Circular 604
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Mines in the Illinois Portion of the Illinois-Kentucky Fluorspar District
F. Brett Denny,1 W. John Nelson,1 Jeremy R. Breeden,1 and Ross C. Lillie2
1Illinois State Geological Survey, Prairie Research Institute, University of Illinois, Champaign,Illinois
2North Star Minerals, Traverse City, Michigan
Suggested citation: Denny, F.B., W.J. Nelson, J.R. Breeden, and R.C. Lillie, 2020, Mines in the Illinois portion of the Illinois-Kentucky Fluorspar District: Illinois State Geological Survey, Circular 604, 73 p. and map.