Statistical analysis of iron geochemical data suggests limited late Proterozoic oxygenation.
Sperling, Erik A. 1,2,+; Wolock, Charles J. 3; Morgan, Alex S. 1; Gill, Benjamin C. 4; Kunzmann, Marcus 5; Halverson, Galen P. 5; Macdonald, Francis A. 1; Knoll, Andrew H. 1,3; Johnston, David T. 1
[Letter] Nature. 523(7561):451-454, July 23, 2015.

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