Papers on the Quaternary in New England: Including the Glacial and Fluvial Phenomena, Or the Drift, and Terraces

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Tuttle, Morehouse & Taylor, Printers, 1884 - Geology - 277 pages
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Page 477 - Very irregular, short ridges, mounds, and enclosed hollows resulted from deposition among irregular masses of ice. The glacial rivers which we have described appear to have flowed in channels upon the surface of the ice, and the formation of the kames took place at or near their mouths, extending along the valley as fast as
Page 228 - ... direct evidence of the submergence of the land required for an iceberg sea over New England fails, the conclusion appears inevitable that icebergs had nothing to do with the drift of the New Haven region, in the Connecticut Valley; and, therefore, that the Glacial era in central New England was a Glacier era.
Page 245 - Maine, the scratches in sixty -two have a southeasterly course ; that the southeasterly course of the glacial grooves and striae is especially marked in the interior of the State on the high lands and low mountains ; but, approaching the coast, the evidence shows that the glaciers moved down the river valleys, and thus assumed a more north-and-south course, and at times, owing to local trends in the depressions, were even deflected so as to flow in a direction a few degrees west of south. The facts...
Page 459 - These conditions insure such accumulations of snow above the line of perpetual frost as will sooner or later pass the line of perpetual snow and be changed to ice and water. The water becomes glacial rivers, and the ice will move as a plastic mass to a line determined by the amount of snow, on the one hand, and the climate on the other. The advancing movement of the glacier is accompanied by erosion and scratching of the rocks below and by the different kinds of moraines, as till or blue bowlder...
Page 460 - ... eastern ice-fields is to be sought in the Canadian highlands. Against this opinion several important reasons may be urged. First, in the portions of Canada in which the glaciers in question are supposed to have originated, we have reason to believe that the rocks are rounded and scratched, phenomena everywhere recognized as glacial ; but I think in no case characterizing rocks known to have been covered with perpetual snow. Again, the elevation and extent of the highest portions of Canada are...
Page 461 - Canada. If, therefore, the phenomenon of the northern and eastern United States, usually supposed to be glacial, are indeed such, and if there is not sufficient reason for assuming the Canadian highlands to have been the source of the glaciers which produced these phenomena, then the source of them must be sought for elsewhere. I think it will be conceded by all geologists who have studied the glacial phenomena of these regions that both the character of the erratics and the direction of the scratches...
Page 11 - Tables and results of the precipitation in rain and snow in the United States, and at some stations in adjacent parts of North America, and in Central and South America.
Page 187 - Kames" of the Connecticut River valley to the Terrace-formation. Ibid., vol. 22, pp. 451-468. 1882 The flood of the Connecticut River valley from the melting of the Quaternary Glacier.
Page 461 - ... the surface is to the south-west, and in the exact direction of the glacial markings and of what is known to have been the course of transported boulders in north-eastern America. " Moreover, if we bear in mind the ascertained fact that during the glacial period the glaciers moving from the heights of Greenland toward the sea could not have formed detached icebergs, as now, but must have for the time blocked up all avenues except the one of easiest escape for the immense accumulation of ice,...

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