Fig. 3.

Generalized Changshingian to Anisian carbonate carbon isotopic composition from South China. Bed thickness and number, carbonate carbon isotopic composition, weighted mean ²⁰⁶Pb/²³⁸U dates, and extinction interval (gray) within Fig. 1, Inset from this study and Cao et al. (11). Remainder of carbonate carbon isotopic composition from Payne et al. (52) and geochronology from Galfetti et al. (54). Permian and Triassic conodont zones from Ogg et al. (63). Stage/substage names are global standard chronostratigraphic units used by the International Commission on Stratigraphy.