>but end-Permian seemed to be a "first gradually, then suddenly" as pollution from the traps put more and more stress on the biosphere until suddenly... AKA th

>but end-Permian seemed to be a "first gradually, then suddenly" as pollution from the traps put more and more stress on the biosphere until suddenly... AKA the Seneca effect. See https://terebess.hu/keletkultinfo/seneca.pdf https://terebess.hu/keletkultinfo/seneca.pdf