Plagioclase from selected localities.
USA | |
| U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |
Griffitts, Wallace R. and Olson, Jerry C. (1953) Mica Deposits of the Southeastern Piedmont , Part 7 and Part 8 :USGS Professional Paper 248-E | |
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. | |
Griffitts, Wallace R. and Olson, Jerry C.,(1953) Mica Deposits of the Southeastern Piedmont, Part 7 and Part 8 :USGS Professional Paper 248-E | |
| Griffitts, Wallace R. and Olson, Jerry C.,(1953) Mica Deposits of the Southeastern Piedmont, Part 7 and Part 8: USGS Professional Paper 248-E |
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. | |
| Griffitts, Wallace R. and Olson, Jerry C.,(1953) Mica Deposits of the Southeastern Piedmont, Part 7 and Part 8: USGS Professional Paper 248-E |
| U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |