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Abrahamskraal Formation

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Journal Article
Published: 01 June 2016
South African Journal of Geology (2016) 119 (2): 415–424.
...D.I. Cole; M.R. Johnson; M.O. Day Abstract The Middle Permian Abrahamskraal Formation is the lowermost formation of the lower Beaufort Group (Adelaide Subgroup, Karoo Supergroup) in the main Karoo Basin. It has been amalgamated with the lithologically similar and age-equivalent Koonap Formation...
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Location of holostratotype, <span class="search-highlight">Abrahamskraal</span> <span class="search-highlight">Formation</span>.
Published: 01 June 2016
Figure 2. Location of holostratotype, Abrahamskraal Formation.
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Location of reference stratotype, <span class="search-highlight">Abrahamskraal</span> <span class="search-highlight">Formation</span>.
Published: 01 June 2016
Figure 3. Location of reference stratotype, Abrahamskraal Formation.
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Holostratotype of the <span class="search-highlight">Abrahamskraal</span> <span class="search-highlight">Formation</span> (measured by M.J. Jordaan – s...
Published: 01 June 2016
Figure 4. Holostratotype of the Abrahamskraal Formation (measured by M.J. Jordaan – see APP. 1.2 of Jordaan (1990) –and used by permission).
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Reference stratotype of the <span class="search-highlight">Abrahamskraal</span> <span class="search-highlight">Formation</span> (former holostratotype ...
Published: 01 June 2016
Figure 5. Reference stratotype of the Abrahamskraal Formation (former holostratotype of the Koonap Formation and measured by M. Day, B. Rubidge and R. Mason, School of Geosciences, University of the Witwatersrand – and used by permission).
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Representative photographs of lithofacies from the <span class="search-highlight">Abrahamskraal</span> <span class="search-highlight">Formation</span>....
Published: 01 December 2014
Fig. 6.— Representative photographs of lithofacies from the Abrahamskraal Formation. Tables 1 and 2 outline the lithofacies codes and interpretation of depositional environment. A) Massive fine-grained sandstone (Sm). B) Planar-laminated sandstone (Sh), with primary current lineations
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Conceptual image depicting the evolution of the <span class="search-highlight">Abrahamskraal</span> <span class="search-highlight">Formation</span> bas...
Published: 01 December 2014
Fig. 17.— Conceptual image depicting the evolution of the Abrahamskraal Formation based on the model of progradational distributive fluvial systems (DFSs). The schematic diagrams are based on observations made in this study, and are modified after Nichols and Fisher (2007) , Trendell et al
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A)  Lithostratigraphy, redrawn after  Wickens (1994) , showing the stratigr...
Published: 01 December 2014
Fig. 2.— A) Lithostratigraphy, redrawn after Wickens (1994) , showing the stratigraphic position of the fluvial Abrahamskraal Formation, lower Beaufort Group in the Karoo Supergroup. The Beaufort Group conformably overlies deltaic strata of the Waterford Formation. B) Schematic
Journal Article
Journal: Paleobiology
Published: 08 August 2018
Paleobiology (2018) 44 (3): 347–367.
... stratigraphic intervals. This data set provides an approximate time resolution of 0.3–0.6 Myr and shows that extinction rates increased considerably in the upper 100 m of the mid-Permian Abrahamskraal Formation, corresponding to the latest part of the Tapinocephalus Assemblage Zone (AZ). Origination rates were...
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Journal Article
Published: 01 June 2020
South African Journal of Geology (2020) 123 (2): 141–148.
... Eodicynodon is the most abundant. The biozone reaches a maximum thickness of 1 100 m in the Prince Albert Road area and thins to the east and west. The biozone corresponds to the Combrinkskraal and Grootfontein members of the Abrahamskraal Formation, directly overlies the Waterford Formation of the Ecca Group...
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Journal Article
Published: 01 December 2014
Journal of Sedimentary Research (2014) 84 (12): 1147–1169.
...Fig. 6.— Representative photographs of lithofacies from the Abrahamskraal Formation. Tables 1 and 2 outline the lithofacies codes and interpretation of depositional environment. A) Massive fine-grained sandstone (Sm). B) Planar-laminated sandstone (Sh), with primary current lineations...
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Journal Article
Published: 01 June 2020
South African Journal of Geology (2020) 123 (2): 149–164.
... of the Abrahamskraal Formation, is Capitanian (Guadalupian) in age, and reaches a maximum thickness of around 1500 m. The biozone is here separated into two subzones: a lower Eosimops – Glanosuchus Subzone and an upper Diictodon – Styracocephalus Subzone. The contact between the two subzones is defined by the first...
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Raw specimen (A, C, E) and species (B, D, F) counts for each 50 m stratigra...
Published: 08 August 2018
Figure 3 Raw specimen (A, C, E) and species (B, D, F) counts for each 50 m stratigraphic bin in the Abrahamskraal Formation and lower Teekloof Formation at three levels of stratigraphic precision: using only specimens constrained to occur in a single bin (A, B), one of two bins (C, D), and one
Journal Article
Published: 01 September 2007
South African Journal of Geology (2007) 110 (2-3): 439–448.
... of the Ecca Group (Abrahamskraal Formation). In the northern part of the model, from 50 to 100 km, minimal change in the velocity models indicate more uniform and undisturbed lithologies. © 2007 Geological Society of South Africa 2007 The NVR seismic profile crosses the ~4 km thick siliciclastic...
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Journal Article
Published: 06 December 2002
Canadian Journal of Earth Sciences (2002) 39 (12): 1755–1765.
...Sean P. Modesto; Bruce S. Rubidge; Johann Welman Abstract Two fragmentary skulls from the Upper Permian Tapinocephalus Assemblage Zone (Abrahamskraal Formation, Beaufort Group) in Eastern Cape Province, South Africa, represent a new dicynodont taxon. Lanthanocephalus mohoii gen. et sp. nov...
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Stratigraphy of study area. The study interval, highlighted by a box, is lo...
Published: 01 January 2015
Figure 2 Stratigraphy of study area. The study interval, highlighted by a box, is located in the mid-Permian Abrahamskraal Formation and the underlying Waterford Formation. Based on Flint et al. ( 2011 ) and Wickens ( 1994 ).
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Mudstone (F) lithofacies classification scheme adopted in the <span class="search-highlight">Abrahamskraal</span>...
Published: 01 December 2014
Table 2.— Mudstone (F) lithofacies classification scheme adopted in the Abrahamskraal Formation, lower Beaufort Group, SW Karoo Basin. Modified after Miall (1996) .
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Sandstone (S) and intraformational conglomerate (G) lithofacies classificat...
Published: 01 December 2014
Table 1.— Sandstone (S) and intraformational conglomerate (G) lithofacies classification scheme adopted in the Abrahamskraal Formation, lower Beaufort Group, SW Karoo Basin. Modified after Miall (1996) .
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Dominance in the taxon abundance–frequency distribution in the Karoo Basin....
Published: 08 August 2018
Figure 4 Dominance in the taxon abundance–frequency distribution in the Karoo Basin. A, Relative abundance of Diictodon from its first appearance datum (FAD) between 550 and 500 m below the top of the Abrahamskraal Formation in the northwest quadrant of the basin (the second appearance being
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Figure 9. Middle-Late Permian paleosols of the Karoo Basin, showing measure...
Published: 01 November 2006
Figure 9. Middle-Late Permian paleosols of the Karoo Basin, showing measured distance between top (below bedded overburden) and Bk horizon (white calcareous nodules). (A) Type Tamka pedotype, Eodicynodon zone, north-dipping Abrahamskraal Formation (980 m above base), 2 km north of Modderdrift