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The Driftless Area: The extent of unglaciated and similar terrains in Wisconsin, Illinois, Iowa, and Minnesota
The Driftless Area of southwestern Wisconsin and northwestern Illinois got its name from the lack of glacial sediment ("drift") covering the landscape. The surficial geology and topography of the Driftless Area are thus distinct from the surrounding region where multiple phases of glaciation left their mark. This pamphlet, a collaborative effort between...-
GIS data for the outline of the Driftless Area and similar terrains in Wisconsin, Illinois, Iowa, and Minnesota
2023
GIS Data: shapefile, metadata
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Page-sized and web-version maps of the Driftless Area and similar terrains in Wisconsin, Illinois, Iowa, and Minnesota
2023
Map: 1 p. (8.5 in x 11 in)
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Glaciation of Wisconsin
Brief technical description of Wisconsin’s geologic history, glacial phases and lobes, and correlation and distribution of Pleistocene units. Heavily illustrated.