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VI.—The Glacial Phenomena of North America, as studied in Long Island, New York, U.S.
Published online by Cambridge University Press: 01 May 2009
Extract
Having resided for some years past on Long Island, the terminal moraine of the Great American continental glacier, and having given considerable attention to the drift phenomena, I am convinced that no oscillation of the continent has taken place subsequent to the Glacial period; and that the river kames, with their assorted gravel, etc., can be accounted for, without resorting to any such doubtful interpretations. I am aware that the presence of shells in the Boulder-clay argues in its favour; but that shells become mixed with the drift while the glacier is in motion is evident from what Prof. Geikie saw in Scandinavia. I will now try in a brief way to give your readers the result of my observations; and, though the sketch may be somewhat crude and imperfect, it may serve to throw a little light on this difficult problem.
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