Illinois Map Series (IMAP)

The I-Map series includes maps of a variety of geologic themes covering the entire state or a region of the state. These maps are peer reviewed and conform to ISGS standards. Those available as downloadable PDF files are listed here. Many more are available for sale as paper copies and can be found at ISGS paper and CD/DVD map products.

Bedrock Geology Map of Illinois
Bedrock Topography of the Middle Illinois River Valley, Bureau, Marshall, Peoria, Putnam, and Woodford Counties, Illinois
Coal Industry Map
Elevation of the Basal Sand of the Middle Illinois River Valley, Bureau, LaSalle, Marshall, Peoria, Putnam, and Woodford Counties, Illinois
Illinois Land Cover Map
Structural cross section of the Paleozoic rocks in Illinois, Wayne County to Stephenson County
Surficial Geology of the Middle Illinois River Valley, Bureau, Marshall, Peoria, Putnam, and Woodford Counties, Illinois

Other ISGS online map Series

Updated 02/20/2012 SLD