Eukaryotes expansion into non-marine habitats prohibited by nitrogen limitation during the mid-Proterozoic

Total organic carbon (TOC, ppm), total nitrogen (TN, ppm), Al2O3 (wt%), P (ppm), Mo (ppm), δ13C (‰), δ15N (‰) and related ratios of samples from the Dagushi, Bingmagou, Baicaoping, and Puyu Formations are shown in the Table. Samples were collected along four formations from the Henan Province, China.