1. Geologic map of the Salvisa quadrangle, central Kentucky [cartographic material] Yale Public content 1968. 2012-02-20T19:05:13Z. 2012-03-06T15:51:58Z. Cressman, Earle Rupert, 1923-. U.S. Geological Survey. English. Public. Kentucky, Anderson County, Woodford County, and Mercer County.