The Klein Aub area in SWA/Namibia exposes Late Proterozoioc metasediments and metavolcanics of the Sinclair Sequence, which rest on a Lower to Middle Proterozoic basement. The basement is block faulted and, in the vicinity of Klein Aub, forms a major basement high which supplied sediment into a fault bounded basin. Major faults tapped felsic and minor mafic magma to produce the volcanics of the Nückopf Formation. Continued block faulting resulted in the development of narrow, deep graben sub-basins in which the sediments and volcanics of the Grauwater Formation were deposited. Major basement uplift accompanied deposition of the Doornpoort Formation, a widespread unit of red-bed alluvial fan conglomerates grading basinwards into sheet flood, braided stream and aeolian sediments. Cessation of faulting was followed by the deposition of the Kagas Member of the Klein Aub Formation in a shallow lacustrine environment.