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Illinois Geology

All sorts of content about Illinois geology: its rocks, landforms and deep history.

Illinois Geological Attractions and Destinations
A selection of the geological attractions of Illinois.

Share Illinois Geology
Share your photos of Illinois geological attractions.

Bedrock Geologic Map of Illinois
Illinois' bedrock is almost totally hidden, but it's shown here with a sketch of the state's geology.

Quaternary Geologic Map of Illinois
Illinois is covered with recent glacial deposits, shown in this map from the state geological survey.

Aeromagnetic Map of Illinois
The state's aeromagnetic features displayed in this U.S. Geological Survey map.

Illinois Geology Gallery
Raymond Wiggers, author of Geology Underfoot in Illinois, will not only show you the geology, but will lecture on it and teach it to you as well.

Illinois Field Trips
The Illinois State Geological Survey has over 100 field-trip guides for the whole state.

Illinois Field Trips
Ellin Beltz features five field trips in Illinois outside Chicago.

Chicago Geology Links
Ellin Beltz has compiled several field trips around Chicago.

Illinois State Geological Survey
Home of a wide variety of information including fossil pages and the "Geobits" series of online pamphlets.

Illinois Quarries
An exhaustive resource on the stone industry of Illinois.

Southern Illinois Geology
Fred Keller discusses southernmost Illinois in the context of the Mississippi Embayment.

Illinois Campgrounds
About.com's David Sweet guides you to the best outdoor places to stay.

Illinois Maps
About.com's Matt Rosenberg helps get you oriented.

Illinois Scenic Roads
About.com's Darren Smith shows you the best ways to get around.

Dinosaurs and Prehistoric Animals of Illinois
About.com's Bob Strauss shows them and tells you more.

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