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Ghaub Formation

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Journal Article
Journal: Geology
Published: 01 September 2004
Geology (2004) 32 (9): 817–820.
...K.-H. Hoffmann; D.J. Condon; S.A. Bowring; J.L. Crowley Abstract Dropstone-bearing glaciomarine sedimentary rocks of the Ghaub Formation within metamorphosed Neoproterozoic basinal strata (Swakop Group) in central Namibia contain interbedded mafic lava flows and thin felsic ash beds. U-Pb zircon...
FIGURES | View All (4)
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Outcrop characteristics of <span class="search-highlight">Ghaub</span> <span class="search-highlight">Formation</span> diamictites exposed at Haartbees...
Published: 29 May 2018
Fig. 10.— Outcrop characteristics of Ghaub Formation diamictites exposed at Haartbeespoort Farm, Otavi Mountainland of northern Namibia. Refer to Figure 9 for stratigraphic context. A) Pebble- to cobble-size, well rounded sandstone clasts punctuating well stratified carbonate-rich diamictite
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Reconnaissance measured sections of the <span class="search-highlight">Ghaub</span> <span class="search-highlight">Formation</span> on Fransfontein hom...
Published: 01 July 2011
Figure 4. Reconnaissance measured sections of the Ghaub Formation on Fransfontein homocline east of district road C35 ( Figs. 2A and 2B ), corresponding to columns 6–14 in Figure 3 . The prograded and semi-amalgamated diamictite complex of the main Ghaub Formation contrasts with lateral
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Outcrop images of the Bethanis Member of the <span class="search-highlight">Ghaub</span> <span class="search-highlight">Formation</span> illustrating t...
Published: 01 July 2011
Figure 13. Outcrop images of the Bethanis Member of the Ghaub Formation illustrating the following: (A) and (E) megaboulders of dolomitic stromatolite concentrated in base of Bethanis Member exposed in single outcrop (see Fig. 6 ) from left (A) to right (E) (note draping [white lines] of thinner
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Bedding and clast characteristics of the <span class="search-highlight">Ghaub</span> <span class="search-highlight">Formation</span> illustrating the f...
Published: 01 July 2011
Figure 14. Bedding and clast characteristics of the Ghaub Formation illustrating the following: (A–G, J) dropstone structures and clasts of all sizes, from boulders (A), cobbles (B, J), and pebbles (D, E–G) to granules (C). Note the interlaminated facies of mudstone associated with the ice-rafted
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Schematic of the relative thickness of the <span class="search-highlight">Ghaub</span> <span class="search-highlight">Formation</span> along a east to ...
Published: 01 July 2011
Figure 16. Schematic of the relative thickness of the Ghaub Formation along a east to west transect, parallel to the slope Refer to Figures 3–8, and 10 for information on the internal character of the Ghuab Formation as summarized in this diagram. Top insets (south to north sections) illustrate
Journal Article
Published: 01 December 2005
South African Journal of Geology (2005) 108 (4): 557–577.
... break, where the seafloor would have been 550 to 800 m below the top of the platform based on modern analogs. The eastern third of the ridge angles up the foreslope to the platform edge. The Ghaub Formation is a sharply-bounded wedge of glacial marine strata that blankets the lower foreslope and tapers...
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Journal Article
Journal: GSA Bulletin
Published: 01 July 2011
GSA Bulletin (2011) 123 (7-8): 1448–1477.
...Figure 4. Reconnaissance measured sections of the Ghaub Formation on Fransfontein homocline east of district road C35 ( Figs. 2A and 2B ), corresponding to columns 6–14 in Figure 3 . The prograded and semi-amalgamated diamictite complex of the main Ghaub Formation contrasts with lateral...
FIGURES | View All (16)
Journal Article
Published: 29 May 2018
Journal of Sedimentary Research (2018) 88 (5): 659–677.
...Fig. 10.— Outcrop characteristics of Ghaub Formation diamictites exposed at Haartbeespoort Farm, Otavi Mountainland of northern Namibia. Refer to Figure 9 for stratigraphic context. A) Pebble- to cobble-size, well rounded sandstone clasts punctuating well stratified carbonate-rich diamictite...
FIGURES | View All (11)
Journal Article
Journal: Geology
Published: 01 January 2002
Geology (2002) 30 (1): 35–38.
