Rudiments of GeologyW. and R. Chambers, 1845 - 222 páginas |
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Página 9
... formation , the aid of chemistry must be called in ; to describe and classify the remains of plants and animals , he must have recourse to botany and zoology ; while , generally speaking , there are many of his problems , for the ...
... formation , the aid of chemistry must be called in ; to describe and classify the remains of plants and animals , he must have recourse to botany and zoology ; while , generally speaking , there are many of his problems , for the ...
Página 26
... tracts of sand found along the sea - coast- known in Scotland as links , and as downs in England - owe their surface formation to wind . The sand collected in bays and creeks by the waves and tides of the ocean 26 GEOLOGY .
... tracts of sand found along the sea - coast- known in Scotland as links , and as downs in England - owe their surface formation to wind . The sand collected in bays and creeks by the waves and tides of the ocean 26 GEOLOGY .
Página 27
... formation of avalanches ; and in northern latitudes the iceberg is one of its familiar pro- ductions . The action of frost in crumbling down a rocky surface seems slow and insignificant , but when we look upon the avalanche carrying ...
... formation of avalanches ; and in northern latitudes the iceberg is one of its familiar pro- ductions . The action of frost in crumbling down a rocky surface seems slow and insignificant , but when we look upon the avalanche carrying ...
Página 28
... formation of metallic veins , and similar phenomena , geology has not been able to determine . We know that the hardest and most untractable substances in nature can be artificially dissolved and reconstructed by the aid of electricity ...
... formation of metallic veins , and similar phenomena , geology has not been able to determine . We know that the hardest and most untractable substances in nature can be artificially dissolved and reconstructed by the aid of electricity ...
Página 30
... formation of many soils is owing to this pulver- ising power of the atmosphere ; and as their loose matter is washed down by rains and rivers , a new supply is formed by further disintegration of the rocks beneath . We have no means of ...
... formation of many soils is owing to this pulver- ising power of the atmosphere ; and as their loose matter is washed down by rains and rivers , a new supply is formed by further disintegration of the rocks beneath . We have no means of ...
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Términos y frases comunes
abundant accumulations agency ammonite ancient appearance argillaceous basalt beds bituminous bones boulders calcareous carbonate carboniferous chalk character chiefly clay clay-slate coal measures coast colour composed composition contain coral crustacea crystalline debris deposits depth derived districts dry land earth elevated England estuaries evidence existing extensive feet felspar fishes fissures formation fossils fragments fresh-water genera geologists geology gigantic globe gneiss granite grauwacke gravel heat hornblende igneous rocks islands lakes layers less lias lignite lime lower magnesian limestone marine marls mass material matter mica mica schist miles mineral mountain limestone nature numerous occupied occur ocean old red sandstone oolite organic remains origin pebbles peculiar period petrifaction plants and animals present produced quartz reefs reptiles rivers sand schist Scotland shales shells shores silt Silurian soil species specimens stone strata stratified structure subterranean surface terraces terrestrial tertiary strata texture thickness tion trees upper valleys vegetable volcanic wealden zoophytes
Pasajes populares
Página 185 - ... invisible. These animals are of a great variety of shapes and sizes, and in such prodigious numbers, that, in a short time, the whole surface of the rock appears to be alive and in motion. The most common...
Página 88 - With regard to the atmosphere, also, we infer, that had it differed materially from its actual condition, it might have so far affected the rays of light that a corresponding difference from the eyes of existing Crustaceans would have been found in the organs on which the impressions of such rays were then received. Regarding light itself, also, we learn, from the resemblance of these most ancient...
Página 185 - ... the tide reaches every day, it is found to be full of worms of different lengths and colours, some being as fine as a thread, and several feet long, of a bright yellow, and sometimes of a blue colour.
Página 192 - Part of the bed of the sea, says Mrs. Graham, remained bare and dry at high water, " with beds of oysters, muscles, and other shells, adhering to the rocks on which they grew, the fish being all dead, and exhaling most offensive effluvia...
Página 185 - The growth of coral appears to cease when the worm is no longer exposed to the washing of the sea. Thus, a reef rises in the form of a cauliflower, till its top has gained the level of the highest tides, above which the worm has no power to advance, and the reef of course no longer extends itself upwards.
Página 243 - Edinburgh," on the Vertical Position and Convolutions of certain Strata, and their relations with Granite, broached that theory of lateral pressure applied by some unknown force outside the area of the foldings themselves, which is still regarded as the best yet originated on...