Springs Orogenies implies a link between relatively thick sedimentation and long-term lithospheric weakening. This link is also found to be compatible with the thermal effects of a thick sedimentary blanket. Since both events involved significant north-south shortening, deformation is said to have occurred in response to a similarly oriented in-plane regional stress field. The combined effects of both the orogenic events resulted in the emergence of the Musgrave and Arunta Blocks from beneath the Centralian intracratonic basin, which is now represented by the Officer, Amadeus, Ngalia and Georgina Basins. Localisation of strain Deformation was not spatially continuous throughout the Alice Springs Orogeny, but focused at a number of discrete loci, situated along the current structural margins of the preserved basins and in areas of now-exhumed basement. The factors that control distribution of intraplate deformation have been the subject of considerable discussion. Many people believe that the intraplate deformation of the Alice Springs Orogeny is localised by suitably oriented structural weaknesses such as faults. This theory is supported by the observation that many continental interior faults have experienced numerous episodes of reactivation during their history. Although shortening associated with the Alice Springs Orogeny was widespread, there are two major regions affected by significant basement involved deformation: the Redbank Shear Zone and the Officer Basin. Redbank Shear Zone The Redbank Shear Zone in the Arunta Block, is a reverse sense shear zone dipping north at about 45 degrees, and was the major structural feature reactivated during the Alice Springs Orogeny. This shear zone is associated with one of the largest gravity anomalies known from continental interiors. The Redbank Shear Zone also accommodates 25% of the apparent shortening. Seismic and gravity data over the Arunta Inlier have provided a reasonable degree of constraint on the crustal architecture of this province and have demonstrated that the crust-mantle boundary is uplifted by 25 km along the lithospheric-scale Redbank Thrust Zone, and that this offset is sufficient to cause the relative gravity high. The south-directed Redbank Shear Zone accommodated much of the exhumation and led to the unearthing of the Moho. The spectacular Macdonnell Ranges near Alice Springs are made up of Amadeus Basin sediments tilted as a consequence of exhumation associated with the Redbank Shear Zone. Officer Basin The second region occurs along the northern margin of the Officer Basin. In this basin the Alice Springs Orogeny caused reactivation of the Munyarai Thrust which had