| Lat / long: | 39.74721, -105.37336 |
| Primary: | Feldspar, Mica, Beryllium |
| Secondary: | REE |
| Ore: | Allanite, Beryl, Microcline, Monazite, Muscovite |
| Gangue: | Garnet, Magnetite, Tourmaline |
| Operation type: | Surface |
| Production size: | None |
| Development status: | Past Producer |
| Host rock: | Pegmatite;Idaho Springs Formation---Interlayered Feldspar-Rich Gneiss, Hornblende Gneiss, Amphibolite, Biotite Gneiss |
| Host type: | Gneiss |
| Associated rock: | Pegmatite |
| Associated type: | Pegmatite |
| Structure: | Front Range Uplift, Denver Basin, Blackhawk Fault, Unnamed Syncline |
| Tectonic: | Central Cordillera (Southern Rocky Mtns) |
| MRDS | D010185 |
| MAS | 80590163 |
| DEP | 10013728 |
| Reference | {Deposit:: SHERIDAN, D.M., AND OTHERS, 1972, GEOLOGIC MAP OF THE EVERGREEN QUADRANGLE, JEFFERSON COUNTY, COLORADO: USGS MAP I-786-A}{Deposit:: MEEVES, H.C., AND OTHERS, 1966, RECONNAISSANCE OF BERYLLIUM-BEARING PEGMATITE DEPOSITS IN SIX WESTERN STATES: USBM IC-8298, P. 28}{Deposit:: USBM MIN. EXAM. FILE, REPT. OF 6/1/59 (FROM ORIGINAL CRIB RECORD)} |
| Reporter | Schwochow, Stephen D., Intermountain Field Operations Center (IFOC), Wilson, Anna B. |