A Huge Subterranean ‘Tree’ Is Moving Magma to Earth’s Surface


Cover picture for the articleRéunion, a French island in the western Indian Ocean, is like a marshmallow hovering above the business end of a blowtorch. It sits above one of Earth’s mantle plumes—a tower of superheated rock that ascends from the deep mantle and flambées the bases of tectonic plates, the jigsaw pieces that make...

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