.... 600 Ma Ghaub Formation (Congo craton), Blässkrans Formation (northwestern Kalahari craton) and Wildrose Diamictite (southwestern Laurentia), and the post–595 Ma lower Southern Highland Group (northeast Laurentia). These dropstone intervals are interstratified with hemipelagic, dropstone-free...
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Field photographs from the Fransfontein foreslope (see Figure 9  for locati...
Published: 01 December 2005
Figure 10. Field photographs from the Fransfontein foreslope (see Figure 9 for locations). ( a ) Stratified proglacial carbonate (grey limestone and tan dolostone) with ice-rafted debris, grading upward into massive ‘rain-out’ diamictite, Ghaub Formation lower member, section 8. ( b ) Finely
Series: Geological Society, London, Special Publications
Published: 01 January 2009
DOI: 10.1144/SP326.15
EISBN: 9781862395749
..., of special economic interest. This paper concentrates on the Ghaub Formation diamictite interval in northern Namibia and the major environmental change in the aftermath of the assumed glaciation. The relationship of the post-glacial sediments with the underlying different types of cap carbonate...
FIGURES | View All (14)
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Field photographs from the Fransfontein Ridge (see Figure 9  for locations)...
Published: 01 December 2005
limestone and tan dolostone) in stratified proglacial carbonate of the Ghaub Formation upper member, section 12. ( c ) Fine grainstone with southerly-directed climbing ripples seen in oblique section, Ghaub Formation middle member, section 9. Note ice-rafted dropstone in upper left. ( d ) Stratified
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Photomaps and measured columnar sections in key sectors of the Fransfontein...
Published: 01 December 2005
Figure 12. Photomaps and measured columnar sections in key sectors of the Fransfontein Ridge. ( a ) Central sector (sections 18 to 23) showing the double-crested moraine ridge of the Ghaub Formation and the axial zone of the underlying grainstone prism. ( b ) Sector west of the Duurwater Trough
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Outcrop images of intervals in the Ghuab <span class="search-highlight">Formation</span> illustrating: (A) thin i...
Published: 01 July 2011
shear deformation in proximity to contact), (D) abrupt contact of the Franni-aus intraclast breccias with the orange, dolomitic, siltstone of the lower Ghaub Formation (see Fig. 7 ), (E) disconformity of the lower Ghaub Formation orange, dolomitic siltstone with underlying Franni-aus breccia (see Fig
Journal Article
Journal: Geology
Published: 01 August 2016
Geology (2016) 44 (8): 631–634.
... from widely separated localities of the Marinoan-equivalent Ghaub Formation in Namibia: 639.29 ± 0.26 Ma and 635.21 ± 0.59 Ma. These findings verify, for the first time, the key prediction of the snowball Earth hypothesis for the Marinoan glaciation, i.e., longevity, with a duration of ≥4 m.y...
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Autochthonous columnar sections of the Abenab and basal Tsumeb Subgroups on...
Published: 01 June 2017
), also the base of the Ediacaran Period. Soutput fault slip ended by middle Ghaub Formation time, and Toekoms by Rasthof Formation time. Soutput fault was not structurally inverted, likely because its strike nearly parallels the direction of Damaran shortening. Note localized thickening of the Marinoan
Series: Geological Society, London, Memoirs
Published: 01 January 2011
DOI: 10.1144/M36.14
EISBN: 9781862394117
... trough and moraine, and district road C35. A glacial origin for the carbonate-clast diamictite (now Ghaub Formation) on the Fransfontein foreslope (Fig.  14.1 b) was rejected by Frets (1969) , who favoured submarine landsliding in response to a fall in base level. This view was taken up by Martin...
FIGURES | View All (5)
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Cryogenian columnar sections from the autochthonous panel of Bethanis and S...
Published: 01 June 2021
Figure 6. Cryogenian columnar sections from the autochthonous panel of Bethanis and Soutput sub-basins ( Hoffman et al., 2021 ). See Figure 4 for section locations. Note thickening of Chuos (Ac), Berg Aukas (Aa), Okonguarri (Ao), Narachaams (An) and lower Ghaub (Tg) formations toward Soutput
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Oblique aerial photo mosaic of outcrop of Ghuab <span class="search-highlight">Formation</span> found in drainage...
Published: 01 July 2011
Figure 6. Oblique aerial photo mosaic of outcrop of Ghuab Formation found in drainage. Contacts of lithofacies within Ghaub Formation are indicated, as well as bold lines of the contact with the Franni-aus Member of the Ombaatjie Formation, dashed line indicates dolomitization front. Location