Columnar jointing in pumice boulder on the top of West Rota volcano.


Columnar jointing in a pumice boulder on the top of West Rota volcano. Note the crinoid growing on the surface. The rock section shown is approximately 0.5 m (18 in) high. Image courtesy of Submarine Ring of Fire 2004 Exploration, NOAA Vents Program.

 

Related Links

Submarine Ring of Fire 2004

Submarine Ring of Fire 2004: April 4 Log

NOAA Ocean Explorer Gallery

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