr. Ware's well, E. of Brandon, at about 40 feet; and again, we find it overlying the marl at Dr. Quin's (see above, ¶285). Dr. Q. has used the rock for lime-burning, and finds it to produce an excellent article. 312. The same limestone occurs, no doubt, further on in a S. E. direction, about Polkville. It is found again in the neighborhood of Raleigh, and crops out on the slopes of the ridges, towards Shongalo Creek, N. E. of Raleigh; the ledges so far as I have seen, are of less thickness than in Rankin, and on the whole, less pure the marl character prevailing over that of the limestone. On the ridge between Shongalo and Bowland's Creek, the rock also crops out, giving rise to terraces on the hills; that which I have seen there, is very rich in greensand grains, and would probably answer better for agricultural, than for architectural purposes. 313¹. I am not aware whether or not any hard limestone occurs on the territory of the Vicksburg Group in S. Jasper, but it is very likely that such is the case, for we see it in Wayne county, if not as abundantly, or generally speaking, of equal purity with that of Rankin and Hinds, nevertheless affording abundant oppor- tunity for the manufacture of quicklime, of good quality. Here as elsewhere, the hard blue or gray limestone is to be preferred to any of the softer and yellowish materials; nevertheless, the pure white marls (294) might, if necessary, be used for the purpose. Blue limestone is found on the Chickasawhay River, at, and för some distance above, Dr. E. A. Miller's place, near Waynesboro'; on Limestone Creek, both at its mouth and further up; on Yellow Creek, in ledges of inconsiderable thickness, interstratified with blue marl; on Cakchey's mill Creek, and others. It is also found on the Buckatunna, S. E. of the localities mentioned. The soft yellowish limestone underlying the prairies and forming bald hill- tops, in this region, is generally better suited to agricultural, than to architectural purposes. 3132. BUILDING STONES.-With the exception of the limited deposits of variegated aluminous sandstone occurring at Reeve's, and on Muddy Creek, in Tippah (T168), no hard rocks but those belonging to the Orange Sand (¶11, 56) occur in quantities useful for building purposes, on the territory of the Northern Lignitic formation. 1314] THE BUILDING STONES-WATERS OF THE TERTIARY. 187 The localities thus far observed of the sandstones and claystones of the Siliceous Claiborne stage, have been mentioned above (T188, 1902). These rocks are generally very durable, where they are not too soft from the first. The limestones of the calcareous Tertiary, some of which are of excellent quality as building stones, have been spoken of above (T304 to 414). The gray and white sandstones of the Grand Gulf Group, whose chief localities of occurrence have already been given, (232 to 236; 242), would, so far as their obvious physical properties, their fre quency of occurrence, and their mass is concerned, form a very eligible and highly valuable building material, but for the draw- backs already referred to (T231), viz: their want of durability when exposed above ground. In numerous instances their gradual softening has been owing, no doubt, to the amount of salts they contain, which in some regions (Campbell's Creek, Steen's Creek, Rankin county, 241), continually effloresce on their surface, and finally reduce them to powder. In others, however (and particularly at the Capitol at Jackson), the chief cause of their decay has been the presence of small concretions of iron pyrites, whose oxidation or vitriolescence causes partly rusty spots, which, though softer than the rest of the mass, serve mainly to mar the appearance of the surface; partly, by the swelling consequent upon this process, breaks out fragments, and rends open large sized blocks; thus serious- ly endangering the security of buildings. The acrid, inky taste of the spots where this process is going on, will readily show to any palate the presence of copperas. Two simple practical rules to be observed in the use of this rock, result from the above considerations. Firstly, the use of any rock or portions of rock, where the brilliant, golden-yellow particles or lumps of the iron pyrites may be observed, or where on surfaces naturally exposed, the rust spots indicate its presence, ought to be strictly avoided. Secondly, the rock when used ought to be protected against the action of air and moisture, by a good coating of linseed oil, soluble glass, varnish or the like; and the same means may be employed to arrest the process of decay where it has already commenced.-It also follows, that when the rock is used in works little exposed to the action of the atmosphere, and changes from wet to dry (as in foundations, etc.), there is less danger of a change in its mass. 314. WATERS OF THE TERTIARY FORMATIONS.-a. Waters of the Lignitic Groups.