URL: https://museum.state.il.us/RiverWeb/landings/Ambot/prehistory/archives/maps/pages/bedgeob.jpg.html

Click on the image to see a listing of pages that reference this illustration. Or you can browse the archives for this section.

Illinois Bedrock Geology.

Illinois State Geological Survey.

Image courtesy of Illinois Department of Natural Resources & the Illinois State Geological Survey.

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