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Illinois

Mazon Creek (Mazonia State Fish and Wildlife Area)

Fossil site Documented siteLegal to collect
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What you could find

Reported finds from this ground.

Nails and fittingsNails and fittings
FossilsFossils

Also reported: ferns.

Photos via Wikimedia Commons: North Lincolnshire Museum, Martin Foreman, (CC BY 2.0), Partonez (CC BY-SA 4.0).

Why this spot

Pennsylvanian Francis Creek Shale concretions

Home of Tullimonstrum, the Illinois state fossil, a world class soft bodied fossil site.

Keep exploring nearby

More spots in this area.

Check access and collecting rules for each site.
Mazon Creek / Braidwood concretions, Illinois1 km away · Fossil site
›
Mazon Creek (Pit 11 / Braidwood spoil piles)2 km away · Fossil site
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Mazon Creek IL: fossil concretions8 km away · Fossil site
›
Cardiff coal mining boomtown21 km away · Ghost town
›