2 billion-year-old sea salt captures Earth's 'Great Oxidation'
An international research team led by a Princeton University scientist has found that the rise in oxygen that occurred about 2.3 billion years ago (Paleoproterozoic era) — known as the Great Oxidation Event — was much more substantial than previously indicated. "Instead of a trickle, it was more like a firehose. It was a major change in the production of oxygen," said Dr. Clara Blättler, a postdoctoral researcher in the Department of Geosciences at Princeton University.
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