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Wisconsin Glacial Stage
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Map showing the extent of the Laurentide, Cordilleran, and Greenland ice sheets during the Wisconsin glaciation, roughly 100,000 to 11,000 years ago. The Laurentide Ice Sheet covers most of present-day Canada and parts of the northern United States in light blue, the Cordilleran Ice Sheet covers the Pacific Northwest in teal, and the Greenland Ice Sheet is marked in purple. Modern international and state or provincial boundaries are outlined for reference. Map of the northern United States illustrating the extent of Pleistocene ice sheets, with shaded and outlined areas showing the maximum reach of the Wisconsinan, Illinoian, Kansan, and Nebraskan glaciations. The map uses different colors and line styles to distinguish each glacial advance and includes a labeled Driftless Area that remained unglaciated.
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Wisconsin Glacial Stage: References & Edit History

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Article History

Type Description Contributor Date
Media added. Aug 21, 2023
Link and photo added. Jun 29, 2023
Described some of the factors which could have triggered the recession of the ice sheets during the Wisconsin Glacial Stage. Sep 23, 2021
Article revised and updated. Jul 28, 2021
Invalidated site: United States Geological Society - Definition of Wisconsinan Stage. Jan 22, 2020
Add new Web site: United States Geological Society - Definition of Wisconsinan Stage. Nov 15, 2015
Add new Web site: Wisconsin Geological and Natural History Survey - Ice Age Geology. Nov 15, 2015
Updated geologic time data. Sep 11, 2009
Article added to new online database. Jul 20, 1998
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