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![First thumbnail for: NEW DEPTH MAPS OF THE MAIN KAROO BASIN, USED TO EX...]()
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![(A)Stratigraphic sections at the type localities of the Floriskraal Formation at Hartnekskloof – Cedarberg.]()
![(A)Stratigraphic sections at the type localities of the Floriskraal Formation at Hartnekskloof – Cedarberg.]()
![(A)Stratigraphic sections at the type localities of the Floriskraal Formation at Hartnekskloof – Cedarberg.]()
![Thickness maps for (a) the main Karoo Basin and (b) Cape Supergroup (1000 metre contour intervals shown). Outcropping Dwyka and Witteberg Group rocks are shown in (a) and (b) respectively (purple). Several towns are indicated (white circles, see Figure 5 for details). The towns of Willowmore (WM) and Steytlerville (SV) are marked (white circles).]()
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![(a) Free-air, (b) Bouguer, (c) isostatic gravity anomaly and (d) total magnetic intensity maps for South Africa. Major tectonic provinces are outlined (see Figure 1 for details). The Cape Isostatic Anomaly extends from Willowmore (WM) through to Steytlerville (ST) and Port Elizabeth (PE) on the east coast (white circles). The Williston (WS), Beattie (BMA) and Mbashe (MB) anomalies are indicated in (d) (Thomas et al., 1992).]()
![(1) A vertical clastic dike, filled with homogenous fine to medium grained, yellow-orange coloured sandstone (A), cuts brown coloured, plane-laminated muddy siltstone (B) at Skitterykloof Pass. (2) Heterolithic unit composed of laminated fine-grained lenticular mudstone, siltstone and fine sandstone (A) with coarser-grained thicker beds of wavy to lenticular fine-grained sandstones (B). Trace fossils, such as Teichichnus sp. (C) occur within sandier units in the heterolithic lithofacies as illustrated here at the Waaipoort road-cutting near Steytlerville.]()
![First thumbnail for: MINERALOGICAL, GEOCHEMICAL AND STRUCTURAL CHARACTE...]()
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![(a) Bouguer gravity and (b) isostatic gravity anomaly map of the region surrounding Willowmore (WM) and Steytlerville (SV), showing the low of the Cape Isostatic Anomaly. Faults in the Cape Fold Belt are indicated (normal – black line, thrust – black line with triangles, see Figure 3 for more details) (Toerien and Roby, 1979; Toerien, 1991; Roby et al., 1995; Booth and Shone, 1999; Booth et al., 2004). Jurassic sediments of the Uitenhage Group are outlined in red. Two refraction seismic profiles are indicated (solid black line) (Stankiewicz et al., 2007). The approximate northern limit of the Cape Fold Belt is shown (dashed black line), as well as the towns of Mossel Bay (MB), Port Elizabeth and Cape St. Francis (StF) (white circles).]()
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![Topographic map of the central portion of the eastern arm of the Cape Fold Belt (Amante and Eakins, 2009). Willowmore (WM), Steytlerville (SV), Mossel Bay (MB) and Cape St Francis (StF) are shown as white circles. The dashed line marks the approximately northern extent of the fold belt. Mapped and inferred faults in the region are indicated (normal – black lines; thrust – black line with black triangles), and labelled (normal faults: CF – Coega, GF – Gamtoos, GRF – Grootrivier, KNF – Kango, KF – Kouga, OQM – Outenique Mountains; thrust faults: BK – Bavianskloof, JF – Jackalsbos, KWF – Klein Winterhoek, SF- Soutkloof, ZF – Zuurberg) (Toerien and Roby, 1979; Toerien, 1991; Roby et al., 1995; Booth and Shone, 1999; Booth et al., 2004). The area outlined (red box) is shown on the zoomed in inset map.]()
![(a) Simplified geological map showing the regional setting and main lithological units of the Cape Fold Belt. Note: Recent sediments have been omitted; location of dotted line represents northernmost limit of deformation; dashed lines represent structural trends; AFFZ = Agulhas Falklands Fracture Zone; S = Steytlerville; U = Uniondale; O = Oudtshoorn and L = Ladismith. ( b) Section A – A′ through the central part of the CFB showing main structural characteristics. Note that thrusting is most pronounced near southern (Ysternek) and central areas (Uniondale) of the section. (c) Seismic section B – B′ through the southern Karoo (simplified after Lindeque et al. 2011, this volume, Figure 8). Note structural grain in basement rocks (Namaqua Metamorphic Complex) dip north, whereas inferred faults in cover rocks (Cape and Karoo Supergroups) dip south.]()
