Geology: Earth's deep water reservoir

@article{Keppler2014GeologyED,
  title={Geology: Earth's deep water reservoir},
  author={Hans Georg Keppler},
  journal={Nature},
  year={2014},
  volume={507},
  pages={174-175}
}
A tiny sample of a mineral included in a diamond confirms predictions from high-pressure laboratory experiments that a water reservoir comparable in size to all the oceans combined is hidden deep in Earth's mantle. See Letter p.221 
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