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The third of the main subdivisions of the Karoo Supergroup in South Africa.
The Beaufort Group rocks are predominantly mudstone-dominated up until the upper sections in the lower Tarkastad Subgroup. Tuffs are also found due to concurrent volcanic activity that took place with the foreland tectonics.
Hill in siliciclastic strata (mud or siltstones capped by solid sandstone) of Teekloof or Abrahamskraal formation (Beaufort Group) of the Main Karoo Basin. Karoo National Park near Beaufort West, Western Cape Province, South Africa.
The geological formations of the Beaufort Group are outcrop over approximately 145 000 km2, attaining a total thickness of around 6000 m thick at its thickest outcrops. In the west, the lowermost Beaufort Group rocks are found east of Laingsburg and remain continuous eastward to East London. Deposits are also found in the central Karoo and continue north-north-eastwards to Gariep Dam, Colesburg, and up to Bloemfontein. In the extreme north and north-east, the Beaufort Group outcrops in Harrismith and northeastern KwaZulu-Natal.
The Adelaide Subgroup is the lower subgroup of the Beaufort Group and contains all Middle to Late Permian-aged rocks. This subgroup contains six geological formations in total, however, these formations are latitude specific. These formations are the Abrahaamskraal and Teekloof Formations, west of 24°E, Middleton and Balfour Formations east of 24°E, and the Normandien and Emakwezini Formations in the northern Free-State and Kwa-Zulu Natal provinces. Composing the lower Beaufort succession, the rocks are mudstone-dominated. The mudstones in the lower Beaufort Group are mainly greenish-grey to blueish-grey and gradually change to greyish-red, reddish-brown or purple in color. The dominant presence of mudstones in the lower Beaufort Group represent tranquil depositional settings such as overbank or floodplainfacies associations. The formations here are listed below (from oldest to youngest):
Upper-side 3D rendering of the content inside the burrow cast BP/1/5558 in semi-transparency. Thrinaxodon liorhinus (in brown; BP/1/7199) is lying on its ventral side; Broomistega putterilli (in grey; BP/1/7200) deposited upside down on the right side of the Thrinaxodon. Source: Abdala et al. 2013)
Biostratigraphic correlation of fossils in the greater Gondwana across present-day South America, southern Africa, Antarctica and Australia.
^Keyser, A. W., & Smith, R. M. H. (1978). Vertebrate biozonation of the Beaufort Group with special reference to the western Karoo Basin. Geological Survey, Department of Mineral And Energy Affairs, Republic of South Africa.
^Rubidge, B. S. (ed.) 1995b. Biostratigraphy of the Beaufort Group (Karoo Supergroup). South African Committee of Stratigraphy. Biostratigraphic Series 1. Pretoria, Council for Geoscience.
^Jirah, Sifelani; McPhee, Blair W.; Viglietti, Pia A.; Bamford, Marion K.; Choiniere, Jonah N.; Hancox, P. John; Barbolini, Natasha; Day, Michael O.; Rubidge, Bruce S. (2016), "Advances in Nonmarine Karoo Biostratigraphy: Significance for Understanding Basin Development", Origin and Evolution of the Cape Mountains and Karoo Basin, Regional Geology Reviews, Springer, Cham, pp. 141-149, doi:10.1007/978-3-319-40859-0_14, ISBN9783319408583
^Clevis, Quintijn; Boer, Poppe L. De; Nijman, Wouter (2004). "Differentiating the effect of episodic tectonism and eustatic sea-level fluctuations in foreland basins filled by alluvial fans and axial deltaic systems: insights from a three-dimensional stratigraphic forward model". Sedimentology. 51 (4): 809-835. Bibcode:2004Sedim..51..809C. doi:10.1111/j.1365-3091.2004.00652.x. ISSN1365-3091.
^Day, M.O. and Rubidge, B.S. (2014-12-01). "A brief lithostratigraphic review of the Abrahamskraal and Koonap formations of the Beaufort Group, South Africa: Towards a basin-wide stratigraphic scheme for the Middle Permian Karoo". Journal of African Earth Sciences. 100: 227-242. Bibcode:2014JAfES.100..227D. doi:10.1016/j.jafrearsci.2014.07.001. ISSN1464-343X.CS1 maint: multiple names: authors list (link)
^Viglietti, P. A., Smith, R. M., Angielczyk, K. D., Kammerer, C. F., Fröbisch, J., & Rubidge, B. S. (2016-01-01). "The Daptocephalus Assemblage Zone (Lopingian), South Africa: A proposed biostratigraphy based on a new compilation of stratigraphic ranges". Journal of African Earth Sciences. 113: 153-164. Bibcode:2016JAfES.113..153V. doi:10.1016/j.jafrearsci.2015.10.011. ISSN1464-343X.CS1 maint: multiple names: authors list (link)
^Katemaunzanga, David; Gunter, Cornelis Janse (2009). "Lithostratigraphy, Sedimentology, and Provenance of the Balfour Formation (Beaufort Group) in the Fort Beaufort-Alice Area, Eastern Cape Province, South Africa". Acta Geologica Sinica - English Edition. 83 (5): 902-916. doi:10.1111/j.1755-6724.2009.00110.x. ISSN1755-6724.
