Large unknown fossil

[hunterlchapman]

Found this in North Texas in a spot that has produced bison and mammoth fossils before (currently have a mammoth ulna from the site). Due to its large size I'm thinking this one is mammoth as well, just not sure which bone it might be part of.

Any comments or thoughts are more than welcome

[hunterlchapman]

[hunterlchapman]

[hunterlchapman]

Sorry, having trouble uploading pictures (too big)

[Spinosaurus]

how large is this bone?

[hunterlchapman]

14 inches in length. 9 at its widest

[hunterlchapman]

14 inches in length. 9 at its widest. Not sure how much is broken off