This article describes gastroliths ("stomach stones"). It says that gastroliths have been found inside the rib cages of fossilized creatures such as dinosaurs. It also says that gastroliths sometimes contain fossils of older organisms.

Have any examples been found where both these things are true?

  • $\begingroup$ Motivation: I see a young earth creationist arguing that many so-called gastroliths are actually river rocks. The ones found inside dinosaur skeletons are undeniably gastroliths, though. If one like that contained fossils, it would be extremely strong proof that the two fossils date from very different time periods. Especially if they had differing radiometric dates as well. $\endgroup$ Mar 14, 2020 at 1:54
  • $\begingroup$ Just read the article you link it has a link to just such a case at the end. $\endgroup$
    – John
    Mar 16, 2020 at 0:51
  • $\begingroup$ It does imply that's the case in the image, but I don't see a way to confirm or read details. $\endgroup$ Mar 16, 2020 at 15:20
  • $\begingroup$ not that one, try the link labeled Stokes (1987) $\endgroup$
    – John
    Mar 16, 2020 at 19:56
  • $\begingroup$ @NathanLong just fyi if that link turns out to answer your question, it's always okay to post an answer to your own question from time to time. If it's well received then after a few days it's perfectly fine to click "accept" as well. $\endgroup$
    – uhoh
    Mar 18, 2020 at 0:32


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