Class-book of GeologyMacmillan and Company, 1890 - 516 páginas |
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Página 7
... planet , noting how each variety of rock occupies its own characteristic place , and how they are all grouped and braced together in the solid framework of the land . in this volume . This then I 7 GEOLOGICAL RECORDS.
... planet , noting how each variety of rock occupies its own characteristic place , and how they are all grouped and braced together in the solid framework of the land . in this volume . This then I 7 GEOLOGICAL RECORDS.
Página 13
... solid mass that rings like stone under our feet ; but , as soon as a thaw sets in , the ice that formed the binding cement passes into water which converts the soil into soft earth or mud . This process , repeated winter after winter ...
... solid mass that rings like stone under our feet ; but , as soon as a thaw sets in , the ice that formed the binding cement passes into water which converts the soil into soft earth or mud . This process , repeated winter after winter ...
Página 15
... solid sandstone ( a ) under- neath up into broken - up sandstone ( b ) , b and thence into the earthy layer ( c ) that supports the vegetation of the surface . Traced from below upwards , the rock is found to become more and more broken ...
... solid sandstone ( a ) under- neath up into broken - up sandstone ( b ) , b and thence into the earthy layer ( c ) that supports the vegetation of the surface . Traced from below upwards , the rock is found to become more and more broken ...
Página 17
... solid rock below . Influences are at work also , whereby there is an imper- ceptible removal of material from the surface of the soil . Notable among these influences are Rain , Wind , and Earthworms . These may Wherever soil is bare of ...
... solid rock below . Influences are at work also , whereby there is an imper- ceptible removal of material from the surface of the soil . Notable among these influences are Rain , Wind , and Earthworms . These may Wherever soil is bare of ...
Página 19
Archibald Geikie. insensible descent of the crumbling subsoil farther and farther into the solid stone below . Having learnt how all this is told by the soil beneath our feet , we should be ready to recognise in the soil of former ages a ...
Archibald Geikie. insensible descent of the crumbling subsoil farther and farther into the solid stone below . Having learnt how all this is told by the soil beneath our feet , we should be ready to recognise in the soil of former ages a ...
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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 molten mountains natural occur Old Red Sandstone organic remains original Palæozoic 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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