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Published April 7, 2023 | Published
Journal Article Open

Response to comment on "Reexamination of 2.5-Ga 'whiff' of oxygen interval points to anoxic ocean before GOE"


Sedimentological, textural, and microscale analyses of the Mount McRae Shale revealed a complex postdepositional history, previously unrecognized in bulk geochemical studies. We found that metal enrichments in the shale do not reside with depositional organic carbon, as previously proposed by Anbar et al ., but with late-stage pyrite, compromising claims for a "whiff" of oxygen ~50 million years before the Great Oxygenation Event.

Additional Information

© 2023 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). We thank B. Schoene for editorial management and feedback that helped improve this article. There are no funding sources for this response to the comment. See the work by Slotznick et al. (2) for funding of the original research. Author contributions: S.P.S., J.E.J., B.R., and W.W.F. wrote and revised the response incorporating comments from J.L.K. S.P.S. and J.E.J. drafted the figure incorporating images from T.D.R. All authors contributed to the initial publication through its conceptualization, data development, and/or analysis referenced throughout this response. Data and materials availability: All data needed to evaluate the conclusions in the paper are present in the paper and in the original article (2). The authors declare that they have no competing interests.

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August 22, 2023
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