I recently found this specimen near a river in SW Montana. It was partially buried in an area that was know to be a popular area for Native Americans to hunt/camp.
It looks to be the bulbus end of a bone or epicondyle, but I am no expert. A smooth gray inner layer is surrounded by a brown porous outer layer that is smooth in spots but rough & eroded in others.
It could be just a strange rock formation, but it was found in an area that had mostly old river rock and this stood out like a sore thumb. Its location also made it a very odd find.
Anyone have any insights? Thanks!