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![Pacific Ring of Fire Expedition expl0081.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_expl0081.jpg?itok=j8pxr0vQ)
Description
Pacific Ring of Fire Expedition. A contact between the lower basaltic andupper felsic ash units in the wall of the West Rota caldera.The outcrop is approximately 2 meters tall. (Image credit: Pacific Ring of Fire 2004 Expedition. NOAA Office of Ocean Exploration; Dr. Bob Embley, NOAA PMEL, Chief Scientist)