Biotite from selected localities.
USA | |
| MRDS database Dep. ID file #10039594, MRDS ID #M050391.; Econ Geol (1980) 75:673-683 |
| Singer, D.A., Berger, V.I., and Moring, B.C. (2005): USGS Open-File Report 05-1060 |
| MRDS database Dep. ID file #10103756, MRDS ID #M050530. |