Ecca Group
The Ecca Group is the second of the main subdivisions of the Karoo Supergroup of geological strata in southern Africa. It mainly follows conformably after the Dwyka Group in some sections, but in some localities overlying unconformably over much older basement rocks. It underlies the Beaufort Group in all known outcrops and exposures. Based on stratigraphic position, lithostratigraphic correlation, palynological analyses, and other means of geological dating, the Ecca Group ranges between Early to earliest Middle Permian (Asselian - Roadian) in age.
| Ecca Group | |
|---|---|
| Stratigraphic range: Late Late Carboniferous-Early Permian ~ | |
| Type | Geologic group |
| Sub-units | Western/Northwestern facies: Prince Albert Formation, Whitehill Formation, Collingham Formation, Tierberg Formation, Skoorsteenberg Formation, Kookfontein Formation, Waterford Formation.Southern facies: Prince Albert Formation, Whitehill Formation, Collingham Formation, Vischkuil Formation, Laingsburg Formation, Fort Brown Formation, Waterford Formation. Northeastern facies: Pietermaritzburg Formation, Vryheid Formation, Volksrust Formation |
| Underlies | Beaufort Group |
| Overlies | Dwyka Group |
| Lithology | |
| Primary | Shale, mudstone, claystone, siltstone, chert, dolomite, coal |
| Other | Quartzite, pyrite |
| Location | |
| Region | Western & Eastern Cape |
| Country | South Africa Eswatini Namibia Botswana Zimbabwe |
| Type section | |
| Named for | Ecca |
A simplified geological map of the outcrops of Karoo Supergroup rocks in Southern Africa. The Ecca Group is represented by the orange key on the map. | |
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.