The Late Proterozoic Damara Orogen (750-450 Ma) in Namibia forms part of the Pan-African mobile belt system which bisects southern Africa. The Khomas Trough in the inland branch of the orogen comprises thick multiply-deformed metagreywackes and metapelites of the Kuiseb Formation. Minor lithologies are graphite schists, calc-silicates and scapolite schists. The Matchless Amphibolite Member is structurally emplaced within the sequence and contains tholeiitic, mid-ocean ridge-type metavolcanic rocks, including pillow lavas and breccias, as well as ultramafic lithologies and metagabbroic lenses. Pelagic graphite schists, pelitic schists and a marble unit are intercalated within the metabasic rocks. Original sedimentary structures, turbidite facies, the vertical facies distribution of progradational and retrogradational cycles, and the lateral extent of major sedimentary units indicate that psammitic parts of the sedimentary protoliths have been deposited as turbidites on an elongate submarine fan. Geochemical signatures suggest that an active continental margin source to the northeast of the present-day Khomas Trough supplied the vast amounts of clastic sediment. The regional structural pattern is characterized by five phases of deformation with folds verging consistently to the southeast. The structural regime is markedly heterogeneous and is associated with thrusting which developed elongate thrust slices traceable laterally for at least 150 km. Metamorphic index minerals indicate lower to upper amphibolite facies conditions but partial melting occurred in some areas along the northern margin of the Khomas Trough.