Columbus Mine

CALIF. JOUR. MINES AND GEOL., V. 49, 1953, P. 225.SOUTHERN PACIFIC CO., 1964, MINERALS FOR INDUSTRY,VOL. III - SOUTHERN CALIFORNIA: P. 161.DIBBLEE, T. W., 1970, GEOLOGIC MAP OF THE DAGGETTQUADRANGLE, SAN BERNARDINO CO., CA: U.S. GEOLOGICALSURVEY MISCELLANEOUS GEOLOGIC INVESTIGATIONS I-592,SCALE 1:62,500.LINK, MARTIN H., 1980, SEDIMENTARY FACIES AND MINERALDEPOSITS OF THE MIOCENE BARSTOW FORMATION, CALIFORNIAIN FIFE, D. L. AND BROWN, A. R., EDS. GEOLOGY AND MINERALWEALTH OF THE CALIFORNIA DESERT: SANTA ANA, CALIFORNIA,SOUTH COAST GEOLOGICAL SOCIETY, DIBBLEE VOLUME, P. 199.ANCTIL, R. J., 1956, GEOLOGY AND MINERAL RESOURCES OFTOWNSHIP 8 NORTH, RANGE 1 EAST - SAN BERNARDINO MERIDIAN,SAN BERNARDINO COUNTY, CALIFORNIA: SAN FRANCISCO,SOUTHERN PACIFIC LAND COMPANY (UNPUBLISHED REPORT),P. 3-4.ANCTIL, R. J., AND DORSEY, R. R., 1956, GEOLOGY AND MINERALRESOURCES OF TOWNSHIP 8 NORTH, RANGE 1 AND 2 EAST -SAN BERNARDINO MERIDIAN, SAN BERNARDINO COUNTY,CALIFORNIA: SAN FRANCISCO, SOUTHERN PACIFIC LANDCOMPANY (UNPUBLISHED MAP), #W-0102-08, SCALE 1:24,000.IN PART MODIFIED BY W. L. COONRAD AND E. A. DANEHY, 1958,AND W. L. COONRAD, 1959.