The continental sediments of the Karoo Sequence in the Huab Basin, northwestern Damaraland, Namibia, are interpreted as marginal equivalents of a more than 2000 m thick succession of Gondwana beds that have been accumulated in the Parana Basin of South America. The sediments, which attain a maximum thickness of 250 m, reflect a change from cold and nival to warm and arid climates. In the Huab Basin, the succession begins with tillites and periglacial diamictites and rhythmites (depositional units 1 and 2). These are covered by fluvial sandstones and coal deposited in a cold tundra-like environment (depositional unit 3). The succeeding fluvial sandstones and calcareous soils (depositional unit 4) cover a wide area and indicate a moderate, dry climate. The following, probably lacustrine, succession includes sediments with autochthonous carbonates (stromatolites, oolites), a widespread Mesosaurus bone bed and various marginal environments indicating warm climatic conditions (depositional units 5 and 6). The aqueous sequence is terminated by red beds of the Gai-as Formation (depositional unit 7). After a phase of erosion and non-deposition, continental sedimentation revived with fluvial deposits (depositional unit 8) and terminated with aeolian sandstones in a desert environment (Etjo Sandstone Formation, depositional unit 9). While the Huab sediments are broadly correlated with those of the Parana and Karoo basins, age determinations from fossils suggest that units 1 and 2 are Permo-Carboniferous and that units 3 to 7 are Permian. The exact age of the Mesozoic units 8 and 9 is uncertain.