The Ice Age in North America: And Its Bearings Upon the Antiquity of ManBibliotheca sacra Company, 1911 - 763 pagina's |
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Overige edities - Alles bekijken
The Ice Age in North America: And Its Bearings Upon the Antiquity of Man George Frederick Wright Volledige weergave - 1911 |
The Ice Age in North America: And Its Bearings Upon the Antiquity of Man George Frederick Wright Volledige weergave - 1911 |
Veelvoorkomende woorden en zinsdelen
accumulation Alaska American Geologist American Journal amount basin border bowlders channel coast continuous covered Creek depth distance drainage drift drumlins east eastern elevation erosion evidence extending facts farther feet high fiords flow formed Fort Snelling front Geological Society Geological Survey Geologist glacial boundary glacial deposits Glacial epoch Glacial period glaciated area glaciated region gorge gravel Greenland height hills hundred feet ibid Ice age ice-front ice-sheet icebergs implements inlet island Journal of Geology Journal of Science kames kettle-holes Lake Agassiz Lake Erie land latitude loess lower Malaspina Glacier mass material melting miles Minnesota Mississippi mountains movement Muir Glacier Muir Inlet Niagara Niagara gorge northern numerous Ohio Ohio River pebbles Pleistocene portion preglacial present Professor Report ridges River rock rocky sand shore side slope southern subglacial stream summit surface terminal moraine terraces theory thickness tion upper valley vicinity
Populaire passages
Pagina 498 - 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.
Pagina 103 - ... 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...
Pagina 84 - ... increase from the watershed of vast snow-covered mountains and all the precipitations of the atmosphere upon its own surface. Imagine this moving onward like a great glacial river, seeking outlets at every fiord and valley, rolling icy cataracts into the Atlantic and Greenland Seas ; and having at last reached the northern limit of the land that has borne it up, pouring out a mighty frozen torrent into unknown Arctic space.
Pagina 330 - Seen from some dominant point, such an assemblage of kames, as they are called, look like a tumbled sea, the ground now swelling into long undulations, now rising suddenly into beautiful peaks and cones, and anon curving up in sharp ridges, that often wheel suddenly round so as to enclose a lakelet of bright, clear water.
Pagina 85 - I have named after the Advance. From one of these rugged islets, the nearest to the glacier which could be approached with any thing like safety, I could see another island larger and closer in shore, already half covered by the encroaching face of the glacier, and great masses of ice still detaching themselves and splintering as they fell upon that portion which protruded. Repose was not the characteristic of this seemingly solid mass; every feature indicated activity, energy, movement.
Pagina 117 - 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
Pagina 346 - On the Surface Geology of the Basin of the Great Lakes and the Valley of the Mississippi.
Pagina 697 - ... before the close of the glacial period. We can henceforth speak with confidence of interglacial man in Ohio. It is facts like these which give archaeological significance to the present fruitful inquiries concerning the date of the glacial epoch in North America. When the age of the moundbuilders of Ohio is reckoned by centuries, that of the glacial man who chipped these palaeolithic implements must be reckoned by thousands of years.
Pagina 421 - ... 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.
Pagina 32 - 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.