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From: National Science Foundation Update <nsf-update@xxxxxxx>
Date: Thu, 29 Oct 2009 16:04:08 -0500 (CDT)
Subject: Ancient Ocean Oxygen Production Began 100 Million Years Earlier than Thought
Ancient Ocean Oxygen Production Began 100 Million Years Earlier than Thought
Scientists widely accept that around 2.4 billion years ago, the Earth's atmosphere underwent a dramatic change when oxygen levels rose sharply.
Called the "Great Oxidation Event" (GOE), the oxygen spike marks an important milestone in Earth's history, the transformation from an oxygen-poor atmosphere to an oxygen-rich one, paving the way for complex life to develop.
Two questions that remain unresolved in studies of the early Earth are when oxygen production via ...
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