Via Smithsonian Mag:
...The newest specimens, reported by scientists John Foster and Rebecca Hunt-Foster in the new issue of the Journal of Vertebrate Paleontology, come from the Jurassic rock of Colorado’s Morrison Formation. Foster and Hunt-Foster describe three distinct skin specimens. Two of them are thin, carbonized patches of fossilized skin that appear to have come from sauropod dinosaurs. Both were found near sauropod bones. The third specimen, however, is not attributed to any particular dinosaur....