| Location: | Pennington County, South Dakota, United States, North America |
| Lat / long: | 43.87635, -103.36778 |
| dep_id: | 10012470 |
| mrds_id: | D008116 |
| Commodity type: | metallic and nonmetallic |
| Major mineral: | Feldspar, Beryllium |
| Operation type: | Unknown |
| Production size: | Small ammount of material produced |
| Development status: | Past Producer |
| ore: | Beryl, Feldspar |
| gangue: | Albite, Apatite, Cassiterite, Cleavelandite, Columbite, Goethite, Graphite, Microcline, Muscovite, Opal, Plagioclase, Quartz, Spodumene, Tourmaline, Uraninite, Uranophane, Vivianite, Zircon |
| orebody_fm: | TABULAR DIKE |
| alteration: | Iron-Stained |
| Reporter: | Barari, Rachel A. |
| hrock_type: | Pegmatite |
| arock_type: | Pegmatite |
| Structure: | The Pegmatite Is On The Southern End Extremity Of A N-S Ridge. |
| References: |
- Deposit:: USBM INFO CIRC 7707, P. 71-72.
- Deposit:: DANAS SYSTEM OF MINERALOGY, ED VOL 2, P. 952-953.
- Deposit:: ENCYCLOPEDIA OF MINERALS
- Deposit:: SPRING, S. G., AND ANDERSON, D. W., 1957, A GEOLOGIC INVESTIGATION OF THE FERGUSON PEGMATITE, SOUTH DAKOTA SCHOOL OF MINES AND TECHNOLOGY.
- Production:: USBM INFO CIRC 7707, P. 72.
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