For some reason, I don't entirely believe you. Might be the whole God of Madness thing. You turning back into Jyggalag anytime soon? I'd like to know when to short the shit out of the entire market.
I know there's some animal fossils in New Zealand that date back to its colonization by the ancestors of the Maori, so about the 1400s. Though I don't know if they are partially or fully fossilized.