Bathymetric image of a crater located on the eastern Ridge off Maro Reef. The crater is six kilometers (3.1 nautical miles) across and over three kilometers deep, with walls up to 800 meters high. Sonar and sample data collected during this cruise may provide insights into the currently unknown origin of the crater.

Bathymetric image of a crater located on the eastern ridge off Maro Reef. The crater is six kilometers (3.1 nautical miles) across and over three kilometers deep, with walls up to 800 meters high. Sonar and sample data collected during this cruise may provide insights into the currently unknown origin of the crater. Image courtesy of the NOAA Office of Ocean Exploration and Research, 2015 Hohonu Moana.

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