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Witpoort Formation

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Journal Article
Published: 01 December 2011
South African Journal of Geology (2011) 114 (3-4): 249–264.
... regional structural patterns of the Cape Fold Belt in the Eastern Cape. Samples from the Witpoort Formation were analyzed using petrographic light microscopy, scanning electron microscopy and X-ray fluorescent spectroscopy. Analyses indicate that samples are composed almost entirely of quartz...
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First thumbnail for: MINERALOGICAL, GEOCHEMICAL AND STRUCTURAL CHARACTE...
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(1)The uppermost 2 m (A) of the Witpoort Formation at Skitterykloof are characterised by orange-coloured, planar laminated to faintly cross-laminated medium to fine-grained sandstones with occasional rounded orthoquartzite clasts and mud flasers. The road through Skitterykloof Pass and the scree-obscured Witpoort-Kweekvlei Formation contact are visible in this photo. (2) Flat-topped ripples in the Witpoort Formation near the contact with the Kweekvlei (380 mm long geological hammer for scale).
Published: 01 September 2017
Figure 7. ( 1 )The uppermost 2 m (A) of the Witpoort Formation at Skitterykloof are characterised by orange-coloured, planar laminated to faintly cross-laminated medium to fine-grained sandstones with occasional rounded orthoquartzite clasts and mud flasers. The road through Skitterykloof Pass
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The geochemical classification of quartzites of the Witpoort Formation (after Herron, 1988).
Published: 01 December 2011
Figure 5. The geochemical classification of quartzites of the Witpoort Formation (after Herron, 1988 ).
Journal Article
Journal: PALAIOS
Published: 15 September 2022
PALAIOS (2022) 37 (9): 471–485.
...CHRISTOPHER HARRIS; ROBERT W. GESS Abstract A formerly unknown fossil-bearing locality in the lower part of the Witpoort Formation (Witteberg Group, Cape Supergroup) is described from the Eastern Cape (South Africa). Uniquely for these strata, it provides evidence for a back-barrier lagoon hosting...
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First thumbnail for: INSIGHTS FROM A MONOSPECIFIC LINGULID BRACHIOPOD B...
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In the Hartnekskloof valley the prominent cliff is composed of Floriskraal Formation sandstones while the scree covered slope is the Kweekvlei Formation. The typical horizontally laminated mudstone of the lower Kweekvlei Formation, near the contact with the underlying Witpoort Formation, is visible in the foreground.
Published: 01 September 2017
Figure 2. In the Hartnekskloof valley the prominent cliff is composed of Floriskraal Formation sandstones while the scree covered slope is the Kweekvlei Formation. The typical horizontally laminated mudstone of the lower Kweekvlei Formation, near the contact with the underlying Witpoort Formation
Journal Article
Published: 01 September 2017
South African Journal of Geology (2017) 120 (3): 421–432.
...Figure 7. ( 1 )The uppermost 2 m (A) of the Witpoort Formation at Skitterykloof are characterised by orange-coloured, planar laminated to faintly cross-laminated medium to fine-grained sandstones with occasional rounded orthoquartzite clasts and mud flasers. The road through Skitterykloof Pass...
FIGURES
First thumbnail for: Lithostratigraphy of the Kweekvlei <span class="se...
Second thumbnail for: Lithostratigraphy of the Kweekvlei <span class="se...
Third thumbnail for: Lithostratigraphy of the Kweekvlei <span class="se...
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Macrostuctures in the Grey Street exposure. (A) Gentle anticline in the Grey Street exposure. S0 dips shallowly to the northeast on the left (NE) side of the hinge and southwest on the right (SW) side of the hinge. Hydraulic thrusts, indicated by vein quartz (inset), are abundant to the southwest of, and within, the hinge zone (dashed lines), but are absent on the northeast dipping limb. (B) Reverse and thrust faulting in quartzitic sandstones of the Witpoort Formation. Dragging of the sedimentary bedding in the footwall of the reverse fault suggests deformation in the brittle-ductile transition of quartzitic sandstone. Thrust faults along bedding planes in quartzitic sandstone or in shale layers are associated with synkinematic quartz veining (0.5 to 30 mm thick). In the upper part of the exposure, thrusts offset the reverse fault.
Published: 01 June 2016
to the southwest of, and within, the hinge zone (dashed lines), but are absent on the northeast dipping limb. (B) Reverse and thrust faulting in quartzitic sandstones of the Witpoort Formation. Dragging of the sedimentary bedding in the footwall of the reverse fault suggests deformation in the brittle-ductile
Journal Article
Published: 01 June 2016
South African Journal of Geology (2016) 119 (2): 425–434.
... recovered from the Floriskraal Formation, as well as relative biostratigraphic constraints placed on it by palynomorph, fish and plant fossils recovered from the overlying Waaipoort (Early Carboniferous: Tournaisian – Viséan) and underlying Kweekvlei (Tournaisian) and Witpoort Formations (Late Devonian...
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First thumbnail for: Lithostratigraphy of the Floriskraal <span class="...
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Selected borehole collar positions in the Bothaville area (Appendix A), including borehole LLE1 collared in the Makwassie Formation outcrop at Makwassie Hills, near Witpoort.
Published: 01 December 2018
Figure 4. Selected borehole collar positions in the Bothaville area (Appendix A), including borehole LLE1 collared in the Makwassie Formation outcrop at Makwassie Hills, near Witpoort.
Journal Article
Published: 01 September 2007
South African Journal of Geology (2007) 110 (2-3): 225–234.
... and lies on the 3320BC Fisantekraal 1:50 000 sheet (Figure 1 ). The 3320BC Fisantekraal 1:50 000 sheet geology map of the area shows the geology setting of Karoo tillites of the Dwyka Formation (Karoo Supergroup), and massive sandstones (Witpoort Formation) and shales (Kweekvlei Formation) of the Cape...
