Biotite from selected localities.
USA | |
| Wallace R. Griffitts and Jerry C. Olson (1953) Mica Deposits of the Southeastern Piedmont:USGS Paper 248-D |
Wallace R. Griffitts and Jerry C. Olson (1953) Mica Deposits of the Southeastern Piedmont:USGS Paper 248-D | |
Wallace R. Griffitts and Jerry C. Olson (1953) Mica Deposits of the Southeastern Piedmont:USGS Paper 248-D | |
Wallace R. Griffitts and Jerry C. Olson (1953) Mica Deposits of the Southeastern Piedmont:USGS Paper 248-D | |
| U.S. Geological Survey,2005,Mineral Resources Data System: U.S. Geological Survey,Reston,Virginia |