Rapid expansion of oceanic anoxia immediately before the end-Permian mass extinction.

@article{Brennecka2011RapidEO,
  title={Rapid expansion of oceanic anoxia immediately before the end-Permian mass extinction.},
  author={Gregory A. Brennecka and Achim D. Herrmann and Thomas J Algeo and Ariel D Anbar},
  journal={Proceedings of the National Academy of Sciences of the United States of America},
  year={2011},
  volume={108 43},
  pages={17631-4}
}
Periods of oceanic anoxia have had a major influence on the evolutionary history of Earth and are often contemporaneous with mass extinction events. Changes in global (as opposed to local) redox conditions can be potentially evaluated using U system proxies. The intensity and timing of oceanic redox changes associated with the end-Permian extinction horizon (EH) were assessed from variations in (238)U/(235)U (δ(238)U) and Th/U ratios in a carbonate section at Dawen in southern China. The EH is… CONTINUE READING
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