| Reference | {Deposit:: LOCATION INCLUDES 2 SMALL ABANDONED QUARRIES IN SW SEC. 11}{Deposit:: AND SW SEC. 12}{Deposit:: MSHA 1982 METAL-NONMETAL MINE FILE REF.}{Deposit:: USDA SOIL CONSERVATION SERVICE 1980 SOIL SURVEY OF BENTON}{Deposit:: COUNTY}{Deposit:: IOWA DOT 1976 HWY MAP OF BENTON COUNTY}{Deposit:: IOWA GEOLOGICAL SURVEY, ANNUAL REPORT 1906, VOL. 17, P. 303.}{Deposit:: IOWA GEOLOGICAL SURVEY, ANNUAL REPORT 1904, VOL. 15, P. 173.} |