^Jourbert, M.R., 1994. Emakwezini Formation. Lexicon of South African Stratigraphy: Part, 1.
^Aristov, D.S., Prevec, R. and Mostovski, M.B., 2009. (2009). "New and poorly known grylloblattids (Insecta: Grylloblattida) from the Lopingian of the Lebombo Basin, South Africa. African Invertebrates, 50(2), pp.279-286". African Invertebrates. 50 (2): 279-286. doi:10.5733/afin.050.0205.CS1 maint: multiple names: authors list (link)
^Johnson, M.R., Van Vuuren, C.J., Visser, J.N.J., Cole, D.I. and Wickens, H., 2006. H., Christie, ADM, Roberts, DL and Brandl, G., 2006. Sedimentary rocks of the Karoo Supergroup. The Geology of South Africa Geological. Society of South Africa/Council For Geoscience, 461, p. 499.
^Reisz, R. R., Dilkes, D. W. & Berman, D. S. 1998. (1998). "Anatomy and relationships of Elliotsmithia longiceps Broom, a small synapsid (Eupelycosauria: Varanopseidae) from the Late Permian of South Africa. Journal of Vertebrate Paleontology, 18, 602-611". Journal of Vertebrate Paleontology. 18 (3): 602-611. doi:10.1080/02724634.1998.10011087.CS1 maint: multiple names: authors list (link)
^Botha-Brink, J. and Smith, R.M., 2011. (2011). "Osteohistology of the Triassic archosauromorphs Prolacerta, Proterosuchus, Euparkeria, and Erythrosuchus from the Karoo Basin of South Africa. Journal of Vertebrate Paleontology, 31(6), pp.1238-1254". Journal of Vertebrate Paleontology. 31 (6): 1238-1254. doi:10.1080/02724634.2011.621797.CS1 maint: multiple names: authors list (link)
^Broom, R. (1906). V.--On the Permian and Triassic Faunas of South Africa. Geological Magazine, 3(1), 29-30.
^Broom, R. 1935. On some new genera and species of Karroo fossil reptiles. Annals of the Transvaal Museum, 18, 55-72.
^Broom, R. 1948. A contribution to our knowledge of the vertebrates of the Karroo Beds of South Africa. Transactions of the Royal Society of Edinburgh, 61, 577-629.
^Cluver, M. A. 1975. A new dicynodont reptile from the Tapinocephalus Zone (Karoo System, Beaufort series) of South Africa, with evidence of the jaw adductor musculature. Annals of the South Africa Museum, 67, 7-23.
^Cluver, M. A. & King, G. M. 1983. A reassessment of the relationships of Permian Dicynodontia (Reptilia, Therapsida) and a new classification of dicynodonts. Annals of the South African Museum, 91, 195-273
^Boonstra, L.D., 1969. The fauna of the Tapinocephalus Zone (Beaufort beds of the Karoo).
^Modesto, Sean; Rubidge, Bruce; Visser, Ian; Welman, Johann (2003-01-01). "A new basal dicynodont from the Upper Permian of South Africa". Palaeontology. 46 (1): 211-223. doi:10.1111/1475-4983.00295. ISSN0031-0239.
^Bain, A.G., 1845. On the discovery of the fossil remains of bidental and other reptiles in South Africa. Quarterly Journal of the Geological Society, 1(1), pp.317-318.
^Seeley, H.G., 1892. Researches on the structure, organization, and classification of the fossil Reptilia. VII. Further observations on Pareiasaurus. Philosophical Transactions of the Royal Society of London. B, 183, pp.311-370.
^Watson, D.M.S., 1914. II.--The Zones of the Beaufort Beds of the Karroo System in South Africa. Geological Magazine, 1(5), pp.203-208.
^Kitching, J. W. (1970). A short review of the Beaufort zoning in South Africa. In Second Gondwana Symposium Proceedings and Papers (Vol. 1, pp. 309-312).
^Bond, D. P. G., Wignall, P. B., Wang, W., Izon, G., Jiang, H. S., Lai, X. L., Sun, Y. D., Newton, R. J., Shao, L. Y., Védrine, S. & Cope, H. (2010-06-01). "The mid-Capitanian (Middle Permian) mass extinction and carbon isotope record of South China". Palaeogeography, Palaeoclimatology, Palaeoecology. 292 (1-2): 282-294. Bibcode:2010PPP...292..282B. doi:10.1016/j.palaeo.2010.03.056. ISSN0031-0182.CS1 maint: multiple names: authors list (link)
^Boos, A.D.S., Kammerer, C.F., Schultz, C.L. and Neto, V.P. (2015-11-01). "A tapinocephalid dinocephalian (Synapsida, Therapsida) from the Rio do Rasto Formation (Paraná Basin, Brazil): Taxonomic, ontogenetic and biostratigraphic considerations". Journal of South American Earth Sciences. 63: 375-384. Bibcode:2015JSAES..63..375B. doi:10.1016/j.jsames.2015.09.003. ISSN0895-9811.CS1 maint: multiple names: authors list (link)