Puzzler From The Potomac

[cck]

Here's a bone chunk that has me confused. Found at Stratford Hall on the Potomac (Mio/Plio) It's worn and parts are broken off, but Pic 1 suggests it had bilateral symmetry. Pic 2 maybe says vertebra or metacarpal, but pic 4 (opposite 2) looks like it terminates (coccyx?) I don't know. Hoping someone has seen this thing or can say it's just a worn broken mystery. Thanks

[RichW9090]

The only thing I can make of it is that it is a worn vertebral element. Sometimes I think I can see axis, sometimes I think I see sacrum. But I wouldn't bet the farm on either.

[cck]

Thanks Rich for the input. With respect to your experience, I'll mark this as too worn/broken to un-puzzle with precision. Thanks.

[RichW9090]

At least from a photo, cck. And at least for me.