Figure 4. Bathymetry of the Eastern Manus Basin from multibeam data compiled by Institut Francais de Reserche pour l'Exploration de la Mer (IFREMER). The southeast-trending Djaul transform is conspicuous. The northeast-trending deep on the western side is a failed spreading segment. The PACMANUS site lies at the crest of a northeast-trending ridge of dacite (Pual Ridge).