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![Pacific Ring of Fire Expedition expl0044.jpg Pacific Ring of Fire Expedition](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_expl0044.jpg?itok=rEOMH_yz)
Description
Pacific Ring of Fire Expedition. Columnar jointing in pumice boulder on thetop of West Rota volcano. Note crinoid growing on the surface. Theimage is approximately 0.5 meters [18 in] high. (Image credit: Pacific Ring of Fire 2004 Expedition. NOAA Office of Ocean Exploration; Dr. Bob Embley, NOAA PMEL, Chief Scientist)