K Feldspar from selected localities.
USA | |
| Buchholz, T. W., Falster, A. U. & Simmons, W B. (2002), Minerals of the Ladick East Quarry, Marathon County, Wisconsin:Rocks and Minerals: 77 (3): 169. |
T.W. Buchholz, A.U. Falster, Wm.B. Simmons (2000) Mineral News, 16, #5. |
Koss pit, Nine Mile Pluton, Wausau Intrusive Complex, Marathon County, Wisconsin, USA