Specific evidence please.
BTW...Are you saying that the soft tissue of the T. Rex and Hadrosaur were also replaced by exogenous organic minerals?
Check the post above, I linked to the paper with the detailed information on the find. I didn't say the material had to be exogenous organic, some fossils, such as fossils in coal, are endogenous minerals, such as nothing remaining but the carbon or calcium that was present inside the original organism.