They find, at a depth of 660 km, an amount of water equivalent to six times that of all the oceans on Earth

by time news

Between 410 and 660 km below our feet, a geological ‘boundary’ called the ‘transition zone’ separates the lower mantle of the Earth from the upper mantle. At that enormous depth, the immense pressures (up to 23,000 bars) make the ore olivino

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