National Geologic Map Database
General Information
- Title: Thickness and lithology of Upper Devonian and Carboniferous rocks in Michigan
- Author(s): Cohee, G.V., Macha, Carol, and Holk, Margery
- Publishing Organization: U.S. Geological Survey
- Series and Number: Oil and Gas Investigations Chart OC-41
- Publication Date: 1951
- Map Scale: 1:495,000
- Cross Section: None
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* Names and boundaries are not necessarily authoritative, and are provided here solely for general orientation.