The Ice Age in North America, and Its Bearings Upon the Antiquity of Man: With an Appendix on "The Probable Cause of Glaciation, by Warren UphamD. Appleton, 1889 - 622 pàgines |
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The Ice Age in North America, and Its Bearings Upon the Antiquity of Man George Frederick Wright,Warren Upham Visualització completa - 1889 |
The Ice Age in North America, and Its Bearings Upon the Antiquity of Man George Frederick Wright,Warren Upham Visualització completa - 1889 |
The Ice Age in North America, and Its Bearings Upon the Antiquity of Man George Frederick Wright Visualització completa - 1889 |
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Passatges populars
Pàgina 101 - ... two magnificent ranges of mountains, whose lofty peaks, perfectly covered with eternal snow, rose to elevations varying from seven to ten thousand feet above the level of the ocean. The glaciers that filled their intervening valleys, and which descended from near the mountain summits, projected in many places several miles into the sea, and terminated in lofty perpendicular cliffs. In a few places the rocks broke through their icy covering, by which alone we could be assured that land formed...
Pàgina 34 - The ice in general had a semi-stratified appearance, as if it still retained the horizontal plane in which it originally congealed. The surface was always soiled by dirty water from the earth above. This dirt was, however, merely superficial.
Pàgina 605 - Outlines of a Mechanical Theory of Storms, containing the true [?] law of lunar influence, with practical...
Pàgina 113 - Parrsborough, and that the icy blocks, heaped on each other, and frozen together or ' packed,' at the foot of Cape Blomidon, were often fifteen feet thick, and were pushed along when the tide rose, over the sandstone ledges. He also stated that fragments of the
Pàgina 502 - The general structure of the mass is neither that of ordinary boulder clay nor of stratified gravels, such as are formed by the complete rearrangement by water of the elements of simple drift deposits. It is made up of boulders, pebbles, and sand, varying in size from masses containing one hundred cubic feet or more to the finest sand of the ordinary sea-beaches.
Pàgina 605 - T^HE GREAT ICE AGE, and its Relation to the Antiquity •* of Man. By JAMES GEIKIE, FRSE, of HM Geological Survey of Scotland.
Pàgina 373 - ... probability when we claim not a few of them as the originals of present species. Remains of the same plants have been found fossil in our temperate region, as well as in Europe. Here, then, we have reached a fair answer to the question how the same or similar species of our trees came to be so dispersed over such widely separated continents.
Pàgina 566 - SOUTHALL.— THE EPOCH OF THE MAMMOTH AND THE APPARITION OF MAN UPON EARTH. By James C. Southall, AM. LL.D. Crown 8vo, pp. xii. and 430, cloth. Illustrated. 1878. 10s. 6d. SOUTHALL. —THE RECENT ORIGIN OF MAN, as illustrated by Geology and the Modern Science of Prehistoric Archaeology.
Pàgina 99 - The lofty mountains boldly rise to a height of between three and four thousand feet. They are covered by a wide mantle of perpetual snow, and numerous cascades pour their waters through the woods, into the narrow channel below. In many parts, magnificent glaciers extend from the mountain side to the water's edge. It is scarcely possible to imagine anything more beautiful than the beryl-like blue of these glaciers, and especially as contrasted with the dead white of the upper expanse of snow.
Pàgina 85 - Imagine now the centre of such a continent, occupied through nearly its whole extent by a deep unbroken sea of ice, that gathers perennial increase from the water-shed of vast snow-covered mountains, and all the precipitations of the atmosphere upon its own surface.