1. Map showing bedrock topography and subcrop of selected beds beneath alluvial deposits of the Grove Center quadrangle and part of the Shawneetown quadrangle, Kentucky-Illinois [cartographic material] Yale Public content 1976. 2013-09-11T18:53:16Z. 2013-09-19T18:39:41Z. Smith, Avery E. U.S. Geological Survey. English. Public. Kentucky, Union County, Illinois, and Gallatin County.