Class-book of GeologyMacmillan and Company, 1890 - 516 páginas |
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Página 19
... upper parts of the soil to lower levels . Hence arise thick accumulations of what is known as rain -. FIG . 4. - Talus - slopes at the foot of a line of cliffs . FIG . 6. - Sand - dunes . FIG . II 19 TALUS - SLOPES , RAIN - WASH.
... upper parts of the soil to lower levels . Hence arise thick accumulations of what is known as rain -. FIG . 4. - Talus - slopes at the foot of a line of cliffs . FIG . 6. - Sand - dunes . FIG . II 19 TALUS - SLOPES , RAIN - WASH.
Página 20
... thick with a fine 4. Brick - earth . 3. yellow dust which may entirely obscure the White sand . 2. Brick - earth , sun at mid - day , and which settles over I. Gravel with seams of sand . everything . After many centuries , a de- posit ...
... thick with a fine 4. Brick - earth . 3. yellow dust which may entirely obscure the White sand . 2. Brick - earth , sun at mid - day , and which settles over I. Gravel with seams of sand . everything . After many centuries , a de- posit ...
Página 22
... thick in the air as to obscure the noonday sun . But in none of these forms can the accumulation of decomposed material be regarded as permanent . So long as it is exposed to the influences of the atmosphere , this material is still ...
... thick in the air as to obscure the noonday sun . But in none of these forms can the accumulation of decomposed material be regarded as permanent . So long as it is exposed to the influences of the atmosphere , this material is still ...
Página 32
... thick extending right round the whole globe at the equator . Still more gigantic are the gorges or cañons of the Colorado and its tributaries in Western America . The Grand Cañon of the Colorado is 300 miles long , and in some places ...
... thick extending right round the whole globe at the equator . Still more gigantic are the gorges or cañons of the Colorado and its tributaries in Western America . The Grand Cañon of the Colorado is 300 miles long , and in some places ...
Página 35
... thick and many miles in diameter . The valleys in a range of mountains afford many striking examples of these alluvial cones or fans , as they are called . Where the tributary torrents are numerous , a succession of such cones or. FIG ...
... thick and many miles in diameter . The valleys in a range of mountains afford many striking examples of these alluvial cones or fans , as they are called . Where the tributary torrents are numerous , a succession of such cones or. FIG ...
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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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