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 6-10 de 67
Página 19
... coral - sand which is so largely formed in the neighbourhood of coral - reefs . In these cases the rock is composed of fragments of the skeletons of shell- fish , and numerous other marine animals , together , in many instances , with ...
... coral - sand which is so largely formed in the neighbourhood of coral - reefs . In these cases the rock is composed of fragments of the skeletons of shell- fish , and numerous other marine animals , together , in many instances , with ...
Página 21
... corals , and an immense number of other animals , are enabled to construct their skeletons ; whilst some plants form hard structures within their tissues in a precisely similar manner . We do meet with some calcareous deposits , such as ...
... corals , and an immense number of other animals , are enabled to construct their skeletons ; whilst some plants form hard structures within their tissues in a precisely similar manner . We do meet with some calcareous deposits , such as ...
Página 24
... corals , and well known to every one under the name of " coral - reefs . " Such reefs are often of vast extent , both superficially and in vertical thickness , and they fully equal in this respect any of the coralline limestones of ...
... corals , and well known to every one under the name of " coral - reefs . " Such reefs are often of vast extent , both superficially and in vertical thickness , and they fully equal in this respect any of the coralline limestones of ...
Página 25
... Corals , and the Foraminifera . At the pre- sent day , the Crinoids have been nearly extinguished , and the few ... coral - reef , by the fact that we find in it great masses of coral , growing in their natural posi- tion , and ...
... Corals , and the Foraminifera . At the pre- sent day , the Crinoids have been nearly extinguished , and the few ... coral - reef , by the fact that we find in it great masses of coral , growing in their natural posi- tion , and ...
Página 26
... corals . This is precisely paralleled by what we can observe in our existing coral - reefs . Parts of the modern coral - islands and coral - reefs are really made up of corals , dead or alive , which actually grew on the spot where we ...
... corals . This is precisely paralleled by what we can observe in our existing coral - reefs . Parts of the modern coral - islands and coral - reefs are really made up of corals , dead or alive , which actually grew on the spot where we ...
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...