Class-book of GeologyMacmillan and Company, 1890 - 516 páginas |
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Página 2
... regions of the globe , the ground is often convulsed by earth- quakes , many of which leave permanent scars upon the surface of the land . Volcanoes , too , in many countries pour forth streams of molten rock and showers of dust and ...
... regions of the globe , the ground is often convulsed by earth- quakes , many of which leave permanent scars upon the surface of the land . Volcanoes , too , in many countries pour forth streams of molten rock and showers of dust and ...
Página 4
... regions , lie layers of oysters and other sea - shells . These remains , spread out like similar shells on the beach or bed of the sea at the present day , enable us to infer that where they lie the sea once rolled . Pits , quarries ...
... regions , lie layers of oysters and other sea - shells . These remains , spread out like similar shells on the beach or bed of the sea at the present day , enable us to infer that where they lie the sea once rolled . Pits , quarries ...
Página 18
... regions where it accumulates , the quiet fall of rain , the gradual rotting away of the upper part of the underlying rock , the growth and decay of a long succession of generations of plants , the ceaseless labours of the earthworm ...
... regions where it accumulates , the quiet fall of rain , the gradual rotting away of the upper part of the underlying rock , the growth and decay of a long succession of generations of plants , the ceaseless labours of the earthworm ...
Página 19
... 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 by the weather . Such slopes , especially where they are ...
... 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 by the weather . Such slopes , especially where they are ...
Página 20
... regions where , as in Britain , there is a large annual rainfall , seasons of drought occur , during which there may be a considerable drifting of the finer particles of soil by the wind . We probably hardly realise how much the soil ...
... regions where , as in Britain , there is a large annual rainfall , seasons of drought occur , during which there may be a considerable drifting of the finer particles of soil by the wind . We probably hardly realise how much the soil ...
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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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