Chedda Posted November 29, 2020 Share Posted November 29, 2020 Like in the title, I am unsure if this is even a fossil. Link to comment Share on other sites More sharing options...
Ludwigia Posted November 29, 2020 Share Posted November 29, 2020 Either a concretion or a piece of chert in my opinion. 2 Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
Chedda Posted November 29, 2020 Author Share Posted November 29, 2020 11 minutes ago, Ludwigia said: Either a concretion or a piece of chert in my opinion. That's what I figured, but a second opinion never hurts. Link to comment Share on other sites More sharing options...
Rockwood Posted November 29, 2020 Share Posted November 29, 2020 Illinois is known for fossiliferous concretions. Link to comment Share on other sites More sharing options...
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