Class-book of GeologyMacmillan and Company, 1890 - 516 páginas |
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Página 131
... species of felspar which , differing much from each other in chemical composition , agree in crystallising in the same type or system , which is that of a triclinic or oblique rhomboidal prism . abundant ingredients of rocks they ...
... species of felspar which , differing much from each other in chemical composition , agree in crystallising in the same type or system , which is that of a triclinic or oblique rhomboidal prism . abundant ingredients of rocks they ...
Página 132
... species commonly crystallise in fine needles or silky tufts . The zeolites have obviously been formed from the decomposition of other minerals , particularly felspars . They are especially abundant in the steam - cells of old lavas in ...
... species commonly crystallise in fine needles or silky tufts . The zeolites have obviously been formed from the decomposition of other minerals , particularly felspars . They are especially abundant in the steam - cells of old lavas in ...
Página 154
... species , that the volcanoes were probably submarine ( pp . 101-103 ) . Agglomerate- —a coarse , usually unstratified accumulation of blocks of lava and other rocks , not infrequently filling up the chimney or neck of a volcanic vent ...
... species , that the volcanoes were probably submarine ( pp . 101-103 ) . Agglomerate- —a coarse , usually unstratified accumulation of blocks of lava and other rocks , not infrequently filling up the chimney or neck of a volcanic vent ...
Página 161
... species , as to be Layers of stone , full of the coprolites ( fossil excrement ) or of the rolled bones of various vertebrate animals , have , in recent years , been largely worked as sources of phosphate of lime for the manufacture of ...
... species , as to be Layers of stone , full of the coprolites ( fossil excrement ) or of the rolled bones of various vertebrate animals , have , in recent years , been largely worked as sources of phosphate of lime for the manufacture of ...
Página 219
... species as are now living , and the characteristic climate of which is known , or upon assemblages of plants or animals which may be compared with corresponding assemblages now living . We may be tolerably confident that the existing ...
... species as are now living , and the characteristic climate of which is known , or upon assemblages of plants or animals which may be compared with corresponding assemblages now living . We may be tolerably confident that the existing ...
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Términos y frases comunes
abundant accumulated acid Ammonites ancient Assistant Master beds BOOK bottom Brachiopods calcareous calcite Cambrian Cambridge carbonate of lime Carboniferous Chapter chiefly clay College containing corals Cretaceous crinoids crystalline crystals decay deposits detritus Devonian earth earth's crust Edited ELEMENTARY Eocene eruptive Europe evidence example extinct fauna Fcap feet fissures fossils genera GEOGRAPHY geological history glacier globe gradually granite gravel GREEK ground Illustrated Jurassic kinds known lakes land lava layers limestone living lower marine marls mass materials Mesozoic mineral Miocene mountains natural occur Old Red Sandstone organic remains original Palæozoic Paleozoic period Permian plants and animals Pliocene present preserved Prof Professor quartz Red Sandstone regions revised rivers rocks sand schists sediment sedimentary sedimentary rocks shales sheets shells siliceous Silurian soil solid sometimes species stone strata structure substance surface terrestrial Tertiary thick trace Triassic upper various vegetation volcanic
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