National Geologic Map Database
General Information
- Title: Structural geology of parautochthonous and allochthonous terranes of the Penokean orogeny in upper Michigan - comparisons with northern Appalachian tectonics
- Author(s): Gregg, W.J.
- Publishing Organization: U.S. Geological Survey
- Series and Number: Bulletin 1904-Q
- Larger Work: Contributions to Precambrian geology of Lake Superior region
- Publication Date: 1993
- Map Scale: 1:200,000
- Cross Section: Yes
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