Reference | {Deposit:: AUSTIN, G.S.,1963,GEOLOGY OF CLAY DEPOSITS; RED WING AREA, GOODHUE AND WABASHA COUNTIES, MN, MINNESOTA GEOLOGICAL SURVEY R.I. 2.}{Deposit:: GROUT, F.F.,1919, CLAYS AND SHALES OF MINNESOTA;U.S. GEOLOGICAL SURVEY BULL. 678.}{Deposit:: 1919 COMPILA GROUT, F.F. AND SOPER, E.K., BULLETIN 678} |