I saw an interesting modern “fossil”, a copper pseudomorph after a scorpion owned Flagg Mineral Foundation member, Bill Yedowitz. It will be featured in an upcoming special edition of Rock and Gem Magazine.
Native copper and copper minerals sometimes replace and coat organic matter left in mines. I have seen pictures of copper replacing mining timbers and wood tool handles. I have heard that a crushed prehistoric Native America was found in an ancient mine in the SW US. Because the bones were replaced with malachite, it was named the Malachite Man and reburied. Another version of the story might be found here: https://en.m.wikipedia.org/wiki/Moab_Man
Although too young to be a fossil yet, older fossils might be found that answer an earlier TFF post about whether or not native copper could be a fossil. @Herb @Auspex