Extended Data Fig. 9: Trends of Corg/Ptotal for oxic marine siliciclastic sediments and model results from 470 to 430 Ma.
From: Carbon/phosphorus burial ratio reveals a rapid spread of land plants during the Late Ordovician
(a) Bin average plot of Corg/Ptotal for oxic marine siliciclastic sediments, with a bin duration of 0.5 Myr. Grey lines with caps indicate ±1 SD. Histograms illustrate the number of observations in each bin. The sample sizes refer to the number of independent siliciclastic samples. (b) Carbon isotopes of carbonates56,84. Evolution of land plant relative abundance calculated using the above bin average results of Corg/Ptotal (c) and estimated impact of the evolution of land plants on the strength of weathering (d), atmospheric pCO2 (e) and pO2 (f) levels, and carbon isotopes (g) calculated using the COPSE model9. See Methods for the detailed description of this simulation. Grey-shaded regions in c–g indicate the density plot derived from the Monte Carlo analysis with a bin duration of 1 Myr.
