Prairie Research Institute

Illinois State Geological Survey

We’ve recently redesigned the Illinois State Geological Survey website, and the page you are looking for is no longer here. Maybe try one of the links below or a search?

If you’re looking for maps, publications, GIS applications or wikis, you’ll find them on our new Resources site.

For services like drilling or geochemistry, you’ll want our Capabilities & Services page.

If you’re looking for someone on our staff, try the Directory.

If you need ISGS data, please fill out our data request form.

Finally, if you’ve found a rock, mineral or fossil that you would like to know more about, you can submit questions and upload images through our Ask a Geologist form.