Ordovician - Prairie du Chien Group

Steven Dutch, Professor Emeritus, Natural and Applied Sciences, University of Wisconsin - Green Bay

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Ordovician- Prairie du Chien Group
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Ordovician - Prairie du Chien Group

The Prairie du Chien Group consists of thick, often scarp-forming dolostones. In the western part of the state it occurs as river bluffs and resistant caps on hilltops. Note how the overall outcrop pattern of the Prairie du Chien outlines the Wisconsin Arch.

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Created 11 Sep 1997, Last Update 11 January 2020