Class-book of GeologyMacmillan, 1896 - 404 páginas |
Dentro del libro
Página 1
... many acres of fertile land under a covering of barren sand and shingle . A long - continued , heavy rain , by loosening masses E B of earth or rock on steep slopes , causes destructive. ΤΟ. ΛΙΝΩ. CHAPTER I INTRODUCTORY I.
... many acres of fertile land under a covering of barren sand and shingle . A long - continued , heavy rain , by loosening masses E B of earth or rock on steep slopes , causes destructive. ΤΟ. ΛΙΝΩ. CHAPTER I INTRODUCTORY I.
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... sand and silt ashore so as to increase the breadth of the dry land . These are ordinary everyday causes of alteration , and though singly insignificant enough , their united effect after long centuries cannot but be great . From time to ...
... sand and silt ashore so as to increase the breadth of the dry land . These are ordinary everyday causes of alteration , and though singly insignificant enough , their united effect after long centuries cannot but be great . From time to ...
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... sand and 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 ...
... sand and 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 ...
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... sand and 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 ...
... sand and 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 ...
Página 13
... sand and earth are separated from each other by the ice that shoots between them . They are all frozen into a solid mass that rings like stone under our feet ; but , as soon as a thaw sets in , the ice that formed the binding cement ...
... sand and earth are separated from each other by the ice that shoots between them . They are all frozen into a solid mass that rings like stone under our feet ; but , as soon as a thaw sets in , the ice that formed the binding cement ...
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Términos y frases comunes
abundant abundantly accumulated acid Ammonites basin beds bones bottom Brachiopods calcareous calcite Cambrian carbonate of lime Carboniferous Chapter characteristic chiefly clay containing corals Cretaceous crinoids crystalline crystals decay deposits detritus Devonian earth earth's crust Eocene eruptive rocks Europe evidence extinct fauna feet thick felspar fishes fissures formations fossils genera geological history geologist glacier globe gneiss gradually granite gravel ground iron Jurassic kinds known lakes land lava layers limestone living lower marine marls mass materials Mesozoic miles Miocene molten mountains natural North occur Old Red Sandstone organic remains original Palæozoic period Permian plants and animals Pliocene present preserved probably quartz rain regions represented rivers sand schists sea-floor sediment sedimentary rocks shales sheets shells siliceous Silurian slopes soil solid sometimes species stone strata stratified stream structure substance surface terrestrial Tertiary trace Triassic Trilobites upper valley various vegetation vent volcanic