Rudiments of GeologyW. and R. Chambers, 1845 - 222 páginas |
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Página 11
... ancient , onta , beings , logos , a discourse ) —a discourse or reasoning about ancient beings . Both of these terms are used by geologists to signify the science of fossil remains ; some objecting to oryctology as merely referring to ...
... ancient , onta , beings , logos , a discourse ) —a discourse or reasoning about ancient beings . Both of these terms are used by geologists to signify the science of fossil remains ; some objecting to oryctology as merely referring to ...
Página 36
... ancient world ; but , judging from the extent of sedimentary rocks , they must have been much more gigantic than most of those now existing . 64. Waves , currents , and tides , are also powerful geological agents . Waves are continually ...
... ancient world ; but , judging from the extent of sedimentary rocks , they must have been much more gigantic than most of those now existing . 64. Waves , currents , and tides , are also powerful geological agents . Waves are continually ...
Página 40
... ancient ranges , we may arrive at some idea of the enormous power exerted by igneous forces in the earlier ages of the world . During an eruption of Ætna , a space around the mountain , 150 miles in circumference , was covered with a ...
... ancient ranges , we may arrive at some idea of the enormous power exerted by igneous forces in the earlier ages of the world . During an eruption of Ætna , a space around the mountain , 150 miles in circumference , was covered with a ...
Página 42
... ancient beaches have been found in various parts of the world , at elevations from 8 to 60 feet , clearly showing that changes in the relative level of sea and land have often taken place over vast areas , but affording little evidence ...
... ancient beaches have been found in various parts of the world , at elevations from 8 to 60 feet , clearly showing that changes in the relative level of sea and land have often taken place over vast areas , but affording little evidence ...
Página 43
... ancient elevations and depressions have been accomplished in one hour or in many years , whether quietly or with violence , geologists have not yet been able to determine . EXPLANATORY NOTE . VOLCANO , from Vulcan , the god of fire ...
... ancient elevations and depressions have been accomplished in one hour or in many years , whether quietly or with violence , geologists have not yet been able to determine . EXPLANATORY NOTE . VOLCANO , from Vulcan , the god of fire ...
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Rudiments of Geology: For Use in Schools and for Private Instruction ... David Page Sin vista previa disponible - 2018 |
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...