National Geologic Map Database
General Information
- Title: Preliminary digital geologic map of the Penokean (Early Proterozoic) continental margin in northern Michigan and Wisconsin
- Author(s): Cannon, W.F., and Ottke, Doug
- Publishing Organization: U.S. Geological Survey
- Series and Number: Open-File Report OF-99-547
- Publication Date: 1999
- Cross Section: None
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Additional Resources
- Links and Downloads:
- Publication (includes GIS data)
- For more information, please contact:
- U.S. Geological Survey
- USGS Information Services
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- Denver, CO 80225
- Phone: (303) 202-4700 or 1-888-ASK-USGS
- Fax: (303) 202-4710
* Names and boundaries are not necessarily authoritative, and are provided here solely for general orientation.