-It is but rarely that waters derived essentially from the strata of any of the lignitic stages of the Tertiary, possess that degree of purity which would characterize them as "free- stone waters." Those derived from the materials of the Grand Gulf Group are almost without exception, mineral waters proper; i. e. sufficiently strong to be recognized at once by the taste, and in the majority of cases, unfit for constant and daily use. In a less degree in general, this is the case also with those derived from the Lower or Northern Lignitic Group, and from the minor lignitic stages of the Tertiary generally. It is, ordinarily, only where yellow sands enter largely into the composition of the strata of the Northern Lignitic Group (as is the case most frequently where 188 3315. 316 GEOLOGICAL REPORT. lignite beds occur) that we find in them springs or wells whose water is but so slightly contaminated with the salts which charac- terize all more or less. as not to interfere with the ordinary uses of well and spring water. 315. It cannot, therefore, be surprising, in view of the extensive territory occupied, more or less, by these formatious, that mineral springs and wells should be reported from all quarters of the State; their inconvenient abundance being such, that in extensive regions a draught of pure water can be obtained only from cisterns and streams, and that the former are of necessity used, notwithstanding the abundance of water to be found in wells. Were it not for the superincumbent beds of the Orange Sand formation, whose very general distribution over the surface has so often been noticed, and which afford the purest of water, even though often at inconvenient deptl:s, the State of Mississippi would find itself in great st: aits as regards the quality of its waters. For however acceptable may be the presence of mineral waters here and there, yet their universal prevalence, to the exclusion of pure water, is scarcely less undesirable on the land than it is to the mariner at sea, when he finds him- self deprived of all but the ocean brine wherewith to slake his thirst. We might as well attempt to substitute the drugstore for the provision market; and it is not a little singular, that such a vast number of persons, who religiously eschew to the last extremity the help of a physician, through distrust of medicines, should not only willingly, but eagerly, be dosing themselves, day after day, with natural solutions of the very substances which, if coming from the drugstore, they would not admit within their gates. It would, probably, be difficult to find, on either continent, any region where the abuse of mineral waters is carried to a greater extreme, than is the case in some portions of the State of Mississippi--on the ground, very generally, that these waters are supposed to be 'Natures own remedy;" though on precisely the same principle, it would be competent to the house-wife to use poison hemlock instead of celery, or the natural white arsenic in the place of salt. 316. I shall give specially, in the Agricultural Report, the numerous localities at which mineral waters occur, and the analyses I have made; a few general remarks on their character ought, however, to find their place here. Sulphuretted hydrogen, and a certain amount of Carbonic Acid, are very generally present. An ingredient common to all the waters of the lignitic formation which I have examined, is common salt or Chloride of Sodium, Glaubers salt; or Sulphate of Soda, is also very common. Potash, in the form of Carbonate or Sulphate, is rarely wanting. But the universally prevalent characteristic of these waters, to which they most frequently owe their injurious effects on health by causeless and constant use, is Magnesia in some form-the Sulphate or Chloride, or both. Next to this, the salts of Lime-commonly the Sulphate, but often the Chloride; with more or less of the Bicarbonates of both Lime and Magnesia, form the usual ingredients. A trace of Iron is always present; in numerous instances, strong chalybeates are formed, both by the Bicarbonate, and by the Sulphate of that metal. Sulphate of Alumina, though not a usual ingredient, is often present, and in several cases forms 4317, 318] WATERS OF THE LIGNITIC FORMATION. 189 strong alum waters, mostly saturated, at the same time, with gypsum. These waters occur especially, wherever the Selenite is found accompanied by crusts of Yellow Iron Ore; which is more commonly the case near to the line of the marine fossiliferous strata, than at the more distant points. Very fre- quently, the waters of the lignitic formations contain organic matter, which imparts to them dark tints, and a variety of tastes, which are more particularly unpleasant in the presence of sulphuretted hydrogen. I have occasionally seen waters, whose color and smell could readily have caused them to be mistaken for the drainings of a manure-pile; and I have repeatedly heard waters of a similar character extolled by enthusiastic persons as particularly "healthy," on that very account. 