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There and back again: Mantle xenon has a story to tell

The Earth has been through a lot of changes in its 4.5 billion year history, including a shift to start incorporating and retaining volatile compounds from the atmosphere in the mantle before spewing them out again through volcanic eruptions.

Mt. Etna spews lava during an eruption as seen from Acireale, near the Sicilian town of Catania, Italy
[Credit: AP/Carmelo Imbesi]This transport could not have begun much before 2.5 billion…

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via The Archaeology News Network, http://archaeologynewsnetwork.blogspot.com/2018/08/there-and-back-again-mantle-xenon-has.html

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