Reference | {Deposit:: BUSH, A.L., AND OTHERS, 1961, PRELIMINARY GEOLOGIC MAP OF THE GRAY HEAD QUADRANGLE, SAN MIGUEL COUNTY, COLORADO: USGS MAP MF-176.}{Deposit:: SCHWOCHOW, S.D., 1981, INVENTORY OF NONMETALLIC MINING AND PROCESSING OPERATIONS IN COLORADO: CGS MAP SER. 17, PL. 4.}{Deposit:: COLORADO DIV. MINES INF. REPTS. AND ANNUAL OPERATOR REPTS.}{Deposit:: BLM MINERAL SURVEY MS 16025}{Production:: COLORADO DIV. MINES ANNUAL OPERATOR REPTS.} |