Fluvial sediments and playa deposits of the Naukluft Mts. foreland and Tsauchab Valley, Namibia – New insights from key sections in the Late Quaternary landscape and climate change in Southern Africa

Völkel, Jörg; Bens, Oliver; Eden, Marie; Krauß, Lydia; Murray, Andrew; Heine, Klaus

doi:10.1127/zfg/2021/0705

Cited by 2 publications

(1 citation statement)

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“…Where preserved, studies in South Africa and Namibia of slackwater sediments, 'river end' deposits, and thick alluvial palaeosol successions (e.g. Benito et al, 2011;Eitel et al, 2005;Heine, 2004;Lyons et al, 2014;Völkel et al, 2021;Zawada, 1997Zawada, , 2000 have furnished some key information, but in regions like the Kalahari, relatively little progress has been made in extracting quantitative palaeohydrological information from spatially extensive palaeochannels and other fluvial landforms.…”

Section: Introductionmentioning

confidence: 99%

Significantly enhanced mid Holocene fluvial activity in a globally important, arid‐zone wetland: The Okavango Delta, Botswana

Tooth

McCarthy

Duller

et al. 2022

Earth Surf Processes Landf

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Information on past dryland environments is commonly derived from geomorphological landforms and sediments ('geoproxies'). The Okavango Delta in the middle Kalahari, Botswana, has been subject to a long history of arid-humid transitions but its potentially rich archive of fluvial geoproxies is largely untapped. Previous palaeoenvironmental studies in the Delta region have focused mainly on aeolian dunes, lacustrine beach ridges, and rare pollen sequences in surrounding locations, and the Delta's channel dynamics have remained poorly constrained, both chronologically and in quantitative palaeohydrological terms. Focusing on the Delta's Xugana region, we present the first optically stimulated luminescence ages for palaeochannel fills and scroll bars, revealing significantly enhanced fluvial activity in the $7-4 ka interval. Along 120-150 m-wide, sand-bed, sinuous palaeochannels, lateral migration and bend cutoffs were driven by palaeodischarges up to $350-450 m 3 s À1 , at least nine

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