Mine detail: Boulder-Buffalo

Previously called 'Boulder Mine'

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Location

Lat / long:

38.14057, -105.4389

Resource(M)

Primary:	Silver
Secondary:	Iron, Manganese
Ore:	Cerargyrite, Ocher, Psilomelane
Gangue:	Kaolin
Discovery year:	1895

Production

Operation type:	Surface
Production size:	Small
Development status:	Past Producer

Geology

Host type:	Clay, Mud,Volcanic Rock (Aphanitic),Rhyolite
Associated rock:	Silver Cliff Rhyolite Unit 2
Associated type:	Clay, Mud,Rhyolite
Structure:	Silver Cliff Volcanic Center, Wet Mtns, Wet Mtn Valley, Large Nw-Trending Fault
Tectonic:	Central Cordillera (Southern Rocky Mtns)
Alteration processes:	Weak Argillization

References

MRDS	D007838
DEP	10012287
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.M., 1978, GEOLOGIC MAP OF THE SILVER CLIFF AND ROSITA VOLCANIC CENTERS, CUSTER COUNTY, COLORADO: USGS MAP I-1081.}
Reporter	Collins, Donna B.