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low temp geochemistry

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low temp geochemistry

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?

 

 

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Internal molding of bivalve.

 

Coco

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Thomas.Dodson

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.

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low temp geochemistry

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. 

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