id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
41840	Loomis, Justin R. (Justin Rudolph)	The Elements of Geology; Adapted to the Use of Schools and Colleges			.txt	text/plain	47613	3060	68	SECTION III.--THE MINERAL MASSES WHICH FORM THE CRUST OF THE EARTH. SECTION III.--THE MINERAL MASSES WHICH FORM THE CRUST OF THE EARTH. _Limestone_ is a very abundant rock, and occurs in many different forms. Granite is found to penetrate the stratified rocks in the form of veins. rocks, and have evidently been formed like granite, by solidifying from The volcanic rocks consist of materials ejected from volcanoes. remnants of lava-currents, as they have formed a very imperishable rock, existed on the earth at the time when these rocks were deposited. elevation of a large area of the bed of the sea, the existing mountains, others, it consists of the surface rock in a state of disintegration; Some limestone formations of great extent among the older rocks were the existing rocks of each period, towards the formation of the strata of a Beds of vegetable matter, with a great thickness of rock deposited above	./cache/41840.txt	./txt/41840.txt