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Mollusk identification


Jose Rivera

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These mollusk fossils are of a friend o mine, who got it from a stonework supplier.

He says that it comes from Arizona, and that is all that he knows about it.

Can you help me to identify the species, and the aproximate age?

Tank you

20200822_213743.jpg

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Trigonia yes. This is the well known 105 million year old Cordova Shell Limestone (Whitestone Lentil) quarried commercially from near Austin, Texas.
 

https://wap.stonecontact.com/cordova-shell-limestone/s15806

29102710-698F-4872-BFCE-43826C552061.jpeg

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My goal is to leave no stone or fossil unturned.   

See my Arizona Paleontology Guide    link  The best single resource for Arizona paleontology anywhere.       

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