Map over sampling sites. A UK-1 Stratum-A B UK-1 Stratum-B study areas, both within the UK Seabed Resources UK-1 exploration contract area C OMS Stratum-A study area, in the Ocean Mineral Singapore (OMS) polymetallic nodule exploration contract area D Area of Particular Interest APEI-6. Inset map showing location of Clarion-Clipperton Fracture Zone. Bathymetric survey and sample localities from the AB01 2013 RV Melville survey cruise and AB02 2015 Thomas G. Thompson survey cruise, data courtesy Craig R. Smith (University of Hawaii), UK Seabed Resources Ltd and Seafloor Investigations, LLC.