Supplemental Material: Revised onset age of magnetochron M0r: Chronostratigraphic and geologic implications

Text S1: U-Pb, 40Ar/39Ar, and Bayesian modeling analytical methods. Table S1: Summary of radioisotopic ages from Qingshan Group, Jiaolai Basin, China. Table S2: Summary of ages determined for Barremian-Aptian boundary and chron M0r. Tables S3, S4, and S5: Complete U-Pb CA-ID-IRMS, CA-ID-TIMS, and 40Ar/39Ar data from three different laboratories.