The Chameis Sub-terrane is the uppermost tectono-stratigraphic unit of the allochthonous Marmora Terrane which represents the internal part of the Pan-African Gariep orogenic belt. Based on new field observations and geochemical data, a stratigraphic subdivision of this sub-terrane is proposed, with the term Chameis Group covering all Pan-African stratigraphic units in this sub-terrane. A mainly volcanic Dernburg Formation and a metasedimentary Bogenfels Formation are distinguished in the lower and upper portions, respectively, of the Chameis Group. The former contains a diamictite (Chameis Gate Member) which can be correlated with the Numees Formation in the para-autochthonous Port Nolloth Zone representing the external zone of the belt. Also distinguished within the Dernburg Formation is a dolomitic unit which is derived from stromatolitic reef mounds and from former evaporites that were most likely deposited in an atoll setting (Sholtzberg Member). The Bogenfels Formation is similar to the Holgat Formation in the Port Nolloth Zone, with the calcareous Dreimaster Member at its base correlating with the Bloeddrif Member in the Holgat Formation. The dominantly mafic volcanic Dernburg Formation hosts numerous, largely tectonically dismembered gabbro bodies (Bakers Bay Suite).