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 26
... referable to the Foraminifera . In other cases , the matrix is more or less crystalline , and when this crystallisa- tion has been carried to a great extent , the original organic nature of the rock may be greatly or completely obscured ...
... referable to the Foraminifera . In other cases , the matrix is more or less crystalline , and when this crystallisa- tion has been carried to a great extent , the original organic nature of the rock may be greatly or completely obscured ...
Página 66
... referable to the Upper Laurentian . In other localities in Great Britain ( as in St David's , South Wales ; the Malvern Hills ; and the North of Ireland ) occur ancient metamorphic deposits which also are probably refer- able to the ...
... referable to the Upper Laurentian . In other localities in Great Britain ( as in St David's , South Wales ; the Malvern Hills ; and the North of Ireland ) occur ancient metamorphic deposits which also are probably refer- able to the ...
Página 76
... referable to the Huronian , certain problematical limpet - shaped fossils , to which he gave the name of Aspidella . LITERATURE . Amongst the works and memoirs which the student may consult with regard to the Laurentian and Huronian ...
... referable to the Huronian , certain problematical limpet - shaped fossils , to which he gave the name of Aspidella . LITERATURE . Amongst the works and memoirs which the student may consult with regard to the Laurentian and Huronian ...
Página 77
... referable to the genus Lingula . These are followed by 1000 feet of dark shales and flaggy sandstones , which are known as the " Tremadoc slates , " from their occurrence near Tremadoc in North Wales ; and these in turn are surmounted ...
... referable to the genus Lingula . These are followed by 1000 feet of dark shales and flaggy sandstones , which are known as the " Tremadoc slates , " from their occurrence near Tremadoc in North Wales ; and these in turn are surmounted ...
Página 80
... referable to the tracks and burrows of marine worms . The first - mentioned of these formations has also yielded the curious , furrowed and striated stems which have been described as a kind of land - plant under the name of Eophyton ...
... referable to the tracks and burrows of marine worms . The first - mentioned of these formations has also yielded the curious , furrowed and striated stems which have been described as a kind of land - plant under the name of Eophyton ...
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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...