Map PDF PDF of Bedrock Geology Map of Illinois Front PDF of Bedrock Geology Map of Illinois Back General Information: Description Two 34" x 41" map sheets Publication Details: Publication Date 2005 Authors Dennis R. Kolata Contributors Dennis R. Kolata F. Brett Denny Joseph A. Devera Ardith K. Hansel Russell J. Jacobson Zakaria Lasemi Christopher S. McGarry W. John Nelson Rodney D. Norby Colin G. Treworgy C. Pius Weibel Map Details: Series ID IMAP 14 Theme Bedrock Geology Scale Category Statewide Scale 1:500,000
