Introductory Text-book of Geology

abundant accumulations ADVANCED TEXT-BOOK agency arrangement basalt beds bones boulders calcareous Cambrian carboniferous chalk chemical clays coal coal-measures coloured compact composed composition coral-reefs corals cretaceous Crown 8vo crust crustacea crystalline cycads deinotherium deposits districts drift earth Edition elevated England eocene epoch estuaries existing feet felspar fishes formation forms fossils fresh-water geologists Geology gigantic globe gneiss granite gravel greensand greenstone grits groups igneous rocks islands lakes laminated Laurentian lava layers lignite lime limestone lower magnesian marine marls masses Metamorphic mica mica-schist mineral MIOCENE mountain limestone North America numerous occur ocean Old Red Sandstone oolite origin peat-mosses peculiar period Permian PHYSICAL GEOGRAPHY plants and animals pleistocene PLIOCENE post-tertiary present quartz regions remains reptiles rivers rocky sand schists Scotland sea and land sedimentary shales shells shores silicious silt Silurian slates slaty species stone strata structure submerged surface termed tertiary thickness tion Triassic upheavals upper valleys vegetable volcanic wealden