Surficial Geology of Johnston City Quadrangle, Williamson and Franklin Counties, Illinois

Mode of access: Internet; current access through PURLRelief shown by contours and spot heights"Geology based on field work and data analysis by Leon R. Follmer and W. John Nelson, 2001-2004.""Digital cartography by Jane E.J. Domier, Jennifer E. Carrell, Amanda Tovey, Joseph B. Magnotta, and Daniel R. Stevenson, Illinois State Geological Survey.""[Copyright] 2010 University of Illinois Board of Trustees."Includes location map, index to adjoining quadrangles, and index to Williamson County geology and 7.5-minute quadrangle