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Comment on "Iron Isotope Constraints on the Archean and Paleoproterozoic Ocean Redox State"

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Science  13 Jan 2006:
Vol. 311, Issue 5758, pp. 177
DOI: 10.1126/science.1118221

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Abstract

Rouxel et al. (Reports, 18 February 2005, p. 1088) argued that changes in the iron isotopic composition of sedimentary sulfides reflect changes in the oxidation state of the atmosphere-ocean system between 2.3 and 1.8 million years ago. We show that misinterpretations of the origins of these minerals undermine their conclusions.

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