Biotite from selected localities.
USA | |
| U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |
| U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |
R&M 75:3 pp 156-169 | |
R&M 75:3 pp 156-169; Staatz, M. H.; Page, L. R.; Norton, J. J.; Wilmarth, V. R. (1963) Exploration for beryllium at the Helen Beryl, Elkhorn, and Tin Mountain pegmatites, Custer County, South Dakota. USGS Prof. Paper 297C. | |
R&M 75:3 pp 156-169 | |
SDSMT Bull 18 Roberts and Rapp "Mineralogy of the Black Hills" | |
U.S. Geological Survey Professional Paper 297 | |
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. | |
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.; U.S. Geological Survey Professional Paper 297 |