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![(a) Depth map of the Whitehill Formation (from Figure 6b) and (b) corresponding geological map of the region surrounding the town of Willowmore (WM) and Steytlerville (SV) (SACS, 1980). Faults in the Cape Fold Belt are indicated (normal – black line, thrust – black line with triangles; KWF – Klein Winterhoek Thrust Fault, see Figure 3 for more details) (Toerien and Roby, 1979; Toerien, 1991; Roby et al., 1995; Booth and Shone, 1999; Booth et al., 2004). Soekor seismic profiles (black lines) and boreholes (black triangles) are indicated. The coastal towns of Mossel Bay (MB), Port Elizabeth (PE) and Cape St Francis (StF) are marked (white circles). The location of east-west seismic profile KL04C is indicated in (a) (red line), as well as the north-south profiles BV01 (green line), BV03 (yellow line) and P01 (orange line). Deformation of Karoo and Cape sediments is recorded further north on these sections compared to other sections in the surrounding southern Karoo.]()
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1-20 OF 25 RESULTS FOR
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Journal Article
Thrust faults and fold vergence in the Palaeozoic middle and upper Witteberg Group, Cape Supergroup (Cape Fold Belt), Steytlerville: an interpretation of their relationship Available to Purchase
Journal: South African Journal of Geology
Publisher: Geological Society of South Africa
Published: 01 March 2002
South African Journal of Geology (2002) 105 (1): 25–38.
...P.W.K. Booth Abstract Four sections through middle and upper Witteberg Group strata north of Steytlerville were investigated in detail to ascertain the phenomenon of opposite vergence of folds, as well as the relationship between folding and thrusting. Strata of the middle Witteberg Group...
FIGURES
Journal Article
The effect of thrusting on fold style and orientation, Weltevrede Formation (Cape Supergroup), Steytlerville, Eastern Cape Free
Journal: South African Journal of Geology
Publisher: Geological Society of South Africa
Published: 01 March 1998
South African Journal of Geology (1998) 101 (1): 27–37.
Journal Article
NEW DEPTH MAPS OF THE MAIN KAROO BASIN, USED TO EXPLORE THE CAPE ISOSTATIC ANOMALY, SOUTH AFRICA Available to Purchase
Journal: South African Journal of Geology
Publisher: Geological Society of South Africa
Published: 01 September 2015
South African Journal of Geology (2015) 118 (3): 225–248.
.... The gravity effect of these sediments does not account for the Cape Isostatic Anomaly (CIA) in the southern part of the Karoo Basin near Willowmore and Steytlerville, i.e., an ~45 mGal Bouguer gravity low. A refraction seismic profile over the anomaly shows this region is associated with a large volume of low...
FIGURES
Image
(A)Stratigraphic sections at the type localities of the Floriskraal Formati... Available to Purchase
in Lithostratigraphy of the Floriskraal Formation (Witteberg Group), South Africa
> South African Journal of Geology
Published: 01 June 2016
Formation at Draaikrans – Steytlerville.
Image
(A)Stratigraphic sections at the type localities of the Floriskraal Formati... Available to Purchase
in Lithostratigraphy of the Floriskraal Formation (Witteberg Group), South Africa
> South African Journal of Geology
Published: 01 June 2016
Formation at Draaikrans – Steytlerville.
Image
(A)Stratigraphic sections at the type localities of the Floriskraal Formati... Available to Purchase
in Lithostratigraphy of the Floriskraal Formation (Witteberg Group), South Africa
> South African Journal of Geology
Published: 01 June 2016
Formation at Draaikrans – Steytlerville.
Image
Thickness maps for ( a ) the main Karoo Basin and ( b ) Cape Supergroup (10... Available to Purchase
in NEW DEPTH MAPS OF THE MAIN KAROO BASIN, USED TO EXPLORE THE CAPE ISOSTATIC ANOMALY, SOUTH AFRICA
> South African Journal of Geology
Published: 01 September 2015
of Willowmore (WM) and Steytlerville (SV) are marked (white circles).
