It is this shoving of the mantle that created the volcanoes of the Mediterranean, they said.

There one plate dives under the edge of another and is reincorporated into the mantle.

If it does, a network of detectors could give us a more detailed picture of the thermal structure of the mantle.

Without the "oxygen elevator" in its mantle the earth would probably be a barren planet hostile to life.

Nearing the earth's surface the pressure in the mantle becomes too weak to maintain the majorite, which then decomposes.