Pacific Ring of Fire Expedition. The vertical column in the center of the image, called a dike, rises from below sea level to the pinnacle at the top of the ridge. Interlaid massive lavas (darker horizontal bands) and ash-rich lava units (reddish) are also exposed on the islets of Maug.

Image ID: expl0060, Voyage To Inner Space - Exploring the Seas With NOAA Collect
Location: Mariana Arc region, Western Pacific Ocean
Photo Date: 2004 April
Credit: Pacific Ring of Fire 2004 Expedition. NOAA Office of Ocean Exploration; Dr. Bob Embley, NOAA PMEL, Chief Scientist

• High Resolution Photo Available