Mike T Posted August 1, 2021 Share Posted August 1, 2021 Just found this on Lake Michigan beach near Mackinaw. Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted August 1, 2021 Share Posted August 1, 2021 A break and a bit of weathered conchoidal fracturing in a chert nodule, I think. 1 3 Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
Mike T Posted August 1, 2021 Author Share Posted August 1, 2021 Thanks Link to comment Share on other sites More sharing options...
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