Journal Article
STRATIGRAPHIC, STRUCTURAL AND TECTONIC ENIGMAS ASSOCIATED WITH THE CAPE FOLD BELT: CHALLENGES FOR FUTURE RESEARCH Available to Purchase
Journal: South African Journal of Geology
Publisher: Geological Society of South Africa
Published: 01 December 2011
South African Journal of Geology (2011) 114 (3-4): 235–248.
... the regional setting and main lithological units of the Cape Fold Belt. Note: Recent sediments have been omitted; location of dotted line represents northernmost limit of deformation; dashed lines represent structural trends; AFFZ = Agulhas Falklands Fracture Zone; S = Steytlerville; U = Uniondale; O...
FIGURES
Image
( a ) Free-air, ( b ) Bouguer, ( c ) isostatic gravity anomaly and ( d ) to... Available to Purchase
in NEW DEPTH MAPS OF THE MAIN KAROO BASIN, USED TO EXPLORE THE CAPE ISOSTATIC ANOMALY, SOUTH AFRICA
> South African Journal of Geology
Published: 01 September 2015
Figure 4 ( a ) Free-air, ( b ) Bouguer, ( c ) isostatic gravity anomaly and ( d ) total magnetic intensity maps for South Africa. Major tectonic provinces are outlined (see Figure 1 for details). The Cape Isostatic Anomaly extends from Willowmore (WM) through to Steytlerville (ST) and Port
Image
( 1 ) A vertical clastic dike, filled with homogenous fine to medium graine... Available to Purchase
in Lithostratigraphy of the Kweekvlei Formation (Witteberg Group), Cape Supergroup
> South African Journal of Geology
Published: 01 September 2017
and fine sandstone (A) with coarser-grained thicker beds of wavy to lenticular fine-grained sandstones (B). Trace fossils, such as Teichichnus sp. (C) occur within sandier units in the heterolithic lithofacies as illustrated here at the Waaipoort road-cutting near Steytlerville.
Journal Article
MINERALOGICAL, GEOCHEMICAL AND STRUCTURAL CHARACTERISTICS OF QUARTZ-ARENITES OF THE WITPOORT FORMATION (CAPE SUPERGROUP) NEAR KIRKWOOD, EASTERN CAPE, SOUTH AFRICA Available to Purchase
Journal: South African Journal of Geology
Publisher: Geological Society of South Africa
Published: 01 December 2011
South African Journal of Geology (2011) 114 (3-4): 249–264.
... . The relationship between folding and thrusting in the Floriskraal Formation (upper Witteberg Group), Steytlerville, Eastern Cape . South African Journal of Geology , 99 , 235 – 248 . 10.2113/gssajg.114.3-4.235 Booth P.W.K. , 2002 . Thrust faults and fold vergence in the Palaeozoic middle and upper...
FIGURES
Image
( a ) Bouguer gravity and ( b ) isostatic gravity anomaly map of the region... Available to Purchase
in NEW DEPTH MAPS OF THE MAIN KAROO BASIN, USED TO EXPLORE THE CAPE ISOSTATIC ANOMALY, SOUTH AFRICA
> South African Journal of Geology
Published: 01 September 2015
Figure 11 ( a ) Bouguer gravity and ( b ) isostatic gravity anomaly map of the region surrounding Willowmore (WM) and Steytlerville (SV), showing the low of the Cape Isostatic Anomaly. Faults in the Cape Fold Belt are indicated (normal – black line, thrust – black line with triangles, see Figure
Journal Article
Lithostratigraphy of the Kweekvlei Formation (Witteberg Group), Cape Supergroup Available to Purchase
Journal: South African Journal of Geology
Publisher: Geological Society of South Africa
Published: 01 September 2017
South African Journal of Geology (2017) 120 (3): 421–432.
... and fine sandstone (A) with coarser-grained thicker beds of wavy to lenticular fine-grained sandstones (B). Trace fossils, such as Teichichnus sp. (C) occur within sandier units in the heterolithic lithofacies as illustrated here at the Waaipoort road-cutting near Steytlerville. ...
