Illinois State Geological Survey Fluorite District Map Spivey_Mine_300_450_600Level1978_AppliedChemical_HarrisCreek_PlanCrossDrill, Hardin County Illinois
For additional information contact the Illinois State Geological Survey For additional information contact the Illinois State Geological Survey Phone: 217-333-5109 http://www.isgs.illinois.edu
Illinois State Geological Survey Fluorite District Map Spivey_Mine_300_450_600Level1978_AppliedChemical_HarrisCreek_PlanCrossDrill, Hardin County Illinois