id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
40404	Norton, William Harmon	The Elements of Geology			.txt	text/plain	125192	6893	73	with each geological process the land forms and the rock structures rocks to form a land surface, and, last of all, the carving of a forms not only on waste produced in place from the rock beneath, but valleys cut this surface permanent streams are formed, the water ground water through the rocks that even during long droughts large =Caves.= In massive limestone rocks, ground water dissolves channels =Desert streams.= In arid regions the ground-water surface lies so low or later their waters find way to the rock floor of the valley and ice sheets and valley glaciers drag on large quantities of rock waste ancient sea deposits now raised to form the dry land. the case of limestones, recent sea deposits uplifted to form land are of coarse waste, and thick offshore deposits of sand and gravel (Fig. 156) record the high elevation of the bordering land. The rocks of these series are shallow-water deposits and reach the	./cache/40404.txt	./txt/40404.txt