Caroline Grace Posted July 25, 2017 Share Posted July 25, 2017 Is this a petoskey stone? I'm familiar with what they look like but this one is hard to tell. It could quite possibly be a petoskey with a smaller pattern, but I can't quite tell. And yes, it was found in northern lower Michigan. (Frankfort, Michigan) Link to comment Share on other sites More sharing options...
izak_ Posted July 25, 2017 Share Posted July 25, 2017 Yes it is. (fossil coral) Cool find, and welcome to the forum! Link to comment Share on other sites More sharing options...
Doctor Mud Posted July 25, 2017 Share Posted July 25, 2017 Looks like fossil coral which is what Petoskey stones are made of. But there are smaller chambers. I don't know if technically Petoskey stones have to be from Hexagonaria percarinata or if it is a generic name for bits of fossil coral from this area. I also don't know enough about coral to say if a single species might have a large variation in chamber size. Link to comment Share on other sites More sharing options...
Miocene_Mason Posted July 25, 2017 Share Posted July 25, 2017 Nice coral find! “...whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been and are being evolved.” ~ Charles Darwin Happy hunting, Mason Link to comment Share on other sites More sharing options...
Carl Posted July 26, 2017 Share Posted July 26, 2017 I think it's a Charlevoix Stone rather than a Petosky Stone. Also a coral, also found in Michigan, also Devonian. But much rarer, and I think much cooler. Supposedly of the genus Favosites. Nice find! Link to comment Share on other sites More sharing options...
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