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Glaciation in North America
Pleistocene Glaciation in the Midwest
Link to Pleistocene information and maps showing the retreat of glaciers in the Midwestern U.S. Provided by the Illinois State Museum.
http://exhibits.museum.state.il.us/e...cier_maps.html
Link to Pleistocene information and maps showing the retreat of glaciers in the Midwestern U.S. Provided by the Illinois State Museum.
http://exhibits.museum.state.il.us/e...cier_maps.html