1-20 OF 41 RESULTS FOR

Tswaing Crater

Results shown limited to content with bounding coordinates.
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Journal Article
Published: 01 September 2007
South African Journal of Geology (2007) 110 (2-3): 311–326.
... (2002) ; O’Connor and Thomas (1999) ; Stokes et al. (1998) ; Stokes et al. (1997) (left frame), and further cave studies in south-eastern Africa from Brook et al. (1997) (right frame); ( b ) Crater lake Tswaing with present day vegetation: Acacia dominating the lower slope, Spirostachys...
FIGURES | View All (10)
Journal Article
Published: 01 March 2016
South African Journal of Geology (2016) 119 (1): 215–230.
... brecciated sandstone and shale of the Beaufort Group. Kalkkop has been previously dated at ~250 Ka using the U-Th method, similar in age to the Tswaing Crater, 40 km northwest of Pretoria. However, the inferred crater rim at Kalkkop has been almost entirely eroded and, given the low regional erosion rates...
FIGURES | View All (13)
Image
Cross section of Kalkkop and <span class="search-highlight">Tswaing</span> <span class="search-highlight">craters</span> showing the highly eroded Kalk...
Published: 01 March 2016
Figure 12. Cross section of Kalkkop and Tswaing craters showing the highly eroded Kalkkop rim (modified from Reimold et al., 1998 ).
Journal Article
Published: 01 December 2021
South African Journal of Geology (2021) 124 (4): 1033–1046.
... and marine environments. Excellent examples come from the Tswaing crater (Kristen et al., 2007) and marine deposits from the southern KwaZulu-Natal coastline ( Simon et al., 2015 ). Table 1. Elemental proxy records of palaeoenvironmental change in southern Africa. Studies selected on the basis...
FIGURES | View All (4)
Image
(A–D) Comparison of Cape Fold Composite calcite δ 13 C record with orbital ...
Published: 23 July 2021
(ssNa+; EPICA—European Project for Ice Coring in Antarctica) record ( Fischer et al., 2007 ) (C), and hydroclimate proxies from Tswaing Crater, South Africa ( Partridge et al., 1997 ) and the Gulf of Aden (δD values multiplied by −1 for comparability with the Tswaing Crater record; Tierney et al., 2017
Image
Projection of the orbits Near-Earth Asteroids known in 2000 superimposed on...
Published: 01 March 2007
on an initial diagram by Chapman and Morrison (1994) . K/P = Cretaceous/Paleogene boundary event (= Chicxulub impact event). Tswaing crater would plot together with Meteor Crater of the same size, and Vredefort would be located in this plot to the southeast of the K/P impact.
Image
Projection of the orbits Near-Earth Asteroids known in 2000 superimposed on...
Published: 01 March 2007
on an initial diagram by Chapman and Morrison (1994) . K/P = Cretaceous/Paleogene boundary event (= Chicxulub impact event). Tswaing crater would plot together with Meteor Crater of the same size, and Vredefort would be located in this plot to the southeast of the K/P impact.
Journal Article
Journal: Geology
Published: 23 July 2021
Geology (2021) 49 (11): 1353–1357.
... (ssNa+; EPICA—European Project for Ice Coring in Antarctica) record ( Fischer et al., 2007 ) (C), and hydroclimate proxies from Tswaing Crater, South Africa ( Partridge et al., 1997 ) and the Gulf of Aden (δD values multiplied by −1 for comparability with the Tswaing Crater record; Tierney et al., 2017...
FIGURES
Image
Proposed chronostratigraphic framework for the late Quaternary of southern ...
Published: 01 December 2021
Carbon for Tswaing Crater ( Partridge et al., 1993 ), ( e ) and ( f ) pollen records of Fynbos and Aquatic:Riparian proportions from Vankervelsvlei ( Quick et al., 2016 ), ( g ) Alkenone-based SST reconstruction for offshore southeast Atlantic, within the Benguela Current ( Kirst et al., 1999 ), ( h
Image
Impact glass from the ~200 ka <span class="search-highlight">Tswaing</span> impact <span class="search-highlight">crater</span>, South Africa. P hoto b...
Published: 01 February 2012
Impact glass from the ~200 ka Tswaing impact crater, South Africa. P hoto by F red J ourdan
Journal Article
Published: 01 December 2021
South African Journal of Geology (2021) 124 (4): 843–862.