317. It is not unfrequently the case, that mineral waters, especially chalybeates derived from the Orange Sand formation (and con- taining their iron as bicarbonate) are partially impregnated with the constituents of the lignitic waters, by contact with the strata, or intermixture of the waters themselves (175). Mineral waters thus produced are among the best of the State. In the absence of deep borings in the Northern Lignitic formation, I have been unable to settle definitely the question whether there is any constant dip of the strata, sufficient to afford a useful rise of water in deep wells. While it is highly probable that such is the case on the whole of the formation, it has been proved with certainty only near to, or on the territory of the marine Tertiary, in Madison and Hinds counties, where wells, although begun in the latter strata, yet obtain their rising waters from the Lignitic formation. Special data with reference to bores of this kind, will be found below (319, ff.) 318. In the Southern Lignitic, or Grand Gulf Group, also, data bearing on the question of the general dip are scarce. Several instances have been mentioned (239, 240) where the strata showed a strong dip for a short distance, but then again became horizontal, which is the position in which, apparently at least, they are usually seen. The fact that there is a general correspondence of the materials of this formation in an E. and W., or S. E. and N. W. direction, while there is a much greater variation at right angles to such lines, would seem to make a gencral dip south-westward probable. I know only one instance, however, in which a notable rise was obtained in a well dug in this formation, viz: at Mr. P. H. Hale's, S. 2, T. 3, R. 2 E., Rankin county, where at 86 feet, dug chiefly in soft, whitish sandstone, a stream of water was struck, rising 36 feet; the water impregnated, as usual (though not apparently, to an injurious extent), with different salts. This single instance might possibly be owing to one of the faults of stratification above referred to; yet in view of the fact that there are very few cases in which the strata of this formation have been penetrated to a similar depth, the hope of success in the boring of artesian wells is sufficiently justified to induce experiments. It is particularly so when it is remembered, that the water, such as it occurs in the water-bearing strata themselves, is often of good quality, and only becomes con- taminated with salts by standing in the wells. Hence, the continuous stream of an artesian fountain might be expected to be comparatively pure, even when the water of stagnant wells would be undrinkable. To the Southern River Counties, which in the absence of the Orange Sand, can obtain no drinkable water in shallow wells (that of the Bluff formation being too limy, and that of the Grand Gulf 190 [¶319, 320, 321 GEOLOGICAL REPORT. strata too magnesian and salty), this consideration is of especial importance, and well worth a trial; more especially as the boring is generally very easy. It is difficult, thus far, to say, to what depth boring might require to be carried; but a few hundred feet would suffice to show what might be expected within the Grand Gulf strata. So soon as, in passing through these (at Port Gibson, for instance, at a depth from 500 to 800 feet) the upper, sandy strata of the marine Tertiary (of the Vicksburg Group) should be reached, water would be obtained almost beyond a doubt; it would probably be somewhat limy, but much less so than that of the Bluff formation, and infinitely preferable to the magnesian waters in ordinary wells, of the Grand Gulf Group. It might be necessary, in order to prevent the strata of the latter from contaminating the water, to tube them out. The practicability of artesian wells further S., should no rise of water be obtained in the strata of the Grand Gulf Group, will be simply a question of depth; in this case, the first chances at Natchez, for instance, would lie between 1200 and 2000 feet; while at greater depths, the probability of obtaining artesian water would be a very strong one. But if, as is most likely, water having a considerable rise should be found within the Grand Gulf strata, the depth required might fall considerably short even of a thousand feet. .. 319. c. Waters of the calcareous marine Tertiary.-All these are, of course, more or less- impregnated with carbonate of lime; yet not generally to such a degree as to seriously impair their fitness for the ordinary household uses, nor even as strongly as those of the Rotten Limestone of the Cretaceous formation. On the territory of the Vicksburg Group, there is generally little difficulty in regard to water; the region is hilly and much interspersed with Orange Sand ridges, yielding pure water above the tertiary rocks; the latter themselves contain many water-bearing strata, especially in their upper portion; and the same is true of the lignitic stages intervening between the several calcareous ones. The waters derived from the latter are, in general, much purer than those originating from either of the two principal Lignitic groups.. 320. Within the Jackson Group, water-bearing strata are generally scarce, though not entirely absent. In commencing a bore on the territory of the Jackson Group, we must ordinarily expect to pass through their whole thickness before reaching water. Since, however, the dip of these strata is quite considerable, we may expect the water of deep wells to possess a corresponding rise; and from such experin ents as have been made, there can be little doubt that artesian wells are practicable on a considerable part, at least, of the territory of these formations; and especially on its eastern portion, at very moderate depths. 