| Lat / long: | 38.26807, -105.54641 |
| Primary: | Vermiculite |
| Secondary: | Niobium (Columbium) |
| Tertiary: | Thorium, REE |
| Ore: | Columbite, Monazite, Perovskite, Pyrochlore, Thorianite, Vermiculite |
| Operation type: | Surface |
| Production size: | Small |
| Development status: | Past Producer |
| Last production ended: | 1945 |
| Host type: | Gabbro,Pyroxenite |
| Associated rock: | Pyroxenite, Gabbro Of The Gem Park Complex;Carbonatites Of The Gem Park Complex |
| Associated type: | Gabbro,Pyroxenite,Lamprophyre |
| Structure: | Central Cordillera (Southern Rocky Mountains), Gem Park Complex |
| Tectonic: | Wet Mountains |
| Alteration processes: | Fenitization |
| MRDS | D009705 |
| DEP | 10013422 |
| Reference | {Deposit:: PARKER, R. L. AND SHARP, W. N., 1970, MAFIC-ULTRAMAFIC IGNEOUS ROCKS AND ASSOCIATED CARBONATITES OF THE GEM PARK COMPLEX, CUSTER AND FREMONT COUNTIES, COLORADO: USGS PROFESSIONAL PAPER 649, 24 P.}{Deposit:: TAYLOR, R. B., SCOTT, G. R., WOBUS, R. A. AND EPIS, R. C., 1975, RECONNAISSANCE GEOLOGIC MAP OF THE COTOPAXI 15-MINUTE QUADRANGLE, FREMONT AND CUSTER COUNTIES, COLORADO: USGS MAP I-900, 1: 62,500} |
| Reporter | Collins, Donna B. |