 | | Journal (article/letter/editorial) | | MINERALS OF THE Harris Creek Fluorspar District Hardin County, Illinois ROSS C . L I L L I E P . O . B o x...O V E R 140 Y E A R S , the mines of southern Illinois have been producing lead, zinc, and fluorspar...come from the renowned district of Cave in Rock and adjacent deposits. Mining activity is presently restricted...to new orebodies recently discovered in the Harris Creek district (figure 1). History The earliest known...located on the southwest end of the Cave in Rock district. On an excursion in 1821, he revisited the same area |  | | Report (issue) | | GEOLOGY OF THE FLUORSPAR DEPOSITS OF . ILLINOIS BY J. IA.R\' IN \YELLER, ROBERT M. GROGAN, AND FRANK...PRINTED BY AUTHORITY OF THE STATE OF ILLINOIS URBANA, ILLINOIS 1 9 52 MANUSCRIPT COMPLETED FEBRUARY...FEBRUARY 1951 ORGANIZATION STATE OF ILLINOIS HON. ADLAI E. STEVENSON, Governor DEPART 1ENT OF REGISTRATION...he University of Illinois DEL YTE W. MORRIS, PH.D., President of Southern Illinois University GEOLOGICAL...EDUCATIONAL EXTENSION GILBERT 0 . RAASCH, PH.D., Geologist in Charge MARGARET HAYES, B .S., Research Assistant |
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