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Heine, K. 2004. Flood Reconstructions in the Namib Desert, Namibia and Little Ice Age Climatic Implications: Evidence from Slackwater Deposits and Desert Soil Sequences. Journal Geological Society of India, 64: 535-547


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Flood Reconstructions in the Namib Desert, Namibia and Little Ice Age Climatic Implications: Evidence from Slackwater Deposits and Desert Soil Sequences.

Summary / Notes:

Abstract: Fluvial silts, accumulated in some Namib Valleys, to date are interpreted as records of reduced precipitationrnin the catchments. Our investigations show that these fluvial silts are slackwater deposits (SWD) which document hydrologic and climatic conditions during the late Holocene that cause extreme flash floods in the valleys. We describe SWDs of some Namibian Desert valleys and present 14C dates of their ages. The youngest accumulation phase occurred during the Little Ice Age (LIA, ca. AD 1300 to 1850). The biggest flash floods of the LIA, in most catchments, experienced water levels in the valleys that exceeded the most extreme floods of the last 100 to 150 years. In the northwestern Namib Desert, flash floods of the LIA were more frequent and more extreme than in the central Namib Desert. This may be caused by small shifts of the tropical-temperate-troughs (TTT) in southern Africa and the southwest Indian Ocean that correlate with changes of cosmic ray intensity. Keywords: Slackwater deposits, Palaeofloods, Little Ice Age, Namib Desert (Namibia).

Year: 2004

Type: Journal Article

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