Clam shell fossil?

Ed_DE

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A swamp is being cleared out in Delaware & a lot of shells are being uncovered. Could this be a shell fossil and what type of shell is it?
Looks possible to me. I don’t know the type.
 

Neat. Looks like it might be a 'Gryphea' or 'Exogyra' species... both commonly known as 'Devil's Toenail':



If so, it would have to be a fossil since both are long-extinct groups of the Oyster family. Exogyra, and Cretaceous would be more likely for Delaware, in which case those are neat finds.
 

Last edited:
Neat. Looks like it might be a 'Gryphea' or 'Exogyra' species... both commonly known as 'Devil's Toenail':



If so, it would have to be a fossil since both are long-extinct groups of the Oyster family. Exogyra, and Cretaceous would be more likely for Delaware, in which case those are neat finds.
Thanks Red-Coat for the help with the ID.
 

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