Carbons that pre-date rock records were found in ancient minerals in Australia.

GEOLOGY
The Brule River in Minnesota splits just before it enters Lake Superior. One side becomes a 50 foot waterfall, and the other pours into a giant pothole. Where it goes from there is a mystery.
Temperature spikes on boiling-hot Venus have scientists thinking the planet has active volcanoes.
Either way, it isn't going to be pleasant.