Class-book of GeologyMacmillan and Company, 1890 - 516 páginas |
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Página 2
... feet in a year . Here and there , on the other hand , they cast 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 ...
... feet in a year . Here and there , on the other hand , they cast 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 ...
Página 3
... feet below the level of the present streets , mosaic pavements and foundations , together with earthen vessels , bronze implements , ornaments , coins , and other relics of Roman time . Now , if we knew nothing , from actual authentic ...
... feet below the level of the present streets , mosaic pavements and foundations , together with earthen vessels , bronze implements , ornaments , coins , and other relics of Roman time . Now , if we knew nothing , from actual authentic ...
Página 13
... 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 , breaks up the materials of the soil , and ...
... 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 , breaks up the materials of the soil , and ...
Página 18
... feet high and visible for a distance of several miles ; likewise tunnels and chambers , which it plasters all over the stems and branches of trees , often so continuously that hardly any bark can be seen . The fine soil thus exposed is ...
... feet high and visible for a distance of several miles ; likewise tunnels and chambers , which it plasters all over the stems and branches of trees , often so continuously that hardly any bark can be seen . The fine soil thus exposed is ...
Página 19
... feet , we should be ready to recognise in the soil of former ages a similar chronicle of quiet atmospheric dis- integration . Talus . Besides soil and subsoil , there are other forms in which decomposed rock accumulates on the surface ...
... feet , we should be ready to recognise in the soil of former ages a similar chronicle of quiet atmospheric dis- integration . Talus . Besides soil and subsoil , there are other forms in which decomposed rock accumulates on the surface ...
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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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