321. The boring of the well at the Penitentiary at Jackson, possesses great interest, not only for the adjoining country, but for the whole of South Mississipp; since it will give us definite infor- mation in regard to the general structure of the formations upon which the success of artesian boring will depend. I subjoin the record of the strata thus far penetrated in the Jackson well. T321] ARTESIAN WELLS IN HINDS-MADISON. 191 The data, down to No. 8 inclusive, were furnished by Mr. J. Murray,* after whose death the work remained stationary until, very lately, it has been recom- menced in a more effectual manner, by the aid of a steam engine, under the direction of Mr. W. B. Blake, who so successfully conducted the boring of the celebrated Louisville artesian well. Strata 9 to 13 are given according to Mr. Blake's accurate record; the greatest depth reached being, by his measurement, 460 feet. In consequence of the failure of the supply of water for the machinery at the Penitentiary, from the ponds heretofore used, the boring of the well has been discontinued at present (July, 1860), in order to allow of its water being used. It has since been reapeatedly drawn upon at the rate of 14,000 gallons per day, without a sensible diminution of the supply-saving about $18 per day (after deducting the cost of pumping), otherwise spent in hauling water. At present the water carries with it some fine sand, which renders it turbid, and is allowed to subside in a tank, before being fed to the boilers. This is owing, no doubt, to the spasmodic action of the pump, and would soon subside in a reg- ular flow. The water is now being used for all ordinary purposes; it is some- what mineral, the prevalent ingredient being Bi-carbonate of Soda, with some other salts-contained to the extent of about 20 to 25 grains per gallon. 1 Record of the Bored Well at the State Penitentiary. 1. Surface materials and clay marl 2. Blue sandy shell marl 3. Day sand, with streaks of whitish or gray clay, containing im- pressions of leaves 4. Wet quicksand, caving very badly (Here water rose to within 70 feet of the surface.) 5. Black clays, mostly laminated, interstratified with layers of sand. Fragments of impressions of leaves, and, at 400 feet, a catkin of a willow?, were bored up 6. Greensand, with shells, and streaks of gray and red clay 7. Water-bearing sand, caving badly (Here water rose to within 50 feet of the surface.) 8. Greensand, with shells; same as above 9. Ledge of gray, fossiliferous limestone 10. Blue clay, with calcareous nodules, and some layers of green- sand marl 11. Shell marl, with layers of black clay 20 feet 11 " 80 (6 70 re 268 པ་ 30" 20 ? 1 86 12 10 ፡፡ 12. Quicksand, with a great deal of mica 13. White, indurate clay, with iron pyrites. Not yet passed. g. any 5. " ? The material of bed No. 6 of this profile is richer in greensand than I have seen in the State; it consists of little else than glauconite and broken shells, and would be of the highest value as a manure, could its outcrop be found. I suppose it to be a continuation of the Shongalo bed; and if so, there is reason to expect, that materials similar to it will be found in other and more accessible portions of that bed. This profile shows the materials of the formation to be so variable, that water- bearing beds may be expected every where at intervals. The water, from which the fetid black clay had been "tubed out," showed no remarkable smell or taste. It will be perceived, that a difference in depth of 368 feet, from the top of the first water-bearing stratum (No. 4)to the second (No. 7) caused a rise of twenty feet; and if the rise increase hereafter at the same ratio, and a water-bearing *I must observe that the aggregate depth given by Mr. Murray (500 feet) greatly exceeds that since given by Mr. Blake, according to whose measurement, the entire depth, at the time he took the work in charge, did not exceed 425 feet.. Not knowing where the error may be, I give this part of the record as I received it, 192 T322, 323, 324 GEOLOGICAL REPORT. stratum be struck at the proper depth, the water will rise to the surface at a depth 920 feet below the present, or at a total depth of 1400 to 1500 feet. 322. The wells attempted, both at Canton, and at his residence, by Rev. J. R. Lambuth, of Madison, have already been mentioned; and from all appearance their failure has been owing purely to mechanical difficulties and accidents in boring, which the persons in charge did not know how to deal with. Three wells were attempted, successively, at Mr. Lambuth's residence, S. 2, T. 7, R. 2 E., two of which failed in consequence of caving, the last by the breaking of the auger. In all the phenomena were the same, as represented in the following record, in accordance with Mr. Lambuth's recollection: Record of wells bored by Rev. J. R. Lambuth, at his residence. 1. Surface materials, and bluish and yellowish clay marls (202, ff.) 2. Blue clay marl, poor in shells 3. Blue sandy shell marl, with well preserved shells 4. Dark colored, mostly bluish, laminated clays, interstratified with layers of sand 5. Hard, gray sandstone 6. Yellow, water-bearing sand [Here water rose to within 75 feet of the surface.] 