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Volcanoes may not be fed by magma 'mushrooms'

Volcanoes may not be fed by magma 'mushrooms'

作者:毋版些  时间:2017-09-08 07:01:02  人气:

Video: A new simulation shows that magma rising under the surface of a volcano may not be mushroom-shaped THE plumes of hot magma that fuel the volcanism of “hotspots” like Hawaii and Iceland have long been thought to be efficient conduits of Earth’s fiery contents. Yet it seems they can be rather lacklustre on their way to the surface. We traditionally picture the plumes of hot magma that rise through the mantle as mushroom-shaped with a thin stalk feeding a bulbous head, or hotspot, beneath the crust. However, seismic imaging in Iceland reveals a patchy structure without a stalk,