Upper Karoo Group

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Upper Karoo Group
Stratigraphic range: Early Triassic-Early Jurassic
Upper-karoo-siyakobvu.png
Upper Karoo sequence at Siyakobvu, Kariba District, Zimbabwe (left to right: Batoka Formation, Forest Sandstone Formation, Pebbly Arkose Formation)
TypeGeological 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

The Upper Karoo Group is a sequence of Triassic to Early Jurassic sedimentary and volcanic rocks found in Botswana, Zambia, and Zimbabwe. [1]

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

References

  1. ↑ 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 (1–3): 211–253. Bibcode:2005JAfES..43..211C. doi:10.1016/j.jafrearsci.2005.07.007.
  2. ↑ 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.
  3. ↑ d'Engelbronner, E.R. (1996). "New palynological data from Karoo sediments, Mana Pools basin, northern Zimbabwe". Journal of African Earth Sciences. 23 (1): 17–30. Bibcode:1996JAfES..23...17D. doi:10.1016/S0899-5362(96)00049-8.
  4. ↑ 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): 1022. Bibcode:2001GGG.....2.1022J. doi:10.1029/2000GC000110.
  5. ↑ 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.
  6. ↑ 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 (1): 3–15. Bibcode:1996JAfES..23....3J. doi:10.1016/S0899-5362(96)00048-6.
  7. ↑ 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.
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