JCFarms Posted November 28, 2022 Share Posted November 28, 2022 Found these on our property and curious as to what they are 1 Link to comment Share on other sites More sharing options...
Tidgy's Dad Posted November 28, 2022 Share Posted November 28, 2022 (edited) These seem to be a species of "Devil's Toenail, the oyster Gryphaea or one of its relatives. Exogyra ponderosa, perhaps ? I'm not sure which genera and species occur in Tennessee. Jurassic to Late Cretaceous, I think. Edited November 28, 2022 by Tidgy's Dad 1 1 Life's Good! Tortoise Friend. Link to comment Share on other sites More sharing options...
historianmichael Posted November 28, 2022 Share Posted November 28, 2022 Would need a better photo of the big oysters to tell what species of Exogyra they are. I can tell you though that they are Upper Cretaceous in age as Tennessee does not have any other age deposits with Exos in them. 1 Follow me on Instagram (@fossil_mike) to check out my personal collection of fossils collected and acquired over more than 15 years of fossil hunting! Link to comment Share on other sites More sharing options...
Parthicus Posted November 28, 2022 Share Posted November 28, 2022 A length standard (inches or centimeters) would help, but these look almost exactly like the Cretaceous-age Exogyra that I've found in New Jersey. 1 Link to comment Share on other sites More sharing options...
JCFarms Posted November 28, 2022 Author Share Posted November 28, 2022 I will get some better photos with measurements and post Link to comment Share on other sites More sharing options...
historianmichael Posted November 28, 2022 Share Posted November 28, 2022 They look stream worn so it might be tough to come up with an ID. I think I can see a little of the pattern on the bottom one that matches Exogyra costata 1 Follow me on Instagram (@fossil_mike) to check out my personal collection of fossils collected and acquired over more than 15 years of fossil hunting! Link to comment Share on other sites More sharing options...
Tales From the Shale Posted December 4, 2022 Share Posted December 4, 2022 Looks like you've got both valves from Exogyra costata. There are two that look like Pycnodonte shells as well. Most of the time you're gonna find heavily worn pieces from river action. Link to comment Share on other sites More sharing options...
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