Every atom of every element heavier than iron is stardust (1). Uranium is no more fossil than gold is. (1) Most of the lighter stuff is stardust too, but there

Every atom of every element heavier than iron is stardust (1). Uranium is no more fossil than gold is. (1) Most of the lighter stuff is stardust too, but there's some small number of heavy nuclei that decayed down to more stable, lighter isotopes, which ultimately leads to iron, the most stable of all.