The crater floor at Nikko has many sulfur chimneys, both active and inactive. Scientists were able to deduce that this one grew by repeated overflows of molten sulfur, which created the extraordinary embellishments on its sides. Video courtesy of Submarine Ring of Fire 2006 Exploration, NOAA Vents Program.

Related Links

Submarine Ring of Fire 2006

Submarine Ring of Fire 2006: May 12 Log

NOAA Ocean Explorer Gallery