| Lat / long: | 43.72274, -103.61667 |
| Primary: | Mica |
| Tertiary: | Beryllium |
| Ore: | Beryl, Muscovite |
| Gangue: | Apatite, Biotite, Kyanite, Oligoclase, Quartz, Tourmaline |
| Orebody form: | LENTICULAR |
| Discovery year: | 1942 |
| Operation type: | Unknown |
| Production size: | Small |
| Development status: | Past Producer |
| Host type: | Mica Schist |
| Associated type: | Pegmatite |
| Structure: | Below The 55 Ft Level Is A Strong Fracture Zone Related To A Fault That Strikes N10w And Dips 20 Ne. There Is Little Displacement, But There Are Numerous Related Joints. |
| MRDS | D008100 |
| DEP | 10097813 |
| Reference | {Deposit:: U.S. BUREAU OF MINES, 1955, BLACK HILLS MINERAL ATLAS, SOUTH DAKOTA: PART 2, BUREAU OF MINES INFORMATION CIRCULAR 7707.}{Deposit:: ROBERTS, W.L., AND RAPP, GEORGE, 1965, MINERALOGY OF THE BLACK HILLS, SOUTH DAKOTA SCHOOL OF MINES AND TECHNOLOGY BULLETIN 18.}{Deposit:: USGS PP 247, P. 190-191.}{Production:: U.S. BUREAU OF MINES INFORMATION CIRCULAR 7707.} |
| Reporter | Barari, Rachel A. |