National Geologic Map Database
General Information
- Title: Carbonatites of the world, explored deposits of Nb and REE -- database and grade and tonnage models
- Author(s): Berger, V, I., Singer, D.A., and Orris, G.J.
- Publishing Organization: U.S. Geological Survey
- Series and Number: Open-File Report OF-2009-1139
- Publication Date: 2009
- Map Scale: 1:196,000,000
- Cross Section: None
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