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First thumbnail for: Report on preliminary geotechnical and tropospheri...
Second thumbnail for: Report on preliminary geotechnical and tropospheri...
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Journal Article
Published: 01 December 2007
South African Journal of Geology (2007) 110 (4): 617–630.
... layers (Houtenbek Formation?) form the floor of the intrusion. Further northwards, the floor consists of Dullstroom volcanics with a thickness of 500 m on Rietvalley. The volcanics ultimately form a series of layers almost 1500 m thick in the Konterdanskloof/ Witpoort area ( Frick, 1972 ) where...
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First thumbnail for: The occurrence of the critical zone along the expo...
Second thumbnail for: The occurrence of the critical zone along the expo...
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Journal Article
Published: 01 June 2016
South African Journal of Geology (2016) 119 (2): 379–398.
... to the southwest of, and within, the hinge zone (dashed lines), but are absent on the northeast dipping limb. (B) Reverse and thrust faulting in quartzitic sandstones of the Witpoort Formation. Dragging of the sedimentary bedding in the footwall of the reverse fault suggests deformation in the brittle-ductile...
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First thumbnail for: Late Permian tectonics and associated fluid influx...
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Journal Article
Published: 01 March 2000
South African Journal of Geology (2000) 103 (1): 1–14.
... Fold Belt: the Wagen Drift; Blinkberg; and Swartruggens Formations (Figures 2 and 3 ). This lower part of the Witteberg Group is underlain by the shaly Karoopoort Formation of the Bokkeveld Group, and overlain by the thick, sandstone-dominated Witpoort Formation ( Theron and Thamm, 1990 ; Broquet...
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First thumbnail for: Depositional setting and cyclic development of the...
Second thumbnail for: Depositional setting and cyclic development of the...
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Journal Article
Published: 01 March 2002
South African Journal of Geology (2002) 105 (1): 25–38.
...) are predominantly argillaceous in the lower part of the formation, whereas in the upper part they are predominantly arenaceous ( Booth, 1998 ). Rock types of Unit 2 (Witpoort Formation) are easily recognised in the field as light grey quartzites and green shales (the former predominating), and alternating brown...
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First thumbnail for: Thrust faults and fold vergence in the Palaeozoic ...
Second thumbnail for: Thrust faults and fold vergence in the Palaeozoic ...
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Journal Article
Published: 01 December 2018
South African Journal of Geology (2018) 121 (4): 363–382.
...Figure 4. Selected borehole collar positions in the Bothaville area (Appendix A), including borehole LLE1 collared in the Makwassie Formation outcrop at Makwassie Hills, near Witpoort. ...
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First thumbnail for: Borehole LLE1 – an intra-caldera succession of the...
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Series: Geological Society, London, Special Publications
Published: 01 January 2016
DOI: 10.1144/SP423.13
EISBN: 9781862399556
..., West Falkland and South Africa. The Bolivian section is based on Campo Redondo and Bermejo in the sub-Andean zone ( Troth et al. 2011 ); the Falkland Islands is based on original data presented here; and South Africa is a compilation of the Eastern (up to the Witpoort Formation) and Western Cape...
Journal Article
Published: 01 December 2017
South African Journal of Geology (2017) 120 (4): 525–540.
..., but the effects of lead mobility and high common lead remain potential pitfalls. The ages of the 'type' formations of the Ventersdorp Supergroup sensu stricto are still not well established and much of the published data is on units only considered to be correlated with the 'type' formations. Quartz porphyry...
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First thumbnail for: Microbeam U-Pb Zircon dating of the Makwassie <spa...
Second thumbnail for: Microbeam U-Pb Zircon dating of the Makwassie <spa...
Third thumbnail for: Microbeam U-Pb Zircon dating of the Makwassie <spa...
Journal Article
Published: 01 November 2004
The Journal of Geology (2004) 112 (6): 655–670.
... Famennian, and the Perry, Maine, flora of Kräusel and Weyland ( 1941 ). Many of these assemblages contain Rhacophyton and Archaeopteris-Svalbardia , which occurred widely during the late Famennian, including the Famennian Witpoort Formation of South Africa (Streel and Theron 1999 ). Figure 4...
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First thumbnail for: Ice and Its Consequences: Glaciation in the Late O...
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Journal Article
Published: 01 December 2016
South African Journal of Geology (2016) 119 (4): 585–606.
... of the Lichtenburg – Ventersdorp area occur mainly as sinuous ridges or ‘runs’ and in isolated sinkholes that occur almost entirely on a flat to very gently southward sloping surface developed on chert-rich and chert-poor formations the Malmani Subgroup dolomites of the Transvaal Supergroup ( Figure 1...
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First thumbnail for: Early Permian diamond-bearing proximal eskers in t...
Second thumbnail for: Early Permian diamond-bearing proximal eskers in t...
Third thumbnail for: Early Permian diamond-bearing proximal eskers in t...
Journal Article
Published: 07 August 2015
Geological Magazine (2016) 153 (3): 460–486.
... and quartz pebble conglomerate support a shallow-marine shelf depositional setting (Visser, 1974 ; Kingsley, 1975 ; Shone & Booth, 2005 ; Thamm & Johnson, 2006 ; Hicks, 2010 ). This depositional setting is very similar to that of the Witpoort Formation...
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First thumbnail for: Detrital zircon U–Pb ages of the Palaeozoic Natal ...
Second thumbnail for: Detrital zircon U–Pb ages of the Palaeozoic Natal ...
Third thumbnail for: Detrital zircon U–Pb ages of the Palaeozoic Natal ...