Limestone boulders that may have been exposed on the surface and eroded/weathered at one point, as seen during Dive 07 of the third Voyage to the Ridge expedition.
Limestone Boulders
Image courtesy of NOAA Ocean Exploration, Voyage to the Ridge 2022. Download larger version (jpg, 1 MB).

Limestone boulders that may have been exposed on the surface and eroded/weathered at one point, as seen during Dive 07 of the third Voyage to the Ridge expedition.