The 2005 eruption of the Galápagos volcano Sierra Negra partly filled the caldera with 160 million cubic meters of evolved basalt. Sierra Negra lies close to the core of the mantle plume imaged by ... more 
The 2005 eruption of the Galápagos volcano Sierra Negra partly filled the caldera with 160 million cubic meters of evolved basalt. Sierra Negra lies close to the core of the mantle plume imaged by Mooney's team. less 
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LiveScience.com | Photo By Douglas Toomey
Mon, Jan 27, 2014 9:20 AM EST