2021
DOI: 10.1002/dep2.163
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The Late Palaeozoic Ice Age unconformity in southern Namibia viewed as a patchwork mosaic

Abstract: This is an open access article under the terms of the Creat ive Commo ns Attri bution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Cited by 9 publications
(7 citation statements)
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“…Namibia hosts one of the highest fidelity records of the late Paleozoic glaciation, preserving ancient fjord networks, a complex basal unconformity that extends for 100's of kms in outcrop and large linear erosional features including drumlins, which attest to the subglacial history of this region (Figs 2 and 3B;Martin 1981;Dietrich et al, 2019;Andrews et al, 2019;le Heron et al, 2021). During the acme of the LPIA a large, at least 1.7 km thick, ice sheet covered northern Namibia (Dietrich et al, 2021).…”
Section: Kalahari Basinmentioning
confidence: 99%
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“…Namibia hosts one of the highest fidelity records of the late Paleozoic glaciation, preserving ancient fjord networks, a complex basal unconformity that extends for 100's of kms in outcrop and large linear erosional features including drumlins, which attest to the subglacial history of this region (Figs 2 and 3B;Martin 1981;Dietrich et al, 2019;Andrews et al, 2019;le Heron et al, 2021). During the acme of the LPIA a large, at least 1.7 km thick, ice sheet covered northern Namibia (Dietrich et al, 2021).…”
Section: Kalahari Basinmentioning
confidence: 99%
“…Ultimately, these valleys were filled with marine rocks and given the scale and well-preserved nature of the deposits are regarded as one of the world's best-preserved examples of a pre-Cenozoic fjord network (Dietrich et al, 2021;Le Heron et al, 2022). In southern Namibia, equally impressive outcrops within the Aranos and Karasburg subbasins of the greater Kalahari, record a complex system of fluvial incision, subglacial erosion, and ice proximal deposits, which overlie unconformably Precambrian-Cambrian basement attesting to the growth and progradation of ice across this region (Stollhofen et al, 2008;Le Heron et al, 2021). Boulder beds striated and polished surfaces, and subglacial shearing of unconsolidated sediments are documented across these regions and confirm subglacial and proglacial conditions (Figs.…”
Section: Kalahari Basinmentioning
confidence: 99%
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“…In areas with Dwyka Group sediments in Namibia, interpreted to be subglacial, the basal unconformity below diamictites may be highly irregular and heterogenous, with areas of sediment injections into the underlying basement, and 'elongated boul-ders' of sediment displaying fractures (Le Heron et al, 2021), i.e., an appearance partly similar to jigsaw-puzzle textures which are common in sediment gravity flow deposits (Dufresne et al, 2021;Molén 2021). Furthermore, in Namibia, Martin (1981) described 'pre-glacial valleys' that were glaciated and also crossed obliquely by glaciers.…”
Section: Geology Of the Dwyka Groupmentioning
confidence: 99%
“…In Western Gondwana, glacial stages or advances and retreats were frequent in the Carboniferous (Ezpeleta et al 2020, Le Heron et al 2021, López Gamundí et al 2021.…”
Section: A C C E P T E D Mmentioning
confidence: 99%