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Thursday, November 23, 2017

Mysterious deep-Earth seismic signature explained

http://ift.tt/eA8V8J New research on oxygen and iron chemistry under the extreme conditions found deep inside the Earth could explain a longstanding seismic mystery called ultralow velocity zones. The findings could have far-reaching implications on our understanding of Earth's geologic history, including life-altering events such as the Great Oxygenation Event, which occurred 2.4 billion years ago.

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