Fig. 2: The stratigraphic profiles of geochemical data.
From: Active methanogenesis during the melting of Marinoan snowball Earth
Stratigraphic variations of δ60Ni, Ni concentration, Sm/Yb (normalized by post-Archean Australian shale, PAAS), and δ34S of pyrite concretions in the upper Nantuo Formation. The δ34S values are from Lang et. al.7. DST here refers to Doushantuo Formation.
