Geochemical and isotopic data of Ordovician-Silurian transition samples from South China

Table S1 provides total organic carbon (TOC), total sulfur (TS), Hg concentration and Hg isotopic compositions for the Wanhe (WH) section, South China. Table S2 lists TOC, TS, and Hg concentration for the Huangying (HY) section, South China. Table S3 includes TOC, TS, Hg concentration and Hg isotopic compositions for the Qiliao (QL) section, South China. Table S4 provides TOC, TS, Hg concentration and Hg isotopic compositions for the Tianba (TB) section, South China. Table S5 lists volcanic ash thickness, TOC, TS, Hg concentration and THg/TOC, THg/TS ratios for the WH, HY, QL, Shuanghe (SH), and TB sections, South China.