Evidence for Iron-Rich Ancient Ocean Changes View of Earth's Early History

Evidence for Iron-Rich Ancient Ocean Changes View of Earth's Early History
Wed, 07 Sep 2011 12:35:00 -0500

Over the last half-billion years, the ocean mostly has been full of oxygen and teeming with animal life. But earlier, before animals evolved, oxygen was harder to come by.

Now a new study, led by researchers at the University of California, Riverside (UCR), reveals that the ancient deep ocean was not only devoid of oxygen but also rich in iron, a key biological nutrient for nearly a billion years longer than previously thought--right through a key evolutionary interval that culminated ...

More at http://www.nsf.gov/news/news_summ.jsp?cntn_id=121307&WT.mc_id=USNSF_51&WT.mc_ev=click

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