Reference | {Deposit:: CEDAR VALLEY FORMATION}{Deposit:: LOCATION INCLUDES TWO ADJACENT ABANDONED QUARRIES AT THE}{Deposit:: CENTER OF SEC. 28}{Deposit:: MSHA 1982 METAL-NONMETAL MINE FILE REF.}{Deposit:: IOWA DOT GEN AGGREGATE SOURCE INFO 1981}{Deposit:: IOWA ST HWY COMM AGGREGATE RESOURCE LISTING 1977}{Deposit:: IOWA GEOLOGICAL SURVEY, ANNUAL REPORT 1906, VOL. 17, P. 303.} |