Slow-moving super-eruptions still travel great distances

When Hollywood movies depict the destruction unleashed by volcanic eruptions, they usually focus on red-hot lava, but even more dangerous are pyroclastic flows: mixtures of rocky debris and searing hot ash and gas that move as fast as 700 kilometers per hour and can bulldoze, incinerate and suffocate anything in their paths. In a new study looking at pyroclastic flow deposits associated with the Silver Creek Caldera in the southwestern U.S., researchers have found that not all pyroclastic flows are so swift. Dense, slow-moving flows can still wreak havoc over vast distances.

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Mary Caperton Morton

Mary Caperton Morton

Morton (https://theblondecoyote.com/) is a freelance science and travel writer based in Big Sky, Mont., and an EARTH roving correspondent.  

Wednesday, June 29, 2016 - 06:00