Description: Geology of Kentucky. Based on Geologic Map of Kentucky,1988, scale 1:500,000. Compiled by Martin C. Noger, Kentucky Geological Survey, from the Geologic Map of Kentucky, scale 1:250,000, 1981 by Robert C. McDowell, George J. Grabowski, and Samuel L. Moore, U.S. Geological Survey. Tectonic and karst interpretations added by Claude S. Dean, 2002.