Oddity from the Potomac river

[cck]

Hi all! I found this strange little item at Stratford Hall on the Potomac River in Virginia, and I can’t place it...bird? Fish, turtle? Perhaps one of you has seen that be before? Many thanks! Miocene deposits btw. 

[Harry Pristis]

It may be a process from a bony fish caudal vertebra.

 

 

[cck]

That’s a pretty good match. Thank you Harry!