estimations of CO2 amount in Permian-Triassic boundary, that is often 1600-9000 ppm. Alos need Koppenpasta output. "R" scripts to create accurate map here https://commons...
png and https://commons.wikimedia.org/wiki/File:Permian_triassic_252ma_co2_450_vege_map_1.png https://www.earthbyte.org/paleodem-resource-scotese-and-wright-2018/...
