IMI30 sidescan and phase bathymetry data (version 2), Guayamas Basin, Gulf of California, Atlantis cruise AT15-54 (2009)

Towed IMI-30 sidescan and phase bathymetry data (version 2) for the Guayamas Basin, Gulf of California, collected in 2009 during Atlantis cruise AT15-54 (investigator Dan Lizarralde). Bathymetry values have undergone basic cleaning to remove outliers. These data files were generated by the Hawaii Mapping Research Group (HMRG) and are in the HMRG Bathymetry/Sidescan (BS) format. The data files were acquired as part of the project called Off-Axis Sills of Guaymas Basin: Implications for Thermogenic-Carbon Flux of a Sedimented Rift Basin, with funding provided by NSF grant OCE07-51901.