1. Geologic map of the Smithfield quadrangle, north-central Kentucky [cartographic material] Yale Public content 1977. 2012-06-04T17:45:10Z. 2012-06-13T15:03:53Z. Luft, Stanley Jeremie, 1927-. U.S. Geological Survey. English. Public. Kentucky, Henry County, Oldham County, and U.S.