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Extinct Chimney

A 14-meter-high extinct hydrothermal vent chimney was discovered on Dive 7 at Fina Nagu Caldera A on top of a volcanic dome. This hydrothermal chimney was probably once a high-temperature black smoker, built by hot, chemical-rich fluids created by seawater percolating downward and interacting with hot subsurface rocks above the dome’s magma chamber.

Video courtesy of the NOAA Office of Ocean Exploration and Research, 2016 Deepwater Exploration of the Marianas.

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Related Links

2016 Deepwater Exploration of the Marianas

NOAA Ship Okeanos Explorer