National Geologic Map Database
General Information
- Title: U.S. Geological Survey National Mineral Resource Assessment -- an estimate of undiscovered deposits of gold, silver, copper, lead, and zinc in the United States
- Author(s): Schulz, K.J., and Briskey, J.A.
- Publishing Organization: U.S. Geological Survey
- Series and Number: Circular 1294 [paper 18]
- Larger Work: Proceedings for a workshop on deposit modeling, mineral resource assessment, and their role in sustainable development
- Publication Date: 2007
- Map Scale: 1:23,500,000
- Cross Section: None
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