Multibeam sonar bathymetry of a large 20-kilometer-wide submarine slide on the northwest wall of the Puerto Rico Trench.

Multibeam sonar bathymetry of a large 20-kilometer-wide submarine slide on the northwest wall of the Puerto Rico Trench. Image courtesy of NOAA Okeanos Explorer Program, Océano Profundo 2015: Exploring Puerto Rico’s Seamounts, Trenches, and Troughs.

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