The Upper Karoo Group is a sequence of Triassic to Early Jurassic sedimentary and volcanic rocks found in Botswana, Zambia, and Zimbabwe.[1]
| Upper Karoo Group | |
|---|---|
| Stratigraphic range: Early Triassic-Early Jurassic | |
 Upper Karoo sequence at Siyakobvu, Kariba District, Zimbabwe (left to right: Batoka Formation, Forest Sandstone Formation, Pebbly Arkose Formation) | |
| Type | Geological group |
| Unit of | Karoo Supergroup |
| Sub-units | Escarpment Grit, Angwa Sandstone, Pebbly Arkose Formation, Forest Sandstone, Batoka Formation |
| Overlies | Lower Karoo Group |
| Lithology | |
| Primary | Sandstone |
| Other | Basalt, siltstone, mudstone |
| Location | |
| Country |  Botswana Zambia Zimbabwe |
It comprises the Escarpment Grit (in the Mid-Zambezi and Limpopo basins)[2] and the Angwa Sandstone (in the Mana Pools and Cabora Bassa Basins),[3] overlain by the Pebbly Arkose Formation and the Forest Sandstone, capped by Batoka Formation basalts.[4][5][6][7]
See also edit
References edit
- ^ Catuneanu, O.; Wopfner, H.; Eriksson, P.G.; Cairncross, B.; Rubidge, B.S.; Smith, R.M.H.; Hancox, P.J. (2005). "The Karoo basins of south-central Africa". Journal of African Earth Sciences. 43: 211. Bibcode:2005JAfES..43..211C. doi:10.1016/j.jafrearsci.2005.07.007.
- ^ Bordy, Emese M.; Catuneanu, Octavian (2001). "Sedimentology of the upper Karoo fluvial strata in the Tuli Basin, South Africa". Journal of African Earth Sciences. 33 (3–4): 605. Bibcode:2001JAfES..33..605B. doi:10.1016/S0899-5362(01)00090-2.
- ^ d'Engelbronner, E.R. (1996). "New palynological data from Karoo sediments, Mana Pools basin, northern Zimbabwe". Journal of African Earth Sciences. 23: 17. Bibcode:1996JAfES..23...17D. doi:10.1016/S0899-5362(96)00049-8.
- ^ Jones, D. L.; Duncan, R. A.; Briden, J. C.; Randall, D. E.; MacNiocaill, C. (2001). "Age of the Batoka basalts, northern Zimbabwe, and the duration of Karoo Large Igneous Province magmatism". Geochemistry, Geophysics, Geosystems. 2 (2). Bibcode:2001GGG.....2.1022J. doi:10.1029/2000GC000110.
- ^ Oesterlen, P.M.; Blenkinsop, T.G. (1994). "Extension directions and strain near the failed triple junction of the Zambezi and Luangwa Rift zones, southern Africa". Journal of African Earth Sciences. 18 (2): 175. Bibcode:1994JAfES..18..175O. doi:10.1016/0899-5362(94)90029-9.
- ^ Johnson, M.R; Van Vuuren, C.J; Hegenberger, W.F; Key, R; Show, U (1996). "Stratigraphy of the Karoo Supergroup in southern Africa: An overview". Journal of African Earth Sciences. 23: 3. Bibcode:1996JAfES..23....3J. doi:10.1016/S0899-5362(96)00048-6.
- ^ Shoko, D.S.M.; Gwavava, O. (1999). "Is magmatic underplating the cause of post-rift uplift and erosion within the Cabora Bassa Basin, Zambezi Rift, Zimbabwe?". Journal of African Earth Sciences. 28 (2): 465. Bibcode:1999JAfES..28..465S. doi:10.1016/S0899-5362(99)00015-9.