Biotite from New London County, Connecticut, USA
USA | |
| Jarnot & Jarnot (2004) |
| Dale, T. Nelson and Gregory Herbert E. (1911): The Granites of Connecticut (USGS Bulletin 484). |
| Dale, T. Nelson and Gregory Herbert E. (1911): The Granites of Connecticut (USGS Bulletin 484). |
| Dale, T. Nelson and Gregory Herbert E. (1911): The Granites of Connecticut (USGS Bulletin 484). |