7. Dark-colored, sandy clay, with crystals of gypsum 8. Hard, gray sandstone 9. Lignite, interstratified with layers of clay; above.it, a stream of water rising to within 45 feet of the surface (as far as penetrated) 40 feet 40 6 to 10 rr 185 to 190 66 1 inch 10 to 15 feet 80 to 85 ८८ 1 inch 40 feet Whole depth reached, about 415 feet Strata Nos. 1. 2 and 3 correspond, no doubt, to those of the McNutt Hills (T204, Sec. 29, Nos. 4, 5, 6 and 7,) and Nos. 2 and 3, with Nos. 1 and 2 of the Jackson well. A comparison of the lower strata, however, shows no strict cor- respondence, save in the general nature of the materials. It is observable also, that in Mr. Lambuth's well, the rise of the water is much more rapid, since a difference of only 100 feet in depth caused the water to rise 30 feet higher. This difference is probably caused by the different nature of the surface at the foun- tain head. : 323. In another well bored by Mr. Lambuth, at Canton, the phenomena were almost precisely the same, down to the first ledge of rock, on penetrating which, water rose to within 25 feet of the surface. Beneath the ledge, however, quick- sands kept filling in so fast that it became necessary to tube, in doing which the tube was so twisted and crushed as to render the task hopeless. It is not a little singular, that at a point ten miles further north, and near the edge of the formation generally dipping S. or S. W., the latter should be found of the same thickness and character-at a point which, according to the railroad levelings, must be between 80 and 100 feet higher than the town of Canton; while again, at Jackson, we find them at about the same absolute level as at Lambuth's, but rapidly dipping southward thence (200). 324. I know of no attempt at boring in this formation, between Jackson and N. Smith county. Here, the boring of a well was attempted under the auspices of Mr. A. P. Duke, of Montrose, on S. 34, T. 4, R. 10 È. No record having been kept, the data, as recollected by Mr. Duke, were some- what indefinite, yet sufficient for all practical purposes. Mr. D. states that at the place mentioned, on a hillside, the clay marl ("prairie") was struck at twelve feet, and continued with occasional changes from hard to soft and vice versa, to about 100 feet. Then the material grew harder, yet so that it could be slowly T325] ARTESIAN WELLS IN EAST MISSISSIPPI. 193 bored; its thickness was not recollected. After passing through, a " white shell rock" was struck, interstratified probably with sand, for water was obtain- ed in it which rose to within eight or ten feet of the surface. At about 175 feet, they struck a dark brown sand, which gradually grew lighter and finally white; then a coarse white sand. At this point, some of the material above began to cave, and they tried to pump the well, but after working twelve days in vain, it was abandoned. Once, however, the depth of 197 feet was reached. The water when first obtained, was clear and without any unpleasant taste and smell; but by standing in the bore, it has now acquired the taste of the “blue dirt.” It is evident that here, nothing but tubing was wanting for, the success of the artesian bore. At the level at which it stood, the water could even then have been made to run out into the valley; and had an additional stream, been struck after tubing out the quicksand, the water would doubtless have overflowed. Another attempt was made by Mr. Foley, about five miles S. E. of Garlands- ville; but he broke his auger at a moderate depth and abandoned the work : what his results were I could not learn. 325. These experiments prove conclusively, that deep bored wells, and artesian or flowing wells, arc quite as likely to succeed in the prairie region of the Tertiary, as they are on the waters of the Tombigbee; and the importance of this fact will be appre- ciated by those who are acquainted with the difficulty found heretofore in obtaining an adequate supply of drinkable water, in the region in question. For the tracts known as the "hog waliow" or "post oak prairie," in N. W. Jasper, N. E. Smith, and some parts of Scott and Newton, this circumstance is of the most vital importance, since they are utterly destitute of water during the greater part of the year. The nature of the strata does not admit of the existence of springs, and water cannot be obtained in dug wells at any reasonable depth. Not only the uplands of this region have been neglected, to a great extent, on account of this very difficulty, but even the profusely fertile bottoms of West Tallahala and Leaf River waters have experienced the same fate. The probable practicability of deep bored wells extends, of course, not only to the region of the calcareous Tertiary, but for some distance, at least, N. and S. of the same, and very probably to that of the Siliceous Claiborne Group (see map). R-13 ! ; THE QUATERNARY FORMATIONS. 