Handbook of Geological Terms and Geology

abundantly according acid alumina ANIMAL SCHEME arrangement augite beds belonging bivalves bones calcareous called carbonate Carboniferous Chalk formation characterised chiefly clay coal Coal-measures colour compact composed consists contradistinction copper corals crust crustaceans crystalline crystals deposits Devonian earth Eocene extinct familiar term feet felspar fishes fissures fossil frequently fresh-water genera genus geological geologists gneiss granite granular Greensand heat hence the name hornblende igneous iron known Lias lignite lime limestone lithos Lower lustre magnesia manganese marine marls masses metallic mica mineral Miocene name given numerous occurring odous Old Red Sandstone Oolite organic oxide Paleozoic peculiar Permian peroxide plants plates protoxide quartz Red Sandstone reptiles resemblance rocks salt sand schists shales shells silica Silurian soda soft species stems stone strata structure substance sulphate sulphur sulphuret surface teeth term applied Tertiary texture thick tion Triassic Upper usually variety vegetable veins vertebræ volcanic Wealden