The Late Proterozoic Kuiseb Formation within the western Khomas Trough of the southern Damara Orogen comprises a considerable thickness of intercalated metamorphic psammites (metagreywackes) and pelites. Prominent lithological markers of great lateral extent are represented by (1) a graphitic schist, up to 60 m thick, in the centre of the Khomas Trough and (2) the metabasic rocks within the Matchless Amphibolite Belt in the south. Minor lithologies are thin graphitic schists, quartzitic schists, calc-silicate-rich units, scapolite-bearing schists and minor amphibolite'. A prominent linear zone of discordant scapolite replacement occurs in the northern part of the Khomas Trough. Keywords: Namibia, Namib Desert, Khomas formation, Kuiseb River, palaeoenvironment, geomorphology, earth science, lithology, petrology.