326. The quaternary, or post-tertiary formations of Mississippi, seem to subdivide very naturally into five successive stages or periods, viz: Lowest, immediately overlying the latest Tertiary, the Orange Sand formation, corresponding, probably, to the drift of the Northern States. Next above, the Bluff formation of the Mis- sissippi River; a calcareous silt deposit containing, in Mississippi, chiefly or only terrestrial fossils. Succeeding this, we find the Yellow Loam deposits, which form the basis, as it were, of the agri- cultural wealth of the upland portion of the State. Still more modern are the Second Bottom or Hommock deposits, which, while they show a very obvious relation to the water-courses as at pres- ent existing, still must have required a state of things different from the present, to produce them; and latest of all are the Allu- vial deposits, whose formation is referable to causes still in action, including all the soils, first-bottom deposits, sand drifts, etc., now in progress of formation. I. THE ORANGE SAND FORMATION Has been treated of at the beginning of this volume, out of its proper geological order, for reasons there explained (¶5, ff.) II. THE BLUFF FORMATION. 327. The deposits of this formation, whose characters seem to be identical, in almost all respects, with those of the beds so named by Prof. Swallow, in Missouri, occupy a narrow belt, along the borders of the Mississippi Bottom in N. Mississippi, and along the river itself in the southern portion of the State. In the whole of this territory, so far as I am aware, it exhibits a remarkable uni- formity of character; consisting of a fine silt, almost too siliceous to be called a loam, of a grayish or yellowish buff tint; which effer- vesces throughout its mass in consequence of a certain percentage of the carbonates of lime and magnesia, and contains, besides, irregularly shaped, often tubular, concretions, from the size of sand- grains to the weight of several pounds, consisting of the carbonates just mentioned, with some of the silt intermixed. The whole mass is lightly cemented by these salts, so far as to impart to it a cer- tain degree of firmness, which it loses when once broken up. Al- though profiles of as much as seventy feet are sometimes seen, consisting altogether of this material, it is in most cases extremely difficult to find any definite marks of stratification, which I have T328, 329, 330¹] BLUFF FORMATION-FOSSILS. 195 observed only in a few places where the terraced form of slowly denuded hillsides showed the existence of a certain horizontal. structure. Wherever these beds occur associated with the Orange Sand stath, they overlie the latter; being in their turn as uniformly overlaid by the yellow or brown surface loam, which in the rest of the State, reposes directly upon the Orange Sand (¶332). The thickness of the Bluff formation is very variable, its materials having, apparently, filled up the valleys, resulting from denudation in the older formations-the Tertiary, and Orange Sand. Its fossils, so far as: known, are exclusively terrestrial. 328. In the Southern River Counties, below Vicksburg, the deposits of this formation are found on a belt ten to fifteen miles in width, running parallel, in general, to the Mississippi River; the surface is very much broken by deep and steep valleys and ravines, which always result from the denudation of these deposits. Intimately connected as these are with the agricultural features of this region, I shall refer the reader, for further details on the subject, to the description of the Southern River Counties, in the Agricultural portion of this Report. As to its region of occurrence north of Vicksburg, along the Missis-- sippi Bottom, I cannot speak from personal knowledge. It appears from scat- tered observations recorded in Harper's Report, that the silt of the Bluff forma- tion appears in patches or limited belts, along the border of the hills, from Satartia on the Yazoo to the Tennessee Line; not extending back into the inte- rior, for more than a few miles at most. The character of the deposit is described as being in all respects the same as that exhibited in the Southern River Coun- ties, save in that it is overlaid here by a yellow loam containing calcareous concretions; which is not the case below Vicksburg, where the loam (see anal- ysis under Southern River Counties, Agr. Rept.) contains no more lime than is necessary to constitute a good soil. Possibly this calcareous loam may be a dis- tinct facies of the Bluff formation itself, or the link of connection between it and the common brown surface loam, which is elsewhere wanting. 329. FOSSILS OF THE BLUFF FORMATION-These, as' has been mentioned, are altogether terrestrial, so far as ascertained. I have given but little atten-- tion to their study as yet; but the shells have been collected by Prof. Wailes, and studied by him; they, as well as the mammals, having received the atten-- tion of Conrad and Leidy, in part through specimens furnished by Prof. Wailes.. The snails occur singly, imbedded in loose silt, or not unfrequently, in the calcareous concretions above mentioned; at times they appear in bands or strings, disposed, however, without any apparent regard to stratification. Their sub- stance, although softer and more friable than in the living individuals, sometimes preserves the stripes or markings of the surface very distinctly. The bones, as well as the ivory of the Mastodon's tusks, are mostly soft and friable, having lost the greater part, or all of their organic substance; so that on drying they crumble or exfoliate, unless previously imbued with a solution of glue. It seems that these bones have in most cases been much scattered, so that they are generally found singly. Considerable portions of the skeleton have, however, been found together in spots where ponds would seem to have existed, as though the animal had perished there; and in such cases the bones are frequently in contact with considerable masses of black, fatty earth, which may reasonably be supposed to have resulted from the decomposition of the viscera, and other perishable animal matter. (Wailes). 