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Bill Chadwick has seen things you wouldn’t believe. He’s observed an undersea volcano oozing carbon dioxide, which turned into an eerie, milky liquid under intense water pressure. “That was crazy,” Chadwick tells Vox. He witnessed another eject a toxic plume that was killing and stunning fish and squid, which rained down to be eaten by crabs, worms, and shrimp.
Chadwick, a researcher at Oregon State University’s Hatfield Marine Science Center, has spent much of his career exploring the ocean’s depths as a seafloor geologist. He says nothing is quite as wondrous as an underwater volcano.
One of Chadwick’s all-time favorite expeditions was to the Mariana Arc, a chain of mostly submerged volcanoes south of Japan. Between 2004 and 2010, remotely operated vehicles (ROVs) glided around this previously unexplored realm, surveying its volcanic cathedrals — some nearly breaking the waves, some concealed a mile beneath. The eruption of an underwater Arc volcano known as NW Rota-1 — the same one emitting the plume that knocked out fish and squid — marked the first time a deep-sea volcano had been seen spewing molten rock.
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