1970. Kingsbury, Robert C. and Hollingsworth, John M. Detached from: Kingsbury, Robert C. Atlas of Indiana, page 17. Scale approximately 2,150,000. Department of Geography, Indiana University.
1997. Powell, Richard L., Frushour, Samuel S., Harper, Denver, and Kersey, Rea Williams. This map data was compiled in 1997 from information available at the time, but was unpublished until until 2002; the map does not reflect any chang... Indiana Geological Survey.
1951. Patton, John B.(John Barratt), 1915-cartographer. Blue line.; August, 1951.; Not for publication, for correspondence use only--Upper margin. Scale approximately 1:1,500,000. Indiana Dept. of Conservation, Geological Survey.
1956. Patton, John B.(John Barratt), 1915-cartographer. Base from Map of Indiana, 1950 edition, published by the U.S. Geological Survey. Minor revisions and additions made from Indiana Department of Cons... Indiana Geological Survey.
1972. Gray, Henry Hamilton,1922-cartographer., Forsyth, Jane L. (Jane Louise),1921-cartographer., Schneider, Allan F. (Allan Frank),1926-cartographer., and Gooding, Ansel Miller. Base map modified from Army Map Service, Map NJ 16-3, 1964.' Includes text, cross section, columnar section, diagram, schematic section, ancillary ... Indiana Geological Survey.
1970. Kingsbury, Robert C. and Hollingsworth, John M. Shows outwash (lake and river sediments), end moraines, drift and un-glaciated bedrock Also shows Illinoian glacial boundary and Kansas glacial bou... Department of Geography, Indiana University.
1958. Wayne, William J.(William John), 1922-cartographer. Base modified from U.S. Geological Survey Base map of Indiana, 1953.; Reprinted with minor modifications, 1963. Scale 1:1,000,000. Indiana Geological Survey.