Hydrothermal chimney (white; approximately one meter tall) on top of hydrothermal mound (dark; ~10 meters tall); volcanic rocks in foreground.

Hydrothermal chimney (white; approximately one meter tall) on top of hydrothermal mound (dark; ~10 meters tall); volcanic rocks in foreground. Image courtesy of the NOAA Office of Ocean Exploration and Research.

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2016 Deepwater Exploration of the Marianas

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