Isolated patches of black-coated bedrock were also found on this wall. Many overhangs occur which offer refugia to some fish. In many places a rugged, rubbly look is exhibited in the bedrock. Samples were hard to come by, but some were broken from the outcrop. The top of the upper terrace was reached at 437 m where a smooth and highly fractured bedrock surface exists.
Fractures crisscross the surface and many pits have formed along the fractures.
Dive 314 started at a depth of 570 m where smooth but fractured hard grainstone or sandstone outcrop was found. Many small erosional pinnacles were rising above an otherwise smooth bedrock surface. In many place black fracture fillings and bedding were observed and sampled. Most of the wall of this terrace was smooth and somewhat fluted, but did not resemble all of the features observed in the lower terrace wall. At the top of the upper terrace, at 461 m water depth, the bedrock was very smooth with little overhangs, slabs or other surfaces occur.