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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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Geologic map of the Castle Rock and Long Hollow 7.5-minute quadrangles, Grant County, Wisconsin
The geologic map of the Castle Rock and Long Hollow quadrangles includes 1:24,000 scale mapping of both surficial and bedrock geology. The accompanying report presents new observations about bedrock folds and fracture sets in this portion of the Driftless Area that lies just north of the main Upper Mississippi Valley zinc-lead mineral district. The...-
Geologic map of the Castle Rock and Long Hollow 7.5-minute quadrangles, Grant County, Wisconsin (revised 2022)
2022
Map: 48 in x 36 in, scale 1:24,000
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GIS data for the geologic map of the Castle Rock and Long Hollow 7.5-minute quadrangles, Grant County, Wisconsin [dataset 1]
2022
GIS Data: File geodatabase
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Late Cenozoic Evolution of the Lower Wisconsin River Valley: Evidence for the Reversal of the River
Field trip guidebook describes the evidence suggesting that the Wisconsin River once flowed from west to east. (Prepared for the 2015 Geological Society of America North-Central Section Meeting.)
Publications Catalog
Wisconsin Geological and Natural History Survey
