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Climate Visualization


During the Great Ice Age, or Pleistocene Epoch, large portions of Canada and the Northern United States were blanketed by the continental ice sheet. Much of the rich soil of the American Midwest is glacial in origin, and the drainage patterns of the Ohio River and the position of the Great Lakes were influenced by the ice. This image shows the maximum extent of glacial ice in the north polar area during the Pleistocene.
Credit: USGS

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