The age of 1094 +18 -20 m.y. of the Oorlogsende Porphyry (Area 2120) supports correlation with the Nückopf Formation, an equivalent of the Sinclair Sequence. The rocks form a tectonic sliver, and their position suggests that the southern Damara thrust belt continues into the Epukiro area. Dependent on whether the Kgwebe formation in Botswana is considered coeval with either the Eskadron Formation (Witvlei area, Gobabis District) or with the Nückopf Formation of central South West Africa/Namibia, the correlation of the Ghanzi Group in Botswana with only the Nosib Group or with both the Eskadron Formation and the Nosib Group of South West Africa/Namibia is implied.