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Earth science

Lower mantle may be rich in silica

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There have been conflicting claims about the composition of Earth's lower mantle. The latest Brillouin-spectroscopy data suggest that this section of the planet's interior may contain more silica than the upper mantle. See Letter p.90

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Correspondence to Ian Jackson.

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Jackson, I. Lower mantle may be rich in silica. Nature 485, 51–52 (2012). https://doi.org/10.1038/485051a

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