Mixtite deposits form extensive outcrops in the Pan-African Damara orogenic belt of Namibia. They occur at two different stratigraphic levels in the lower part of the Upper Proterozoic Damara Sequence (South African Committee for Stratigraphy 1980; Kröner, 1981). The older Varianto mixtite is confined to the northern margin of the fold belt. No evidence indicating a glacigenic origin has been found, but on the southern foreland of the fold belt two, possibly coeval, mixtite deposits (Court and Blaubeker Formation) show fair evidence of such an origin. The younger Chuos mixtitesoccur in three separate zones of the belt. All these mixtites have been interpreted as glacigenic sediments, and the Chuos Formation has been used as a stratigraphic marker for the correlation between different parts of the fold belt. The present investigation shows that: (1) The mixtite deposits show no features indicating a glacial origin; (2) The sedimentary features indicate deposition by gravity-flow processes; (3) turbidites are in several areas closely associated with and even interbedded in the mixtite deposits; (4) mixtite deposition is in some areas not confined to the Chuos Formation proper, but began at lower stratigraphic levels or persisted to a higher level; (5) in some areas calcareous or dolomitic sediments are interbedded in mixtite, or mixtites are interbedded in such formations. The mixtites of the Chuos Formation are interpreted as various kinds of submarine gravity-flows (slump breccias, mass-flow, slurry, grain-flows, turbidites) which were probably triggered by tectonic activity during a stage of differential subsidence that affected the whole geosyncline, but was concentrated in three rift zones. Under this assumption the majority of the mixtites may have been deposited during a limited time spin. A different model assuming synorogenic deposition of the "pebbly schist" mixtites of the Southern Margin Zone is briefly discussed. It is concluded that the mixtite deposits are not of glacial origin and can therefore not be regarded as reliable chronostratigraphic markers for correlations between the different facies domains of the Damara sequence nor for correlation with other Upper Proterozoic sequences (e.g. Gariep belt, Katanga belt); such a correlation might, nevertheless, exist, if the extensive gravity-flows should have been caused by eustatic changes of the sealevel during a time of widespread glaciation on other parts of the globe. In this case local mountain glaciers might have contributed material to some of the Chuos mixtites.