| Reference | {Deposit:: BURCHARD, E.F., BUTTS, CHARLES AND ECKEL, E.C., 1910, IRON ORES, FUELS AND FLUXES OF THE BIRMINGHAM DISTRICT, ALABAMA: U.S. GEOLOGICAL SURVEY BULL. 400, P. 9 - 144.}{Deposit:: BUTTS, CHARLES, 1910, DESCRIPTION OF THE BIRMINGHAM QUADRANGLE, ALABAMA: U.S. GEOLOGICAL SURVEY GEOL. ATLAS FOLIO 175.}{Deposit:: BUTTS, CHARLES, 1927, DESCRIPTION OF THE BESSEMER-VANDIVER QUADRANGLES, ALABAMA: U.S. GEOLOGICAL SURVEY GEOL. ATLAS FOLIO 221.} |