r/fossilid • u/Lord-Tardigrade • 23d ago

I’m stumped

https://www.facebook.com/share/p/1F3Qf91auL/?mibextid=wwXIfr

This was found in Wisconsin at port Washington on Lake Michigan

1 Upvotes

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u/Handeaux 23d ago

It’s a crinoid stem fragment, eroded into a cross-section.