Local algalaminites in the pre-Chuos Saturn Formation suggests deposition of parts of this unit in shallow water south of the northern boundary fault of the deep Nosib-age rift of the Northern Zone but mass-flow carbonate layers with stromatolitic reef debris and sandstone layers with transported oolites interbedded with the Chuos diamictites point to much deeper water during Chuos times. Mass flows and rhythmites in the Tsumeb Subgroup rocks on the Fransfontein Ridge are indicative of slope deposition that passed southwards into numerous mass flows and rhythmites of the coeval Karibib Formation in much deeper water of the deepening Northern Zone rift. Quartzites interbedded with the schists of the Kuiseb Formation west of Khorixas show evidence of small-scale regressions and transgressions. D1 was intense in the Kaoko Belt and folded the northern margin of the Damara Belt. Erosional debris was deposited in intramontane valleys along this margin as the molasse of the Mulden Group. Intense D2 deformation, however, folded the Swakop Group succession into a series of NE-SW to ENE-WSW folds which were then thrust up and over the northern boundary fault of the deep Nosib-age rift of the Northern Zone and onto the Mulden molasse as a series of thrusts successively overstepping each other from west to east to form the front of the Khorixas-Gaseneirob Thrust, the floor thrust of a duplex system of thrusts. Nappes of Swakop Group and deep-water Otavi Group rocks were thrust onto the Mulden phyllites. D2 produced the E-W foliation in the Mulden phyllites and caused north-verging folding and thrusting in the Otavi rocks of the Fransfontein Ridge. In the Kuiseb schists west of Khorixas, zones of intense beddingparallel D2 deformation and quartzite disruption suggest the presence of several thrusts within the schists. D2 stretching lineations point to a thrust transport direction between 320° and 360° (magnetic). Keywords: Otavi Group, Swakop Group, Mulden Group, Fransfontein Ridge, Khorixas-Gaseneirob Thrust, nappes, thrust duplex, stretching lineations, mass flows, grainstone turbidites.