Preliminary integrated geologic map databases for the United States; Minnesota, Wisconsin, Michigan, Illinois, and Indiana

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Description Digital geologic map information with a consistent set of attributes, part of a national compilation of similar maps. Available in formats compatible with GIS.
Originators Nicholson, Suzanne W., Dicken, Connie L., Foose, Michael P., Mueller, Julia A. L.
Publication U.S. Geological Survey Open-File Report 2004-1355

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States or counties