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Geologists revisit the Great Oxygenation Event
Date:8/19/2010

hen they were first deposited.

"The redox indicators for the Amazonian sediments suggest that they were deposited under anoxic, sulfate-poor conditions, but we know they were deposited in well-oxygenated, sulfate-rich marine waters," Fike writes.

It is as if the murderer had deliberately removed cigar ash and substituted cigarette ash at the scene of the crime.

"Much work remains ahead of us before we can have a true sense of the three-dimensional redox structure of the oceans and how it varied through time," Fike concludes.


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Contact: Diana Lutz
dlutz@wustl.edu
314-935-5272
Washington University in St. Louis
Source:Eurekalert  

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