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Sulfate was a trace constituent of Archean seawater.
Crowe SA, Paris G, Katsev S, Jones C, Kim ST, Zerkle AL, Nomosatryo S, Fowle DA, Adkins JF, Sessions AL, Farquhar J, Canfield DE. Crowe SA, et al. Among authors: zerkle al. Science. 2014 Nov 7;346(6210):735-9. doi: 10.1126/science.1258966. Science. 2014. PMID: 25378621 Free article.
A 200-million-year delay in permanent atmospheric oxygenation.
Poulton SW, Bekker A, Cumming VM, Zerkle AL, Canfield DE, Johnston DT. Poulton SW, et al. Among authors: zerkle al. Nature. 2021 Apr;592(7853):232-236. doi: 10.1038/s41586-021-03393-7. Epub 2021 Mar 29. Nature. 2021. PMID: 33782617 Free article.
The Great Oxidation Event preceded a Paleoproterozoic "snowball Earth".
Warke MR, Di Rocco T, Zerkle AL, Lepland A, Prave AR, Martin AP, Ueno Y, Condon DJ, Claire MW. Warke MR, et al. Among authors: zerkle al. Proc Natl Acad Sci U S A. 2020 Jun 16;117(24):13314-13320. doi: 10.1073/pnas.2003090117. Epub 2020 Jun 1. Proc Natl Acad Sci U S A. 2020. PMID: 32482849 Free PMC article.
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