[Coyoteman]

This bone has measurable/detectable amounts of C-14 in it. We are told that the C-14 is there from water contamination and not because it was there when the dino was alive. Therefore, if ground water contamination is the source for C-14, the fossils themselves cannot therefore be considered hermetically sealed.

Trace amounts of C14 can be created by radioactivity in rocks.

[Diplomat]

How does this C-14 get transferred into the fossil? I.e. would the reaction not have to take place in the fossil itself?

Also, are the scientists studying this fossil specifically stating racioactive rocks as the source of C-14?