FIGURES
Image
Topographic map of the central portion of the eastern arm of the Cape Fold ... Available to Purchase
in NEW DEPTH MAPS OF THE MAIN KAROO BASIN, USED TO EXPLORE THE CAPE ISOSTATIC ANOMALY, SOUTH AFRICA
> South African Journal of Geology
Published: 01 September 2015
Figure 3 Topographic map of the central portion of the eastern arm of the Cape Fold Belt ( Amante and Eakins, 2009 ). Willowmore (WM), Steytlerville (SV), Mossel Bay (MB) and Cape St Francis (StF) are shown as white circles. The dashed line marks the approximately northern extent of the fold belt
Image
( a ) Simplified geological map showing the regional setting and main litho... Available to Purchase
in STRATIGRAPHIC, STRUCTURAL AND TECTONIC ENIGMAS ASSOCIATED WITH THE CAPE FOLD BELT: CHALLENGES FOR FUTURE RESEARCH
> South African Journal of Geology
Published: 01 December 2011
Falklands Fracture Zone; S = Steytlerville; U = Uniondale; O = Oudtshoorn and L = Ladismith. ( b ) Section A – A′ through the central part of the CFB showing main structural characteristics. Note that thrusting is most pronounced near southern (Ysternek) and central areas (Uniondale) of the section. ( c
Journal Article
Lithostratigraphy of the Floriskraal Formation (Witteberg Group), South Africa Available to Purchase
Journal: South African Journal of Geology
Publisher: Geological Society of South Africa
Published: 01 June 2016
South African Journal of Geology (2016) 119 (2): 425–434.
... Formation at Draaikrans – Steytlerville. ...
FIGURES
Image
( a ) Depth map of the Whitehill Formation (from Figure 6b ) and ( b ) cor... Available to Purchase
in NEW DEPTH MAPS OF THE MAIN KAROO BASIN, USED TO EXPLORE THE CAPE ISOSTATIC ANOMALY, SOUTH AFRICA
> South African Journal of Geology
Published: 01 September 2015
Figure 9 ( a ) Depth map of the Whitehill Formation (from Figure 6b ) and ( b ) corresponding geological map of the region surrounding the town of Willowmore (WM) and Steytlerville (SV) ( SACS, 1980 ). Faults in the Cape Fold Belt are indicated (normal – black line, thrust – black line
Journal Article
THRUST FAULTING IN THE NORTHERNMOST FORELAND ZONE OF THE CAPE FOLD BELT, FORT BEAUFORT, EASTERN CAPE, SOUTH AFRICA Available to Purchase
Journal: South African Journal of Geology
Publisher: Geological Society of South Africa
Published: 01 December 2014
South African Journal of Geology (2014) 117 (2): 301–315.
... and lower Palaeozoic Table Mountain Groups of the Cape Fold Belt, revisited . South African Journal of Geology , 100 , 237 – 250 . Booth P.W.K. , 1996 . The relationship between folding and thrusting in the Floriskraal Formation (upper Witteberg Group), Steytlerville, Eastern Cape . South...
FIGURES
Journal Article
Late Palaeozoic to Mesozoic structural evolution of the Falkland Islands: a displaced segment of the Cape Fold Belt Available to Purchase
Journal: Journal of the Geological Society
Publisher: Geological Society of London
Published: 01 February 1998
Journal of the Geological Society (1998) 155 (1): 115–129.
... Booth P.W.K. The relationship between folding and thrusting in the Floriskraal Formation (upper Witteberg Group), Steytlerville, Eastern Cape South African Journal of Geology 1996 99 235 243 Borello, A.V. 1963. Sobre la geolgía de las Islas Malvinas Ediciones Cultura Argentina, Ministerio...
Journal Article
Late Permian tectonics and associated fluid influx during the Cape Orogeny: evidence from fault-bound quartz veins in the Witteberg Group (Cape Supergroup, South Africa) Available to Purchase
Journal: South African Journal of Geology
Publisher: Geological Society of South Africa
Published: 01 June 2016
South African Journal of Geology (2016) 119 (2): 379–398.
... Formation (upper Witteberg Group), Steytlerville, Eastern Cape . South African Journal of Geology , 99, 235 – 243 . Booth , P.W.K. , 1998 . The effect of thrusting on fold style and orientation, Weltevrede Formation (Cape Supergroup), Steytlerville, Eastern Cape . South African Journal...
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