| Reference | {Deposit:: SHAFFER, NELSON R., 1976, INDIANA GEOLOGICAL SURVEY, PAGE 11.}{Deposit:: SILTSTONE AND SHALE ARE MINED FROM THE CARWOOD FORMATION, BO}{Deposit:: GROUP.}{Deposit:: SILTSTONE AND SHALE ARE MINED FROM 20-90 FEET OF THE BORDEN}{Deposit:: MESA HEALTH & INSPECTION REPORT 4-10-72.}{Deposit:: MSHA MINE LIST 7-23-77.}{Deposit:: RCF LIST 10/81} |