Siluria: the history of the oldest known rocks containing organic remains |
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Common terms and phrases
animals Atrypa auriferous band Barrande beds Bohemia brachiopods Britain British calcareous Caradoc Caradoc sandstone carboniferous rocks chiefly coal coal-fields conglomerates contain corals crustacean crystalline deposits described detected Devonian Devonian rocks district eruptive exhibited field figured find first fish fishes flagstones flank forms Foss fossiliferous fossils genera genus Geol geological geologists gold Goniatites granite graptolites greywacke grit Hills igneous rocks Journ Lingula Llandeilo Llandeilo formation Lond Longmynd Lower Silurian Lower Silurian rocks lowest M‘Coy masses mineral North Wales numerous occur Old Red Sandstone older organic remains Orthidae Orthis Orthoceratites overlying palaeozoic Pentamerus Permian Phacops plants portion primeval Professor Sedgwick Quart region Rhenish Russia Russia in Europe Salter schists Scotland shale shells Shropshire Silurian fossils Silurian strata Silurian System slates slaty species Spirifer stone strata Strophomena Syst thickness tracts trilobites Upper Silurian rocks Ural Mountains Verneuil Wenlock shale whilst woodcut