Plagioclase from selected localities.
USA | |
| Wallace R.Griffitts and Jerry C.Olson (1953) Mica Deposits Of The Southestern Piedmont:USGS Paper 248-D |
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. | |
| Wallace R. Griffitts and Jerry C. Olson (1953) Mica Deposits of the Southeastern Piedmont: USGS Paper 248-D |
Bureau of Mines-1995 | |
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. | |
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. |