| Stormberg Group | |
|---|---|
| Stratigraphic range: Late Triassic-Early Jurassic ~ | |
| Type | Geologic group |
| Unit of | Karoo Supergroup |
| Sub-units | Molteno, Elliot & Clarens Formations |
| Underlies | Drakensberg Group |
| Overlies | Beaufort Group |
| Thickness | up to 4,593.176 feet (1,400 m) |
| Lithology | |
| Primary | Mudstone, claystone, siltstone |
| Other | Sandstone, shale, tuff |
| Location | |
| Region | Eastern Cape, KwaZulu-Natal, Free State, Lesotho, Matabeleland, Central District, Karas, and Hardap |
| Country |  South Africa Lesotho Zimbabwe Botswana |
| Extent | Karoo Basin |
| Type section | |
| Named for | Stormberg Mountains |
 Simplified geological map of the outcrops of Karoo Supergroup rocks in Southern Africa. The Stormberg Group is represented by the green key on the map. | |
The Stormberg Group is one of the four geological groups that comprises the Karoo Supergroup in South Africa. It is the uppermost geological group representing the final phase of preserved sedimentation of the Karoo Basin. The Stormberg Group rocks are considered to range between Lower Triassic (Olenekian) to Lower Jurassic (Pliensbachian) in age. These estimates are based on means of geological dating including stratigraphic position, lithostratigraphic and biostratigraphic correlations, and palynological analyses.[1][2][3]
- ^ Cairncross, B (22 September 2016). Depositional framework and control of coal distribution and quality, Van Dyks Drift area Northern Karoo basin (Masters Thesis). hdl:20.500.11892/83920.
- ^ Christie, ADM (22 September 2016). Stratigraphy and sedimentology of the Molteno formation in the Elliot-Indwe area, Cape Province (Masters Thesis). hdl:20.500.11892/83933.
- ^ Johnson, M.R. (1991). "Sandstone petrography, provenance and plate tectonic setting in Gondwana context of the southeastern Cape-Karoo Basin". South African Journal of Geology. 94 (2–3): 137–54. hdl:10520/AJA10120750_463.