Dwyka Group
The Dwyka Group is one of four geological groups that compose the Karoo Supergroup. It is the lowermost geological group and heralds the commencement of sedimentation of the Karoo Supergroup. Based on stratigraphic position, lithostratigraphic correlation and palynological analyses, these lowermost Karoo strata range between the Late Carboniferous (Pennsylvanian) to Early Permian in age.
| Dwyka Group | |
|---|---|
| Stratigraphic range: Late Carboniferous-Early Permian ~ | |
| Type | Geologic group |
| Sub-units | Mbizane, Elandsvlei & Tshidzi Formations |
| Underlies | Ecca Group |
| Overlies | Cape Supergroup, Natal Supergroup, Namaqua-Natal Province, Archean basement rocks |
| Lithology | |
| Primary | Diamictite, tillite, claystone, mudstone |
| Other | Quartzite, sandstone shale |
| Location | |
| Coordinates | 26.0°S 29.5°E |
| Approximate paleocoordinates | 76.2°S 52.2°W |
| Region | Western, Northern Cape, Free State, North-West, Limpopo, Eastern Cape, and KwaZulu-Natal |
| Country | South Africa Namibia Botswana Zimbabwe |
| Type section | |
| Named for | Dwyka |
A simplified geological map of the outcrops of Karoo Supergroup rocks in Southern Africa. The Dwyka Group deposits are represented by the red key on the map | |
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