Extended Data Fig. 6: Evolution of the Corg/Ptotal ratio and the proportion of terrigenous organic carbon in oxic marine environments from 600 Ma to present.
From: Carbon/phosphorus burial ratio reveals a rapid spread of land plants during the Late Ordovician
(a) Corg/Ptotal ratio for all siliciclastic sediments. The number in the top left corner of the figure represents the original sample count. Blue curves and shadings indicate the bin-averaged Corg/Ptotal ratios and their 2 weighted standard deviation (2σ), which were generated through Monte Carlo analysis with weighted bootstrap resampling. Light and dark gray dots represent data points and outliers. Purple dots show the data measured in this study. (b) Proportion of terrigenous organic carbon (OC) in total marine sedimentary organic carbon. See Extended Data Fig. 1 for the proportion of terrigenous OC in oxic marine conditions. Yellow-shaded regions in a–b indicate the interval of 455–445 Ma.
