Class-book of GeologyMacmillan and Company, 1890 - 516 páginas |
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Página 8
... known by what a long succession of changes the Earth has reached its present state . An outline of what science has accom- plished in this task will form the last and concluding part of this book . In the following chapters I wish two ...
... known by what a long succession of changes the Earth has reached its present state . An outline of what science has accom- plished in this task will form the last and concluding part of this book . In the following chapters I wish two ...
Página 14
... known . Marble tombstones in the graveyards of large towns , for example , hardly keep their inscriptions legible for even so long as a century . Before that time , the surface of the stone has crumbled away into a kind of sand ...
... known . Marble tombstones in the graveyards of large towns , for example , hardly keep their inscriptions legible for even so long as a century . Before that time , the surface of the stone has crumbled away into a kind of sand ...
Página 19
... known as a Talus ( Fig . 4 ) . In mountainous or hilly regions , where rocky precipices rise high into the air , there gather at their feet and down their clefts long trails or screes of loose blocks that have been split off from them ...
... known as a Talus ( Fig . 4 ) . In mountainous or hilly regions , where rocky precipices rise high into the air , there gather at their feet and down their clefts long trails or screes of loose blocks that have been split off from them ...
Página 20
Archibald Geikie. arise thick accumulations of what is known as rain - wash - soil mixed often with angular fragments of still undecomposed rock , and not infrequently forming a kind of brick - earth ( Fig . 5 ) . Deposits of this nature ...
Archibald Geikie. arise thick accumulations of what is known as rain - wash - soil mixed often with angular fragments of still undecomposed rock , and not infrequently forming a kind of brick - earth ( Fig . 5 ) . Deposits of this nature ...
Página 29
... known as water - worn . The loose stones lying in the channel of a stream , and the solid rocks as high up as floods can scour them , present this characteristic aspect . Here and there , where a few stones have been caught in an eddy ...
... known as water - worn . The loose stones lying in the channel of a stream , and the solid rocks as high up as floods can scour them , present this characteristic aspect . Here and there , where a few stones have been caught in an eddy ...
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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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