Dinosaur fossils?

[HannahN]

Hello,

I recently acquired these two chunks from a seller in Apache Junction, Arizona. He claims that they are from Colorado, but I was not able to get a more specific location. Can anything be known about these? The seller said the larger piece looked like a vertebrae, but I have no clue. Any insight would be appreciated!

 

[Troodon]

If they are fragments from Colorado it's possible they are from the Morrison Fm given the density of the bone.  But without a more specific locality hard to say.  Yes it possible they are dinosaurian

[erose]

Chunkosaurus.  About as good as you can get....

 

Not to be flippant, just that although those do appear to me like dinosaur bones I have seen, there appears to be nothing diagnostic to take the ID further.

[jpc]

They could also be big  Eocene mammal bones, but Morrison dinosaur bones are definitely more common in CO.