The Ancient Life-history of the Earth: A Comprehensive Outline of the Principles and Leading Facts of Palæontological ScienceD. Appleton & Company, 1878 - 407 páginas |
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Página 5
... present widely - increased knowledge , the series of geological monuments remains a broken and imperfect one ; nor can we ever hope to fill up completely the numerous gaps with which the geological record is defaced . Catastrophism was ...
... present widely - increased knowledge , the series of geological monuments remains a broken and imperfect one ; nor can we ever hope to fill up completely the numerous gaps with which the geological record is defaced . Catastrophism was ...
Página 6
... present state is really the result of the tranquil and regulated action of known forces through unnumbered and innumerable centuries . The most important point for us , in the present connection , is the bearing of these opposing ...
... present state is really the result of the tranquil and regulated action of known forces through unnumbered and innumerable centuries . The most important point for us , in the present connection , is the bearing of these opposing ...
Página 7
... present theatres of terrestrial life . " Geology , then , teaches us that the physical features which now distinguish the earth's surface have been produced as the ultimate result of an almost endless succession of precedent changes ...
... present theatres of terrestrial life . " Geology , then , teaches us that the physical features which now distinguish the earth's surface have been produced as the ultimate result of an almost endless succession of precedent changes ...
Página 8
... present condition of the globe ; and we know that these forces are capable of producing the vastest of the changes which geology brings under our consideration , provided we assign a time proportionately vast for their operation . On ...
... present condition of the globe ; and we know that these forces are capable of producing the vastest of the changes which geology brings under our consideration , provided we assign a time proportionately vast for their operation . On ...
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... present with the greatest accuracy the external form , and even some- times the internal minute structure , of the ... presents the rings of growth and fibrous structure of recent wood , and which under the micro- scope exhibits the ...
... present with the greatest accuracy the external form , and even some- times the internal minute structure , of the ... presents the rings of growth and fibrous structure of recent wood , and which under the micro- scope exhibits the ...
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Términos y frases comunes
abundant allied Amongst ancient animals attain beds belong Birds Bivalves bones bony Brachiopods Britain calcareous Cambrian carbonate Carboniferous Chalk characteristic clays coal Coal-measures composed consists contain Corals Cretaceous Crinoids Crustaceans Cycads deposits Devonian Elephants Eocene Europe existing species extinct genus feet fishes Foraminifera formation forms fossils Ganoids genera genus Geol geological gigantic Glacial Graptolites Greensand horny Journ Jurassic known Lastly Laurentian less Lias lime limestones living Lower Silurian Mammals marine Mesozoic Miocene Mollusca natural North America numerous occur Old Red Sandstone Oolitic organic origin Owen Palæontographical Society Paleozoic period Permian plants plates Pliocene portion possessed Post-Pliocene present day principal Pterosaurs Quadrupeds regarded represented Reptiles resembling Rhinoceros rocks sands shales shell singular siphuncle skeleton skull Slates strata structure surface tail teeth Tertiary thickness tion tooth Trias Triassic Trilobites types Univalves Upper Miocene Upper Silurian vertebræ whilst yielded the remains
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Página 244 - Ichthyosaurus to cut through the waves. May it not therefore be concluded (since, in addition to these circumstances, its respiration must have required frequent access of air), that it swam upon or near the surface, arching back its long neck like a swan, and occasionally darting it down at the fish which happened to float within its reach.
Página 366 - Description of the skeleton of an extinct gigantic sloth, Mylodon robustus, Owen, with observations on the osteology, natural affinities, and probable habits of the megatherioid quadrupeds in general, London, 4to., 176 pp., 24 pis., 1842.
Página 363 - Eagles, owls, and gulls pursue their prey along the sea-coast; ptarmigan run in troops amongst the bushes; little snipes are busy along the brooks, and in the morasses; the social crows seek the neighbourhood of men's habitations ; and, when the sun shines in spring, one may even sometimes hear the cheerful note of the finch, and in autumn, that of the thrush...
Página 291 - ... formation occupies a middle place in the Eocene series, we are struck with the comparatively modern date to which some of the greatest revolutions in the physical geography of Europe, Asia, and northern Africa must be referred. All the mountain chains, such as the Alps, Pyrenees, Carpathians, and Himalayas, into the composition of whose central and loftiest parts the nummulitic strata enter bodily, could have had no existence till after the middle Eocene period."— Manual, p. 232. A still more...