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Water stored in the mantle for millions of years may be linked to continental volcanism
The mantle transition zone (MTZ), which occurs 410–670 kilometers below Earth's surface, may store several oceans' worth of water. This water, which is carried to such depths by subducting tectonic ...
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Study identifies superionic iron hydride as key to ultralow-velocity zones at Earth's core-mantle boundary
Smaller ultralow-velocity zones (ULVZs) have been detected in these regions, characterized by significantly lower seismic wave speeds and higher densities compared to the surrounding mantle.