be part of the foreland basin although active structures are observed as far out as the Zagros Frontal Fault. Kirkuk embayment In northern Iraq, the Zagros FTB is relatively narrow and this area is referred to as the Kirkuk embayment. This part of the fold belt lacks an effective basal Hormuz salt detachment. Lorestan domain The Lorestan (or Lurestan) domain forms the northerly of the two main salients in the Zagros FTB. The structural style of the simply folded zone is interpreted here to be dominated by detachment folding with some degree of disharmonic folding (folding of differing wavelengths at different structural levels). The disharmony occurs between a deeper layer bounded by the basal and Dashtak Formation décollement levels and shallower one between the Dashtak décollement and the surface. There is also evidence of a thick-skinned element to the deformation. The lack of Hormuz salt exposed at the surface makes the nature of the basal detachment less certain than in the Fars domain, but the presence of this salt layer is inferred from the observation that the taper angle (the angle between the basal detachment and the current topographic slope) is identical to that where the salt is proven further south. Dezful embayment Between the two main salients of the Zagros FTB, the Dezful embayment developed in an area that lacked an effective basal Hormuz salt detachment, resulting in a steeper topographic slope of 2°, compared to 1° for both the Lorestan and Fars domains. During the Miocene, this area became a depocentre in which locally thick Gachsaran salt was deposited. The presence of locally thick Gachsaran salt has caused disharmonic folding between the sequences above and below that layer. Fars domain The Fars salient forms the southeastern end of the Zagros FTB. This area is underlain by a thick Hormuz salt layer that comes to the surface in several places where it extrudes from the crests of anticlines, forming salt glaciers, although it may be missing over the Fars platform, a continuation of an area of the foreland in which the salt layer is not present. Kazerun fault system This dextral fault system transfers some of the dextral displacement along the Main Recent Fault onto thrust faults and folds of the Fars domain as the relative motion changes from strongly oblique to near orthogonal. It also forms the effective southeastern boundary to the Dezful embayment. In detail the Kazerun