A deep-sea surveying vehicle captured these images of fine-grained volcanic shards blanketing the seafloor over a 4-square-mile area on the Gakkel Ridge beneath the Arctic Ocean. Grains like these are usually ejected by violent volcanic explosions and settle eventually through the water onto the seafloor.
(Photo courtesy of Rob Reves-Sohn, Hanumant Singh, Tim Shank, Susan Humphris, and William Lange of WHOI, and the AGAVE science team)[back]
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