We examine the structure and evolution of the Ghab basin that formed on the active, yet poorly understood, norhtern segment of the Dead Sea transform fault system. The basin formed in Plio-Quaternary time at a complex step-over zone on the fault. Subsidence occurred along cross-basin and transform-parallel faults in two asymmetric depocentres. The larger depocentre in the south of the basin is asymmetric towards the east, the margin along which most active transform displacement apparently occurs. The Syrian Coastal Ranges, located directly west ot the Ghab basin, are a consequence of Late Cretaceous and Cenozoic regional compression, healily modified by the Dead Sea fault system and Ghab basin formation. We prefer a model whereby thh Dead Sea fault system in norhtwest Syria developed in Plio-Quaternary time, consistent with previously proposed models of two-phase Dead Sea fault system movement and Red Sea srpreading.