3301 The snails all seem to belong to living species, though, according to Prof. Wailes, some of them are not at present living in the region where they occur in a fossil state. Among the specimens obtained, Prof. W. mentions the following (First Rept., p. 283): 196 [T3302, 381 GEOLOGICAL REPORT. Helix albolabris. CL alternata. (( concava. (2 elevata. "L fraterna. Helix perspectiva. " profunda. " thyroides. "L tridentata. To which I may add Helix monodon, and a large Achatina, found in Wilkin- son county. The following list of the mammals found in a solid blue clay, said to belong to this formation, was furnished to Prof. Wailes by Dr. Leidy: Felis atrox, LEIDY. Ursus Americanus, foss. Ursus amplidens, LEIDY. Megalonyx Jeffersonii, HARLAN. Megalonyx dissimilis, LEIDY. } Mylodon Harlani, Owen. Ereptodon priscus, LEIDY. Tapirus Americanus, foss. Tapirus Haysii, LEIDY. Equus Americanus, LEIDY. Bootherium cavifrons, LEIDY. Cervus Virginianus, foss. Bison latifrons, LEIDY. Elephas primigenius., Mastodon giganteus. Of these, the last named is by far the most common. The following localities are mentioned by Prof. Wailes: Bayou Sara; Pinkneyville, Wilkinson county; various localities in Adams county; near the former town of Greenville, Jef- ferson county; in Warren county, in the deep cut of the railroad at Vicksburg, and in the vicinity of Big Black River, near the east line of the county. In a ravine on Pine Ridge, Adams county, in TT. 7. and 8, R. 3 W., about six miles north of Natchez, these remains are very abundant. They are found about twenty feet below the surface, and the bones of other animals are here found associated with them; e. g. the Megalonyx, Tapirus Americanus, the fossil horse, and ox. (Wailes.), 330. USEFUL MATERIALS, AND WATERS OF THE BLUFF FORMA- TION.-The calcareous silt of this formation is often a marl properly speaking, when it contains a large amount of white specks of car- bonate of lime. Usually, its percentage of lime is too small to pay for its transportation to any distance, forming simply a cal- careous soil or subsoil; but on account of its general and conven- ient accessibility, and its highly beneficial effects on the brown loam soil, it may often be mixed with the latter to great advantage. An analysis of this material, and other specialities concerning the same, will be found in the Agricultural Report. Small, local deposits of a soft limestone or tufa are sometimes formed by the highly calcareous waters of this formation. The rock is generally of a yellow- ish tint, very porous, and occurs in irregular masses, in which shapes resembling icicles, or stalactites, are frequently seen. Sticks, leaves, etc., may sometimes be found imbedded in it, while the cavities are usually filled with soil. These deposits may be looked for in the heads of hollows, or in the beds of branches, wherever the water drips, in the Cane Hill region; but their extent, as before observed, is too limited to render them of any great practical importance; they lie on the surface and do not extend into the mass of the formation. The impure lime which might be burnt from this material, would be applicable 'mainly to agricultural purposes.-The largest deposit of this kind which I have seen, occurs on Mr. J. C. Humphrey's land, near Port Gibson. 3312: Owing to the great uniformity of the material of this form- ation, springs are very scarce on the territory occupied by it, except where it is underlaid at the proper elevation by impervious clay or sandstone strata of the Grand Gulf Group. The water issuing from the calcareous silt is very "hard," of a flattish taste, 1332, 333] YELLOW LOAM. 197 and contains the bicarbonates of lime and magnesia to such an extent, as to be disagreeably perceptible even in the streams of the region. For this reason, cisterns, or wells deep enough to pene- trate the Grand Gulf strata, are very generally preferred to the natural waters. It is questionable, however, whether even these are not preferable, as far as health is concerned, to many of the strongly saline and magnesian waters sometimes found in deep wells, which contain the sulphates and chlorides, instead of the carbonates, of the above earths (T316). III. THE YELLOW LOAM DEPOSITS. 