| Reference | {Deposit:: AUSTIN GEORGE S., 1972, INDIANA GEOLOGICAL SURVEY, PAGE 22.}{Deposit:: MINERAL INDUSTRIES ESTABLISHMENTS IN INDIANA, 1979,}{Deposit:: U. S. BUREAU OF MINES.}{Deposit:: CLAY IS MINED FROM LEACHED SANDY WISCONSINAN GLACIAL LAKE CL}{Deposit:: RCF AND CMS LISTS 10/81} |