Advanced Text-book of Geology, Descriptive and Industrial

abundant accumulations agency argillaceous arrangement aspect augite basalt beds bituminous bones calcareous carbonate carboniferous chalk chemical chiefly clay clay-slate coal coal-measures colour compact composed composition compounds conglomerates corals crust crustacea crystalline deposits depth Devonian distinct districts drift earth elevation encrinites eocene epoch eruptive estuaries existing feet felspar fishes fissures formation forms fossil genera geological geologists globe gneiss granite gravel greenstone groups heat hence hornblende igneous rocks known lakes laminated land lava layers less lime limestone lower magnesian limestone marine marls mass matter metamorphic mica mineral nature numerous occur ocean old red sandstone oolite organic origin paleontologist peculiar period Permian phenomena plants and animals pliocene porphyry present quartz regions remains reptiles rivers rocky sand schists shales shells siliceous Silurian slates species stone strata stratified structure student surface temperature term tertiary texture thickness tion trappean Triassic upper variety vegetable volcanic