| Lat / long: | 39.64582, -105.27252 |
| Primary: | Mica, Beryllium, Feldspar |
| Tertiary: | Tantalum, Niobium (Columbium) |
| Ore: | Beryl, Columbite, Muscovite, Tantalite |
| Gangue: | Garnet, Tourmaline |
| Operation type: | Unknown |
| Production size: | Small |
| Development status: | Past Producer |
| Host rock: | Idaho Springs Formation---Feldspar-Rich Gneiss;Idaho Springs Formation---Amphibolite |
| Host type: | Gneiss |
| Associated rock: | Pegmatite |
| Associated type: | Pegmatite |
| Structure: | Front Range Uplift, Denver Basin, Floyd Hill Fault Zone |
| Tectonic: | Central Cordillera (Southern Rocky Mtns) |
| MRDS | D010183 |
| DEP | 10101837 |
| 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. 29}{Deposit:: USBM MIN. EXAM. FILE, REPTS. OF 4/6/59 AND 2/9/59 (FROM ORIGINAL CRIB RECORD)}{Production:: ORIGINAL CRIB RECORDS (PROBABLY USBM REFERENCE)} |
| Reporter | Schwochow, Stephen D., Spanski, Gregory T. |