The Ganigobis Formation is a Late Carboniferous (Gzhelian) to Early Permian (Artinskian) geologic formation of the Dwyka Group in the ǁKaras Region of southeastern Namibia and the Northern Cape of South Africa. The widespread formation was deposited in the Aranos and Karoo Basins of southern Africa.

The Ganigobis Formation is an extensive unit with a maximum thickness of 240 metres (790 ft) evidenced in the Vreda borehole. The conglomerates, sandstones, shales and tuff of the formation were deposited in a glacio-lacustrine to marine environment. The Ganigobis Formation provides fossil fish as well as bivalves (e.g. Nuculopsis), gastropods (e.g. Peruvispira), scyphozoa (e.g. Conularia), crinoid stalks, foraminifera (Hyperammina, Ammodiscus, Glomospira, Ammobacculites and Spiroplectammina), sponges and sponge spicules, radiolaria, coprolites and permineralised wood.

Zircons of the Ganigobis Shale Member yield SHRIMP-ages of 302-300 Ma. This dates the uppermost part of the second deglaciation sequence in southern Namibia to the Late Carboniferous (Gzelian) and provides a minimum age for the onset of Karoo-equivalent marine deposition. The age of the uppermost argillaceous part of the third deglaciation sequence (297 Ma) was determined from zircons of a tuffaceous bed sampled in a roadcut in the Western Cape Province, South Africa.

Among others, the following fossils are reported from the formation:

Fish

• Acrolepis addamsi
• Namaichthys schroederi
• Watsonichthys lotzi

• List of fossiliferous stratigraphic units in Namibia
• List of fossiliferous stratigraphic units in South Africa
• Geology of Namibia
• Geology of South Africa
• Irati Formation

• Bangert, B.; Stollhofen, H.; Geiger, M.; Lorenz, V. (2000), "Fossil record and high-resolution tephrostratigraphy of Carboniferous glaciomarine mudstones, Dwyka Group, southern Namibia" (PDF), Communications of the Geological Survey of Namibia, 12: 265–276, retrieved 2018-08-26
• Bangert, Berthold (2000), Tephrostratigraphy, petrography, geochemistry, age and fossil record of the Ganigobis Shale Member and associated glaciomarine deposits of the Dwyka Group, Late Carboniferous, southern Africa (PhD thesis) (PDF), Julius-Maximilians-Universität Würzburg, pp. 1–242, retrieved 2018-08-26

• B. G. Gardiner. 1962. Namaichthys schroederi Gürich and other Palaeozoic Fishes from South Africa. Palaeontology 5(1):9-21