Class-book of GeologyMacmillan and Company, 1890 - 516 páginas |
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Página 2
... mile or more from the modern shore . Elsewhere the land has gained upon the sea , and the harbours of an earlier time are now several miles distant from the coast - line . But man has naturally kept note only of the more impressive ...
... mile or more from the modern shore . Elsewhere the land has gained upon the sea , and the harbours of an earlier time are now several miles distant from the coast - line . But man has naturally kept note only of the more impressive ...
Página 18
... 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 liable to be blown away by the wind or washed ...
... 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 liable to be blown away by the wind or washed ...
Página 20
... miles broad , bordering the sea . The particles of sand are driven inland by the wind , and the dunes gradually bury fields , roads , and villages , unless their progress is arrested by the growth of vegetation over their shifting ...
... miles broad , bordering the sea . The particles of sand are driven inland by the wind , and the dunes gradually bury fields , roads , and villages , unless their progress is arrested by the growth of vegetation over their shifting ...
Página 26
... mile , which is estimated to be equal to the lowering of the general surface to the extent of 18 of an inch from each square mile in a century , or one foot in 13,200 years . Mechanical Action— ( 1 ) Transport . - The dissolved material ...
... mile , which is estimated to be equal to the lowering of the general surface to the extent of 18 of an inch from each square mile in a century , or one foot in 13,200 years . Mechanical Action— ( 1 ) Transport . - The dissolved material ...
Página 27
... mile or I in 6336. The Durance is , there- fore , rather a torrent than a river . With this rapidity of descent is conjoined an excessive capacity for transporting sediment . In floods of exceptional severity , the proportion of mud in ...
... mile or I in 6336. The Durance is , there- fore , rather a torrent than a river . With this rapidity of descent is conjoined an excessive capacity for transporting sediment . In floods of exceptional severity , the proportion of mud in ...
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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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