Rock 6 was collected from the only rock outcrop observed on the dive.
It was found partially buried in the sediment, with a huge (.75 m tall) bamboo
coral growing on its surface. A piece of the outcrop was broken off the edge
(left in this view) by the sub's mechanical arm.

Digital still image from JSLII Dive 3464, Popenoe Coral Mounds, Blake Plateau (2567 ft).