Mazon Creek fossil, Illinois

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Photo credit: © George Ostertag / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: braidwood, carboniferous, concretion, concretions, county, creek, fern, fossil, fossils, francis, grundy, historic, illinois, ironstone, lagerstätte, landmark, mazon, national, ostertag, paleontology, pennsylvanian, rock, rockhounding, shale