Fig. 1
Kazput Formation barite sulfur and oxygen isotope data from this study are shown alongside compilations of time series data and temporal estimates of sulfur fluxes and atmospheric O2. In further detail, shown are a pyrite and sulfate ∆33S data, b δ18O data of sedimentary carbonate, chert, shale, and sulfate and c the evolution of O2 showing maximum ranges67 with ratios of sulfur influxes to the ocean of total versus present day and weathering versus total flux61. The shaded regions represent intervals of glaciations of possibly global significance. The Turee Creek pyrite data in a are from16, and Kazput carbonate data in b are from33. Data sources and details are provided in Supplementary Note 1, while source data are provided in a Source Data file
