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But there are other chemicals that a civilization might produce that are also visible in the geological record. Fertilizers would also leave a mark.
by noslenwerdna 2y ago
But there are other chemicals that a civilization might produce that are also visible in the geological record. Fertilizers would also leave a mark.
- stuxnet 2y agohttps://en.wikipedia.org/wiki/Terra_preta https://en.wikipedia.org/wiki/Terra_preta > Terra preta soils are found mainly in the Brazilian Amazon, where Sombroek et al. estimate that they cover at least 0.1–0.3%, or 6,300 to 18,900 square kilometres (2,400 to 7,300 sq mi) of low forested Amazonia; but others estimate this surface at 10.0% or more (twice the area of Great Britain).