National Geologic Map Database
General Information
- Title: Niobium and tantalum in the United States, exclusive of Alaska and Hawaii
- Author(s): Parker, R.L.
- Publishing Organization: U.S. Geological Survey
- Series and Number: Mineral Investigations Resources Map MR-36
- Publication Date: 1963
- Map Scale: 1:3,168,000
- Cross Section: None
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Additional Resources
- Links and Downloads:
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- U.S. Geological Survey
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- Phone: (303) 202-4700 or 1-888-ASK-USGS
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* Names and boundaries are not necessarily authoritative, and are provided here solely for general orientation.