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• n  the upper part of the mantle

News & Articles

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• Earth Core Probe As Controlled 'China Syndrome'
  Visions of languorous Jules Verne-like journeys to inner earth have long been relegated to science fiction fantasy. But that doesn’t mean that the idea of “in situ” access to earth’s upper mantle --- 50 to 100 kms below the surface --- has disappeared altogether.
  July 31, 2013 - Forbes