Model of thermal history of the Doushantuo Formation from 635 Ma to present based on its regional tectonic history outlined in this study. See text for details. C, Carboniferous; Cz, Cenozoic; D, Devonian; ϵ, Cambrian; J, Jurassic; K, Cretaceous; O, Ordovician; P, Permian; S, Silurian; Tr, Triassic; Z, Ediacaran.