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Mazon Creek Fossil Day

October 14, 2023 @ 10:00 am - 3:00 pm

The Mazon Creek fossil beds are a conservation lagerstätte found near Morris, in Grundy County, Illinois. The fossils are preserved in ironstone concretions, formed approximately 309 million years ago in the mid-Pennsylvanian epoch of the Carboniferous period.

Displays of Mazon Creek Fossils.

Books on Mazon Creek Fossils for sale

Bring your Mazon Creek Fossils for identification

Free admission

Lecture on collecting Mazon Creek fossils – 1:00 pm



October 14, 2023
10:00 am - 3:00 pm


Coal City Public Library
85 N. Garfield St.
Coal City, IL 60416 United States
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(815) 634-4552
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