Fig. 1: Guadalupian-Lopingian transitional interval chronology, stable isotope, and lipid biomarker stratigraphic records from Shangsi Section, China.
From: Atmospheric CO2 drawdown during the Emeishan flood basalt volcanism
a Chrono- and lithostratigraphy. b Geological and biological events from refs. 12,13,14. c Carbonate carbon isotopic compositions (δ13Ccarb, blue squares). d Bulk organic carbon isotopic compositions (δ13Corg) together with %TOC (blue circles, size of symbol proportional to %). e Phytane carbon isotopic compositions (δ13Cphy, blue circles). Horizontal error bars represent 1σ of the mean (n = 2). f εp (blue circles) calculated from δ13Cphy and δ13C of dissolved CO2 determined from (c). Shaded gray areas represent 68% (dark gray) and 95% (light gray) confidence intervals of εp calculation based on Monte Carlo simulations with 10,000 times (See Methods). Black dashed line represents the LOESS smoothing function (See Methods). Data in Supplementary Table 1. Fm Formation, W Wordian.
