National Geologic Map Database
General Information
- Title: Zinc-lead-copper resources and general geology of the Upper Mississippi Valley district
- Author(s): Heyl, A.V., Lyons, E.J., Agnew, A.F., Behre, C.H., Willman, H.B., and Reynolds, R.R.
- Publishing Organization: U.S. Geological Survey
- Series and Number: Bulletin 1015-G
- Larger Work: Contributions to economic geology, 1954
- Publication Date: 1955
- Map Scale: 1:126,720
- Cross Section: None
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