The Ancient Life-history of the Earth: A Comprehensive Outline of the Principles and Leading Facts of Palæontological ScienceD. Appleton & Company, 1878 - 407 páginas |
Dentro del libro
Resultados 1-5 de 80
Página 10
... abundance , in the great majority of rocks ; and they are not only of great interest in themselves , but they have proved of the greatest importance as throwing light upon vari- ous difficult problems in geology , in natural history ...
... abundance , in the great majority of rocks ; and they are not only of great interest in themselves , but they have proved of the greatest importance as throwing light upon vari- ous difficult problems in geology , in natural history ...
Página 28
... the head of a small pin or less up to the size of a pea , and which may be in almost immediate contact with one another , or may be cemented together by a 66 more or less abundant calcareous matrix . When the 28 PRINCIPLES OF PALEONTOLOGY .
... the head of a small pin or less up to the size of a pea , and which may be in almost immediate contact with one another , or may be cemented together by a 66 more or less abundant calcareous matrix . When the 28 PRINCIPLES OF PALEONTOLOGY .
Página 29
... abundant calcareous matrix . When the grains are pretty nearly spherical and are in tolerably close contact , the rock looks very like the roe of a fish , and the name of " oolite " or egg - stone " is in allusion to this . When the ...
... abundant calcareous matrix . When the grains are pretty nearly spherical and are in tolerably close contact , the rock looks very like the roe of a fish , and the name of " oolite " or egg - stone " is in allusion to this . When the ...
Página 30
... abundantly in some later rock- groups , whilst it occurs abundantly in the form of nodules in parts of the Cretaceous ( Upper Greensand ) and Tertiary deposits . Phosphate of lime forms the larger proportion of the earthy matters of the ...
... abundantly in some later rock- groups , whilst it occurs abundantly in the form of nodules in parts of the Cretaceous ( Upper Greensand ) and Tertiary deposits . Phosphate of lime forms the larger proportion of the earthy matters of the ...
Página 31
... abundantly in the shales of the Carboniferous series and in other argillaceous deposits ; and a parallel modern example is to be found in the nodules of manganese , which were found by Sir Wyville Thomson , in the Challenger , to be so ...
... abundantly in the shales of the Carboniferous series and in other argillaceous deposits ; and a parallel modern example is to be found in the nodules of manganese , which were found by Sir Wyville Thomson , in the Challenger , to be so ...
Otras ediciones - Ver todas
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
Pasajes populares
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...