Quadrangle Maps

Renault Bedrock Geology 2000 Renault Bedrock Map
Renault Water Table
Repton Bedrock Geology 2014 Bedrock Geology of Repton Quadrangle
Cave-In-Rock, Dekoven, Repton, Saline Mines Surficial Geology 1963 Saline Mines, Cave in Rock, Dekoven, and Repton Quadrangles Surficial Map
Richmond Surficial Geology 2003 Richmond EDMAP
Ridgway Bedrock Geology 2017
River Forest Surficial Geology 1939 River Forest Surficial Map
Roanoke Surficial Geology 2015 54” x 40” sheet, includes map, legend, 4 figures, and descriptive text.  Map is available for download only. This map has not been reviewed by the Illinois State Geological Survey and does not necessarily conform to the usual style and standards for ISGS publications.
Rochelle Bedrock Geology 2019 Bedrock geology of Rochelle Quadrangle, map thumbnail, sheet 1
Rockwood Bedrock Geology 2005 Rockwood Bedrock Map


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