Introductory Text-book of GeologyBlackwood, 1873 - 220 páginas |
Términos y frases comunes
abundant accumulations ADVANCED TEXT-BOOK argillaceous arranged basalt beds bituminous boulders calcareous Cambrian carboniferous chalk chemical chiefly clay-slate clays coal coal-measures coloured compact composed composition conglomerates coral-reefs corals cretaceous Crown 8vo crust crustacea crystalline deposits Devonian districts drift earth Edition encrinites England eocene epoch estuaries existing felspar fishes flagstones formation forms fossils fresh-water geologists Geology globe gneiss granite gravel Greensand greenstone grits groups igneous rocks interstratified islands lakes laminated land Laurentian lava layers lias lignite lime lower magnesian marine marls masses Mesozoic metamorphic mica mica-schist mineral miocene mountain limestone numerous occur ocean Old Red Sandstone oolite origin PALEOZOIC peculiar period Permian PHYSICAL GEOGRAPHY plants and animals Pliocene POST-TERTIARY present quartz remains of plants reptiles rivers rocky sand schists Scotland seas sedimentary shales shell-fish shells shores silicious silt Silurian slates slaty species stone strata stratified rocks structure term tertiary texture thickness tion Triassic upper variety vegetable veins volcanic Wealden
Pasajes populares
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