Geologic map of the Sharon Grove quadrangle, Todd and Logan Counties, Kentucky
Ulrich, G.E.
A small amount of coal from a bed two to three feet thick in northwestern Sharon Grove quadrangle was mined prior to 1930. Shows of oil and gas have been reported in the Big Clifty Sandstone Member (Jackson sand) of the Golconda Formation and in the Paint Creek Limestone (exposed in the quadrangle); in the Late Mississippian Ste. Genevieve, St. Louis, and Warsaw Limestones (not exposed); and in thin sandstone and shale breaks below the Chattanooga Shale. Quartz sandstone occurs in an even-bedded layer about 20 feet thick, 50-100 feet above the base of the Caseyville Formation and may have potential value as glass or molding sand.