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Bedrock Stratigraphic Units in Wisconsin
Chart showing the layers of rock (stratigraphy) present in Wisconsin, their geologic ages, and the associated rock units. The page-size version explains how to read and interpret this complex diagram. (The stratigraphic column is also available as a poster, see WOFR2006-06.) -
Mineral and Water Resources of Wisconsin
Report prepared by the U.S. Geological Survey in collaboration with the Wisconsin Geological and Natural History Survey. Printed at the request of Committee on Interior and Insular Affairs, U.S. Senate.