Class-book of GeologyMacmillan and Company, 1890 - 516 páginas |
Dentro del libro
Página xv
... river - shingle , showing the direction of the current that transported and left them 12. Section of alluvium showing direction of currents 13. River - terraces · 14. Alluvial terraces on the side of an emptied reservoir 15. Parallel ...
... river - shingle , showing the direction of the current that transported and left them 12. Section of alluvium showing direction of currents 13. River - terraces · 14. Alluvial terraces on the side of an emptied reservoir 15. Parallel ...
Página 1
... rivers which , through unknown ages , have never ceased to flow seawards . So stead- fast do these features appear ... river will in a few hours cut away large slices from its banks , and spreading over fields and meadows , will ...
... rivers which , through unknown ages , have never ceased to flow seawards . So stead- fast do these features appear ... river will in a few hours cut away large slices from its banks , and spreading over fields and meadows , will ...
Página 4
... rivers , the margins of lakes , or the shores of the sea . Wherever smoothed rolled pebbles occur , they point to the influence of moving water ; so that we conclude , even though the site is now dry land , that the sand and gravel ...
... rivers , the margins of lakes , or the shores of the sea . Wherever smoothed rolled pebbles occur , they point to the influence of moving water ; so that we conclude , even though the site is now dry land , that the sand and gravel ...
Página 6
... rivers have altered their courses , how lakes have been filled up , how valleys have been excavated , how mountains , peaks , and precipices have been carved , how plains have been spread out , and how the story of these revolutions has ...
... rivers have altered their courses , how lakes have been filled up , how valleys have been excavated , how mountains , peaks , and precipices have been carved , how plains have been spread out , and how the story of these revolutions has ...
Página 8
... rivers and lakes , and to the shores of the sea . We can hardly take any country walk , indeed , in which with duly observant eye we may not detect either some geological operation in actual progress , or the evidence of one which was ...
... rivers and lakes , and to the shores of the sea . We can hardly take any country walk , indeed , in which with duly observant eye we may not detect either some geological operation in actual progress , or the evidence of one which was ...
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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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