Processed multi-beam bathymetry grid from RRS James Cook expedition JC228, Guatemala Basin (2022-2023)

Multi-beam swath bathymetry data were collected with a hull-mounted Kongsberg EM122 echosounder during RRS James Cook expedition JC228 (December 2022 to January 2023) in the Guatemala Basin region of the North Pacific Ocean. The data were edited using Caris HIPS software and gridded at 50 m spacing in a WGS84 Mercator projection. They were exported as longitude-latitude-depth triples. The aim was to sample fast-spreading ocean lithosphere of the northern Cocos Plate from its formation to subduction in the Mid-America Trench. This work aimed to investigate the evolution of oceanic lithosphere as well as provide essential site survey information for two IODP Proposals: the flagship MoHole to Mantle initiative (M2M; IODP-805MDP) and the Bend Fault Serpentinization experiment (approved IODP-876Pre). The work was undertaken by scientists at the University of Southampton, UK in collaboration with GEOMAR Helmholtz Centre for Ocean Research, Germany, funded as part of NERC grant 'From Ridge to Trench, MoHole to Bend-Faults', grant reference NE/M021246/1.