Fig. 27

Seafloor images from the ROPOS ROV and Shinkai 6500 submersible. Panels a to c are all vertical ROPOS images of the seafloor on the wave-cut platform. The outcrops are all pitted due to preferential erosion of plagioclase and olivine, with white bioclastic sand filling the pits between pyroxene grains. a Dive 437 image showing heavily weathered and pitted outcrop of flat-lying amphibolite mylonite. b Dive 430 image showing a pegmatite crosscutting a relatively undeformed gabbro enclave with two sub-orthogonal amphibole vein sets on weathered wave-cut outcrops emerging from indurated bioclastic beach sand. c Dive 433 image of sub-parallel dikes crosscutting intercalated gabbros in a relatively undeformed gabbro enclave on weathered sub-horizontal outcrop. d Shinkai 6500 Dive 648 showing the shingle-structured, slickensided and down-dip slickenlined, east-dipping normal fault surface on the lower normal fault on the eastern flank of Atlantis Bank