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 vi
... characteristic fossils of each successive period , a general account is given of their more important zoological characters and their relations to living forms ; but the technical language of Zoology has been avoided , and the aid of ...
... characteristic fossils of each successive period , a general account is given of their more important zoological characters and their relations to living forms ; but the technical language of Zoology has been avoided , and the aid of ...
Página xv
... characteristic Cambrian fossils , 33. Fragment of Dictyonema sociale , 34. Generalised section of the Lower Silurian rocks of Wales , 30 35. Generalised section of the Lower Silurian rocks 33 * w w ∞ of North America , 36. Licrophycus ...
... characteristic Cambrian fossils , 33. Fragment of Dictyonema sociale , 34. Generalised section of the Lower Silurian rocks of Wales , 30 35. Generalised section of the Lower Silurian rocks 33 * w w ∞ of North America , 36. Licrophycus ...
Página 13
... characteristic of coniferous wood . ( Original . ) posed of the original carbonaceous matter of the wood , is now converted into flint . The only explanation that can be given of this by no means rare phenomenon , is that. THE SCOPE OF ...
... characteristic of coniferous wood . ( Original . ) posed of the original carbonaceous matter of the wood , is now converted into flint . The only explanation that can be given of this by no means rare phenomenon , is that. THE SCOPE OF ...
Página 38
... characteristic of any given formation , re- presents the life of the particular period in which the formation was deposited . In this way the past history of the earth . becomes divided into a series of successive life - periods , each ...
... characteristic of any given formation , re- presents the life of the particular period in which the formation was deposited . In this way the past history of the earth . becomes divided into a series of successive life - periods , each ...
Página 39
... characteristic of the Lower Silurian , may at some future time be found to have survived into the Upper Silurian period . We should not forget , therefore , in determining the age of strata by palæonto- logical evidence , that we are ...
... characteristic of the Lower Silurian , may at some future time be found to have survived into the Upper Silurian period . We should not forget , therefore , in determining the age of strata by palæonto- logical evidence , that we are ...
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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...