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 28
... singular forms in con- sequence of what is called " concretionary action . " Examina- tion with the microscope shows that these limestones are composed of an aggregate of minute but perfectly distinct crystals , but that minute ...
... singular forms in con- sequence of what is called " concretionary action . " Examina- tion with the microscope shows that these limestones are composed of an aggregate of minute but perfectly distinct crystals , but that minute ...
Página 31
... singular power of determining the precipitation around it of mineral salts dis- solved in water . Thus , when any animal bodies are undergo- ing decay at the bottom of the sea , they have a tendency to cause the precipitation from the ...
... singular power of determining the precipitation around it of mineral salts dis- solved in water . Thus , when any animal bodies are undergo- ing decay at the bottom of the sea , they have a tendency to cause the precipitation from the ...
Página 75
... singular rounded bodies which he has dis- covered in the Laurentian limestones , and which he believes to be casts of the shells of Foraminifera possibly somewhat allied to the existing Globigerina . The same eminent palæon- tologist ...
... singular rounded bodies which he has dis- covered in the Laurentian limestones , and which he believes to be casts of the shells of Foraminifera possibly somewhat allied to the existing Globigerina . The same eminent palæon- tologist ...
Página 80
... however , that the vege- table origin of these singular bodies has been satisfactorily proved . Lastly , there are found in certain green and purple beds of Lower Cambrian age at Bray Head , Wicklow 80 HISTORICAL PALEONTOLOGY .
... however , that the vege- table origin of these singular bodies has been satisfactorily proved . Lastly , there are found in certain green and purple beds of Lower Cambrian age at Bray Head , Wicklow 80 HISTORICAL PALEONTOLOGY .
Página 88
... singular in possessing a shell which is of a horny texture , and contains but a small proportion of calcareous matter . In the Upper Cambrian Rocks , the Lingulella become much more abundant , the broad satchel - shaped species known as ...
... singular in possessing a shell which is of a horny texture , and contains but a small proportion of calcareous matter . In the Upper Cambrian Rocks , the Lingulella become much more abundant , the broad satchel - shaped species known as ...
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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...