low temp geochemistry Posted July 13, 2021 Share Posted July 13, 2021 I'm stumped on this find. Interesting line of symmetry runs through the fossil. Found in approximate location of a 2' diameter turtle back shell. It's not a bivalve I've ever seen. Sure looks like a vertebrae however the spinal cord would not have been closed on the anterior. What is it? Suggestions? Link to comment Share on other sites More sharing options...
Coco Posted July 13, 2021 Share Posted July 13, 2021 Internal molding of bivalve. Coco 3 ---------------------- OUTIL POUR MESURER VOS FOSSILES : ici Ma bibliothèque PDF 1 (Poissons et sélaciens récents & fossiles) : ici Ma bibliothèque PDF 2 (Animaux vivants - sans poissons ni sélaciens) : ici Mâchoires sélaciennes récentes : ici Hétérodontiques et sélaciens : ici Oeufs sélaciens récents : ici Otolithes de poissons récents ! ici Un Greg... Link to comment Share on other sites More sharing options...
Thomas.Dodson Posted July 13, 2021 Share Posted July 13, 2021 Agree with Coco. I’m not familiar enough with Duck Creek fauna to know if this internal mold is identifiable further (they often only are in less diverse deposits) but ark clams and other high umbo bivalves are known from Duck Creek. 1 Link to comment Share on other sites More sharing options...
low temp geochemistry Posted July 14, 2021 Author Share Posted July 14, 2021 Coco hit it. I see it now. Kudo's for Coco. The western edge of Fort Worth Tx shows the fossil rich Duck Creek Fm (mid-Cretaceous) and polluted with ammonites and univalves. I've pulled up a spectacular shell beach slab of univalves only. Bivalves, from my cumulative search time of 40 hours or so across sites 5 miles apart, are dang unusual ... this might be the first one I've seen. Link to comment Share on other sites More sharing options...
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