Class-book of GeologyMacmillan and Company, 1890 - 516 páginas |
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Página 3
... gravels and sands from which rudely - fashioned human implements of flint have been obtained . Whence we further learn that , before the civilised metal - using people appeared , an earlier race had been there , which employed weapons ...
... gravels and sands from which rudely - fashioned human implements of flint have been obtained . Whence we further learn that , before the civilised metal - using people appeared , an earlier race had been there , which employed weapons ...
Página 4
... gravel , full of smooth well - rounded stones . .Such materials are to be seen in the course of formation where water keeps them moving to and fro , as on the beds of rivers , the margins of lakes , or the shores of the sea . Wherever ...
... gravel , full of smooth well - rounded stones . .Such materials are to be seen in the course of formation where water keeps them moving to and fro , as on the beds of rivers , the margins of lakes , or the shores of the sea . Wherever ...
Página 5
... gravel , of oyster - shells , of peat and of marl , would have told us nothing as to ancient geography had we not been able to ascertain their origin and history by finding corresponding materials now in course of accumulation . To one ...
... gravel , of oyster - shells , of peat and of marl , would have told us nothing as to ancient geography had we not been able to ascertain their origin and history by finding corresponding materials now in course of accumulation . To one ...
Página 20
... Gravel with seams of sand . everything . After many centuries , a de- posit , which may be hundreds of feet deep , is thus accumulated on the surface of the land . Some of the ancient cities of the Old World , Nineveh and Babylon for ...
... Gravel with seams of sand . everything . After many centuries , a de- posit , which may be hundreds of feet deep , is thus accumulated on the surface of the land . Some of the ancient cities of the Old World , Nineveh and Babylon for ...
Página 26
... gravel , and blocks of stone lying in its channel , and to keep these materials moving until , as the declivity lessens and the rain ceases , the current becomes too feeble to do more than lazily carry onward the fine silt that ...
... gravel , and blocks of stone lying in its channel , and to keep these materials moving until , as the declivity lessens and the rain ceases , the current becomes too feeble to do more than lazily carry onward the fine silt that ...
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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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