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Old 03-19-2014, 01:23 PM   #1903
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A battered diamond that survived a trip from "hell" confirms a long-held theory: Earth's mantle holds an ocean's worth of water.

A diamond from Juína, Brazil, containing a water-rich inclusion of the olivine mineral ringwoodite. Credit: Richard Siemens/University of Alberta

"It's actually the confirmation that there is a very, very large amount of water that's trapped in a really distinct layer in the deep Earth," said Graham Pearson, lead study author and a geochemist at the University of Alberta in Canada. The findings were published today (March 12) in the journal Nature.
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