Explore / North America / Midwest
Midwest, Illinois
Mazon Creek IL
Fossil concretions
Fossil site Documented siteLegal to collect
What you could find
Reported finds from this ground.
Nails and fittingsPhotos via Wikimedia Commons: North Lincolnshire Museum, Martin Foreman, (CC BY 2.0).
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Why this spot
Mazon Creek concretions (ferns, Tully monster)
Documented rockhounding locality.
Before you go
Hazards noted for this site.
Remote or mine groundShafts, heat and weather
Check access and conditions first.
Keep exploring nearby
More spots in this area.