... Carbon for Tswaing Crater ( Partridge et al., 1993 ), ( e ) and ( f ) pollen records of Fynbos and Aquatic:Riparian proportions from Vankervelsvlei ( Quick et al., 2016 ), ( g ) Alkenone-based SST reconstruction for offshore southeast Atlantic, within the Benguela Current ( Kirst et al., 1999 ), ( h...
FIGURES
Journal Article
Journal: Geology
Published: 01 July 2011
Geology (2011) 39 (7): 671–674.
... systematic of the Lonar melt rocks have not been affected by any postimpact thermal event. However, examples, such as impact glasses from the Tswaing crater in Africa ( Jourdan et al., 2007 ), make us urge caution about dating very young impact craters with the 40 Ar/ 39 Ar technique due to the pervasive...
FIGURES
Image
Figure 3. Examples of late Quaternary paleoclimatic records, showing the la...
Published: 01 March 2007
(Antarctica), shown as a difference from the modern surface temperature value of −55.5 °C ( Petit et al., 1999 ). (B) Annual precipitation derived from textural analysis of sediments recovered from the upper part of the radiocarbon-dated Tswaing Crater (Pretoria Saltpan) core ( Partridge et al., 1997 ). (C
Image
Proxy records for the southern Kalahari and eastern fringes of the southern...
Published: 01 December 2021
), (l) key proxies from the Tswaing Crater (site 68) record, left to right is: sediment grain-size derived precipitation record ( Partridge et al., 1997 ), total organic carbon (TOC) and total nitrogen (TN) ( Kristen et al., 2007 ) and δDwax and δ 15 N ( Schmidt et al., 2014 ).
Journal Article
Journal: Geology
Published: 01 November 2002
Geology (2002) 30 (11): 995–998.
... ( Füchtbauer et al., 1977 ; Jankowski, 1977 ) and the Pleistocene Tswaing crater in South Africa ( Partridge, 1999 ). At both these sites, however, the bolide struck a subaerial target, and no marine sediments accumulated following the impact. At Ries, the postimpact sediments accumulated in playa lakes...
FIGURES | View All (5)
Journal Article
Published: 01 December 2021
South African Journal of Geology (2021) 124 (4): 1047–1054.
... sites (over forty) but most of these are for the Late Quaternary, from ~50 ka to the late Holocene. There are very few records from ~256 ka, e.g. Florisbad, and ~100 ka for coastal sites, and for Tswaing Crater and Wonderwerk Cave, both inland sites. Many archaeological sites have interrupted records...
FIGURES
Image
( a ) Map of southern Africa with locations of: Lake <span class="search-highlight">Tswaing</span> (T, 25°24′30″ ...
Published: 01 September 2007
Figure 1. ( a ) Map of southern Africa with locations of: Lake Tswaing (T, 25°24′30″ S, 28°04′59″ E), Wonderkrater (W), Makapansgat (M), Gladysvale Cave (C), Tsodilo Hills, northwestern Kalahari (K), Lake Masoko, Tanzania (G), Lake Malawi (L) and Alexandersfontein (A). Dune and cave studies
Image
Robert S. Dietz (1914 to 1995): oceanographer, geophysicist and pioneer of ...
Published: 01 March 2007
, pioneer of Planetary Geology and Impact Cratering studies, at the Tswaing meteorite crater, South Africa. Dr. Carolyn Shoemaker, herself famous for the discovery of numerous comets and asteroids, and Dr. Robin Brett (then president of the International Union of Geological Surveys) unveiled the memorial
Image
Robert S. Dietz (1914 to 1995): oceanographer, geophysicist and pioneer of ...
Published: 01 March 2007
, pioneer of Planetary Geology and Impact Cratering studies, at the Tswaing meteorite crater, South Africa. Dr. Carolyn Shoemaker, herself famous for the discovery of numerous comets and asteroids, and Dr. Robin Brett (then president of the International Union of Geological Surveys) unveiled the memorial
Journal Article
Published: 01 March 2007
South African Journal of Geology (2007) 110 (1): 1–46.
... on an initial diagram by Chapman and Morrison (1994) . K/P = Cretaceous/Paleogene boundary event (= Chicxulub impact event). Tswaing crater would plot together with Meteor Crater of the same size, and Vredefort would be located in this plot to the southeast of the K/P impact. ...
FIGURES | View All (28)