Reference | {Deposit:: AUSTIN GEORGE S., 1972, INDIANA GEOLOGICAL SURVEY, PAGE 26.}{Deposit:: MESA HEALTH AND SAFETY INSPECTION REPORT JUNE 1-2, 1972.}{Deposit:: SHALE IS MINED FROM 25 FT OF SILTY SHALE OF THE LINTON FORMA}{Deposit:: RCF AND CMS LISTS 10/81} |