332. The yellow, brown, or reddish loams, which have been repeatedly mentioned as forming the surface, and therefore, essentially, the soils of the greater portion of the State of Mississippi, constitute, to all appearance, an independent aqueous deposit, posterior to the Orange Sand and Bluff formation, and anterior to the alluvial formations of the present epoch. The great thickness which this loam stratum attains in some regions, its distinct definition, as well as its comparative independence, as to its char- acter, of the formations immediately underlying, preclude its being claimed as a mere surface disintegration of the older formations. The nature of its materials, and the entire absence of stratification lines distinguish it sufficiently from the Orange Sand, where it immediately overlies the latter; while the absence of any large amount of lime (except where it is in immediate contact with strongly calcareous formations), the presence of a considerable amount of hydrated peroxide of Iron, as well as the want of proper fossils, as distinctly separate it from the Bluff formation of the Mississippi River. I have stated that it is to some extent independent as to its character, of the underlying formations; i. e. it is not so uniformly dependent upon them as to allow of its being considered (as has been attempted) as a mere surface disinteg- ration, in loco, in the absence of a more general distributive agency, than those which we find at work at the present time. Yet nevertheless, there is a very obvious general correspondence of variation in character, between the older for- mations and the surface loam, more especially so where the stratum of the latter is thin; a circumstance which cannot fail to force itself upon the atten- tion of every one in the study of the soils of the State. In view of the intimate connection existing between the latter and the loam stratum, I shall leave the special description of its variations in different districts, for the Agricultural portion of the present Report, where these will necessarily be mentioned; and will only give in this place some generalities concerning its geological relations. 333. From the appearance of the loam stratum even on high ridges and elevated uplands, it is obvious that its deposition took place, in part at least, anterior to the great denudations which have produced the present surface configuration; nevertheless, its increasing thickness as we approach the imme- diate valley of the Mississippi, shows, as in the case of the Bluff formation, that this great channel was already in existence. On the Tombigbee, and on the lower Tallahatchie, Yallabusha, and Big Black, a similar increase in the thick- ness of the loam stratum may be observed. But on the smaller watercourse, this is the case only to a very limited extent, showing that although at the time 198 ¶334, 335, 336 GEOLOGICAL REPORT. : of the deposition of this loam, the larger channels were already more or less im- pressed upon the surface, and high ridges existed which remained above the level of the water which deposited the loam the minor denudations which have caused the present undulating surface, had as yet exerted but little influence. The lines of contact between the Orange Sand and loam, where the latter is decidedly in situ, are generally much less undulating, than are those between the Orange Sand and the older formations. 334. Under the present configuration of the surface, however, we find precisely the same stratigraphical relations to exist between the Orange Sand and the loam stratum, as those which we see between the latter and the calca- reous silt of the Bluff formation, as exemplified in Diagram No. 6 (see "Southern River Counties"); that is to say, the loam has to a great extent been removed from the level hilltops or plateaux where it was originally deposited, to the hillsides and valleys, leaving the higher portions of the ridges more thinly covered or altogether bare. The same agencies which are at work at present, carrying away the arable soils from our uplands, will explain the hillside posi- tion in which, in the more hilly uplands of Mississippi, this loam is prevalently found at the present time; while, whenever extensive level or slightly undula- ting tracts exist, it may be seen to rest conformably upon the Orange Sand strata. 335. Its prevalent character in what I have termed the Yellow Loam Region of the State, is that of a mellow clay or loam, without any definite structure or cleavage, variously tinged with iron; containing from 10 to 25 per cent., usually, of siliceous sand, the rest being clay mixed with finely divided silex, and forming, therefore, rather loose, mellow soils, and good brick-clays. It almost invariably contains some irregular whitish veins of sand, especially in its lower portions, where it overlies the Orange Sand; and sometimes, but not most frequently, passes into the materials of the latter by degrees of transition, through a sandy "hardpan," which in some localities attains a considerable thickness (10 to 15 feet) and may correspond to the "altered drift" of Prof. Swallow (Report of the Geological Survey of Missouri, p. 76). Where, how- ever, the loam overlies clayey strata, it becomes heavier as we proceed down- wards; and if they be rich in lime, this ingredient is also found in increased quantity in its lower layers. In the latter case, the fair yellow or brown color of the loam almost invariably acquires a greenish hue, even where full exposure to the atmosphere places a reduction of the peroxide to the protoxide out of question. Such is very generally the case in the prairie regions of the State, whose loam stratum (overlying the Rotten Limestone in the cretaceous, and sometimes the clay marls of the tertiary region), I believe to be essentially contemporaneous with that of the hills, since, so far as comparable, its geological