 These bodies of water were oxygen deficient, leading to the well-preserved "Scipionyx" specimen, much like the fine fossil preservation seen in Germany's "Archaeopteryx".Parts of the windpipe, intestines, liver, blood vessels, cartilage, horn sheaths, tendons and muscles were fossilised in the fine limestone.The specimen's liver was preserved in the form of a red hematite halo retaining the shape it had when the animal was alive.