| Lat / long: | 38.12751, -105.33307 |
| Primary: | Silver, Gold |
| Secondary: | Lead, Zinc, Copper |
| Tertiary: | Tellurium |
| Ore: | Chalcopyrite, Galena, Gold, Hemimorphite, Jamesonite, Petzite, Smithsonite, Sphalerite, Tetrahedrite |
| Gangue: | Calcite, Dolomite, Pyrite, Quartz, Kaolin |
| Orebody form: | Pipe |
| Discovery year: | 1877 |
| Operation type: | Underground |
| Production size: | Small |
| Development status: | Past Producer |
| First production started: | 1878 |
| Last production ended: | 1958 |
| Host rock: | Undivided Gneiss, Granite Boulders Included In Breccia |
| Host type: | Tuff,Volcanic Breccia (Agglomerate),Andesite |
| Associated rock: | Rosita Andesite |
| Associated type: | Tuff,Andesite |
| Structure: | Rosita Volcanic Center, Wet Mtns, Breccia Pipe, Faults, Mineralized Fissures, Fractures |
| Tectonic: | Central Cordillera (Southern Rocky Mtns) |
| Alteration processes: | Quartz Zone Surrounded By Strong Argillization |
| MRDS | D007930 |
| DEP | 10101726 |
| Reference | {Deposit:: CROSS, WHITMAN, 1896, GEOLOGY OF SILVER CLIFF AND THE ROSITA HILLS, COLORADO: USGS 17TH ANN. REPORT, PT 2, P. 263-403.}{Deposit:: EMMONS, S.F., 1896, THE MINES OF CUSTER COUNTY, COLORADO: USGS 17TH ANN. REPORT, PT. 2, P. 405-472}{Deposit:: SHARP, W.N., 1978, GEOLOGIC MAP OF THE SILVER CLIFF AND ROSITA VOLCANIC CENTERS, CUSTER COUNTY, COLORADO: USGS MAP I-1081.}{Deposit:: Sunshine Mining Co. Colorado exploration files, unpublished data, Colorado Geological Survey.}{Deposit:: COLO DIV MINES SUMM OF MINERAL INDUSTRIES ACTIVITIES, 1974}{Production:: EMMONS, S.F., 1896;} |
| Reporter | Collins, Donna B., Intermountain Field Operations Center (IFOC), Beach, Richard A. |