Greenockite from Pennsylvania, USA
USA | |
| U.S. Geological Survey/ U.s. Department of the Interior |
| Rocks & Minerals (1955) 30:394 |
Ref.1 The Mineralogy of Pennsylvania S. Gordon 1922. Ref.2 Rocks & Min.: 6:26 10:33-36, 58. | |
| Smith, R. C. II (1977) Zinc and lead occurrences in Pennsylvania. Mineral Resource Report M72. Pennsylvania Geological Survey |
| Smith, R. C. II (1978) |
| Geyer, Smith & Barnes 1976. Mineral Collecting in Pennsylvania pg. 208-9 |
| www.jonesgeo.com (2011) http://www.jonesgeo.com/codorus.htm |
Ueberroth Mine, Friedensville, Saucon Valley, Upper Saucon Township, Lehigh County, Pennsylvania, USA