Class-book of GeologyMacmillan and Company, 1890 - 516 páginas |
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Página xv
... action of a peaty stream , Dur- ness , Sutherlandshire . 8. Pot - holes worn out by the gyration of stones in the bed of a stream 9. Grand Cañon of the Colorado 10. Gullies torn out of the side of a mountain by descending torrents ...
... action of a peaty stream , Dur- ness , Sutherlandshire . 8. Pot - holes worn out by the gyration of stones in the bed of a stream 9. Grand Cañon of the Colorado 10. Gullies torn out of the side of a mountain by descending torrents ...
Página xviii
... action 110. Map of Dykes near Muirkirk , Ayrshire 205 207 III . Section of a volcanic neck 208 112. Section of a mineral vein . 209 113. Common Cockle ( Cardium edule ) 216 114. Fragment of crumpled Schist 234 115. A , Fucoid - like ...
... action 110. Map of Dykes near Muirkirk , Ayrshire 205 207 III . Section of a volcanic neck 208 112. Section of a mineral vein . 209 113. Common Cockle ( Cardium edule ) 216 114. Fragment of crumpled Schist 234 115. A , Fucoid - like ...
Página 13
... action are rapidly disintegrated . The rock called shale ( see p . 153 ) is peculiarly liable to decay from this cause . The cliffs into which it sometimes rises show at their base long trails of rubbish entirely derived from its waste ...
... action are rapidly disintegrated . The rock called shale ( see p . 153 ) is peculiarly liable to decay from this cause . The cliffs into which it sometimes rises show at their base long trails of rubbish entirely derived from its waste ...
Página 18
... of the earthworm , the scarcely appreciable removal of material from the surface by the action of rain and wind , and the equally insensible descent of the crumbling subsoil farther and farther into 18 CHAP . GEOLOGICAL WORK OF THE AIR.
... of the earthworm , the scarcely appreciable removal of material from the surface by the action of rain and wind , and the equally insensible descent of the crumbling subsoil farther and farther into 18 CHAP . GEOLOGICAL WORK OF THE AIR.
Página 20
... action of wind , above referred to , a vast amount of fine dust and sand is carried up into the air and strewn far and wide over the land . In dry FIG . 5. - Section of rain - wash countries , such as large tracts of Central or brick ...
... action of wind , above referred to , a vast amount of fine dust and sand is carried up into the air and strewn far and wide over the land . In dry FIG . 5. - Section of rain - wash countries , such as large tracts of Central or brick ...
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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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