Illinois. Kentucky. x x. x x. Harrisburg. Cave-in-Rock. Rosiclare. Marion. Salem. Mexico. Fredonia. Eddyville. Princeton.

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1 DuQuoin Monocline Omaha Dome Wabash Valley Indiana Evansville Cottage Grove Cape Girardeau Ste. Genevieve Harrisburg Lusk Creek Dion Springs Graben Rock Creek Graben Shawneetown Fault Hicks Dome Eagle Valley- Moorman Syncline Tabb Fault System entucky Rough Creek Fault System Missouri 2 miles 25 5 kilometers Paducah Mississippi Embayment Sediments Reelfoot Rift Legend high angle reverse fault normal fault monocline syncline structure concealed under sediments Pennyrile Fault System fluorite mine area fluorite mine igneous dome -entucky Fluorite District Mississippi Embayment Sediments

2 Harrisburg Empire Stewart Interstate Du Dyers Hill Goose Creek Salem Cave-in-Rock Commodore Moore Hill Cave-in-Rock Levias-Crittenden Springs Clay Lick Tabb Du Meico Fredonia Cretaceous and Tertiary undivided Igneous diatremes Igneous dike showing trend Carbondale Formation Tradewater Formation Caseyville Formation Chesterian Undifferentiated Upper Valmeyeran Lower Valmeyeran Undifferentiated -entucky Fluorite District Fluorite sub-districts Fluorite mine Marion Cretaceous and Tertiary Permian (igneous) High angle reverse fault Graben Fault Tabb Calvert City Eddyville entucky 2 4 Miles Princeton 4 8 ilometers 2 6

3 Bethel SS. bedded fluorite Downey s Bluff LS. Stratiform or Bedding Replacement 5 5 Vertical Feet horizontal Au Vase SS. Ste. Genevieve LS. vein fluorite Vein Deposit 5 5 horizontal Vertical Feet

4 AGE SERIES FORMATIO THICESS ft. Atokan Morrowan Chesterian? Tradewater Caseyville inkaid Degonia Clore Palestine Menard Waltersburg Vienna Tar Springs Glen Dean Hardinsburg Golconda Cypress Ridenhower Bethel Downeys Bluff Yankeetown Renault Au Vases Ste. Genevieve GRAPHIC COLUM RAGE OF FLUORITE MIERALIZATIO Vein Strata-bound Upper St. Louis 5-4 Valmeyeran Salem 5 +/- Lower Ullin 25-6? Fort Payne Middle Lower ew Albany Group Lingle Grand Tower Clear Creek 95 +/- 25 +/-

5 4 Harrisburg Igneous breccia and diatremes Igneous dike showing trend -entucky Fluorite District Graben Fault High angle reverse fault Radiometric age determinations of igneous rocks in the region Reported age of fluorite mineralization Hicks Dome 2 Downeys Bluff Sill 275 +/- 24 Ma Zartman et al., 967 Grant Intrusive Breccia /-.7 Ma; Reynolds et al., 997 Ma yr. PERIOD Paleogene Cretaceous 2 Davenport Mine Dike 27 +/-. Ma Fifarek et al., 2 2 Jurassic Triassic Cave-in-Rock 4 Cottage Grove Dike /-.9 Ma Denny, 25 Approimate age of igneous intrusions 4 Permian Missisippian Marion Salem Meico Fredonia entucky Calvert City Eddyville Princeton 2 4 Miles 4 8 ilometers 2 6

6 T9S TS R6E R7E R8E R9E A Eagle Valley Syncline Shawneetown Line of Cross Section Saline County Pope County Herod Garden of the Gods A Hamp Fault Gallatin County Hardin County Goose Creek Lusk Creek TS T2S Dion Springs Graben Raum Igneous dikes and diatremes Carbondale Formation Tradewater Formation Caseyville Formation Chesterian Undifferentiated Upper Valmeyeran Lower Valmeyeran Undifferentiated Hobbs Creek Permian TS Du Interstate 2 Hicks Dome Rock Creek Graben miles Tolu Arch Peters Creek entucky Geologic Map of Hicks Dome Area Southeastern Fig. 6

7 South Looking west along the western end of the Eagle Valley Syncline orth 5, 5, 2, 25,, 5, 4, feet 5 Sea Level feet Hardin County Gallatin County Hicks Dome approimatey 4 miles (6.4 km) Garden of the Gods Eagle Creek Herod Springfield Coal Shawneetown Horseshoe Upheavel Mv Mv Carbondale Formation Tradewater Formation Caseyville Formation Chesterian Undifferentiated Valmeyeran Undifferentiated Horizontal and vertical scale in feet with approimately 4 vertical eaggeration ote: This generalized cross section. Cross section along the Eagle Valley Syncline Gallatin and Hardin Counties,