Possible bone fragment from Fort Worth, Texas.

[TylerD]

I was searching along a rocky creek in an area of Fort Worth, Texas (lower cretaceous) where the Goodland Formation, Kiamichi Formation, Walnut Clay, and Fort Worth Limestone all meet, and was finding echinoids, ammonites, and various mollusk shells, when I found this. I've never found any vertebrate fossils before, but it looks a lot like the end of a bone at a joint. It's got near perfect symmetry, and had a slightly lighter colored and more bumpy texture on the broken parts. 

 

I would like to know if I have in fact found a fossil bone, and if so, any ideas for what it belonged to?

[Rockwood]

Bivalve steinkern

[TylerD]

42 minutes ago, Rockwood said:

Bivalve steinkern

I think I can see that. I haven't found any shaped like that, or that big, so I didn't even think of that as a possibility. 

[TylerD]

Still on the hunt for a vertebrate fossil then.