Deep within the Earth’s rocky mantle lies oceans’ worth of water locked up in a type of mineral called ringwoodite, new research shows.
The results of the study will help scientists understand Earth’s water cycle, and how plate tectonics moves water between the surface of the planet and interior reservoirs, researchers say.
The Earth’s mantle is the hot, rocky layer between the planet’s core and crust. Scientists have long suspected that the mantle’s so-called transition zone, which sits between the upper and lower mantle layers 255 to 410 miles (410 to 660 kilometers) below Earth’s surface, could contain water trapped in rare minerals. However, direct evidence for this water has been lacking, until now.
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