During the Late Pleistocene, the Laurentide ice sheet reached from the Rocky Mountains eastward through the Great Lakes, into New England, covering nearly all of Canada east of the Rocky Mountains.

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Wikipedia contributors. (2023, November 29). Laurentide Ice Sheet. In Wikipedia, The Free Encyclopedia. Retrieved February 23, 2024, from https://en.wikipedia.org/w/index.php?title=Laurentide_Ice_Sheet&oldid=1187465770

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Ripples around a log in the Skykomish

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Laurentide Ice Sheet (Wikipedia) The Laurentide Ice Sheet was a massive sheet of ice that covered millions of square miles, including most of Canada and a large portion of the Northern United States, multiple times during the Quaternary glacial epochs, from 2.58 million years ago to the present.

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