Rudiments of GeologyW. and R. Chambers, 1845 - 222 páginas |
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Página 5
... OLD RED SANDSTONE SYSTEM , Classification of Fossil Fishes , CLAY - SLATE , GRAUWACKE , AND SILURIAN SYSTEMS , WARE & MOD OON JERN KIT 53 56 59 59 62 64 66 70 72 75 81 91 98 CARBONIFEROUS SYSTEM , Mountain Limestone , Coal Measures , •
... OLD RED SANDSTONE SYSTEM , Classification of Fossil Fishes , CLAY - SLATE , GRAUWACKE , AND SILURIAN SYSTEMS , WARE & MOD OON JERN KIT 53 56 59 59 62 64 66 70 72 75 81 91 98 CARBONIFEROUS SYSTEM , Mountain Limestone , Coal Measures , •
Página 7
... clay , and a third with gravel . How were these materials formed , whence were they de- rived , and by what agency were they laid down in their present position ? Again , shells and bones may be found in the sand and clay , plants and ...
... clay , and a third with gravel . How were these materials formed , whence were they de- rived , and by what agency were they laid down in their present position ? Again , shells and bones may be found in the sand and clay , plants and ...
Página 9
... clay , now far removed from waters , and to the various rocks which are found at great depths in the earth's crust , it is the object of geology to discover whether they are to be ascribed to the operation of forces similar in kind ...
... clay , now far removed from waters , and to the various rocks which are found at great depths in the earth's crust , it is the object of geology to discover whether they are to be ascribed to the operation of forces similar in kind ...
Página 21
... clay , sand , gravel , animal and vegetable matter ; but if left at rest , these by their own weight soon fall to the bottom . Such substances are said to be mechanically suspended ; and , when deposited at the bot- tom , they form ...
... clay , sand , gravel , animal and vegetable matter ; but if left at rest , these by their own weight soon fall to the bottom . Such substances are said to be mechanically suspended ; and , when deposited at the bot- tom , they form ...
Página 24
... clay , gravel , and boulder stones , some of which are many tons in weight . PROPORTION OF LAND AND SEA . The proportion of land to sea is , accurately , as 266 to 734. If , therefore , the whole superficies of the globe be taken at ...
... clay , gravel , and boulder stones , some of which are many tons in weight . PROPORTION OF LAND AND SEA . The proportion of land to sea is , accurately , as 266 to 734. If , therefore , the whole superficies of the globe be taken at ...
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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...