Gahnite from Maryland, USA
USA | |
| Rocks & Min.: 11: 27 & 121. |
| Econ Geol (1989) 84:663-675 Dana 7:I:264. |
| Dana 6: 1071 Rocks & Min.: 11:27, 121. |
| Mines of the Washington D.C Area |
| Ref.: Minerals of the Washington D.C. Area. |
| American Mineralogist (1926) 11:35-38 Ref.: Minerals in the Washington D.C. Area. |
Ben Murphy Mica Mine, Scaggsville, Howard County, Maryland, USA