Biotite from selected localities.
USA | |
| NJ State Geol. Ann. Rpt. (1886):104. |
| The Geology of Orange Co., Geol. Survey of NY, Reis, Heinrich (1895): 406. |
USA | |
| NJ State Geol. Ann. Rpt. (1886):104. |
| The Geology of Orange Co., Geol. Survey of NY, Reis, Heinrich (1895): 406. |