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dc.contributor.author M. A. J. en_US
dc.contributor.author F. M. en_US
dc.contributor.author G. A. T. en_US
dc.contributor.author R. N. en_US
dc.contributor.author O. A. M. en_US
dc.contributor.author T. T. en_US
dc.contributor.author M. en_US
dc.contributor.author J. en_US
dc.contributor.author M. R. en_US
dc.contributor.author D. en_US
dc.contributor.author J. en_US
dc.date.accessioned 2011-05-13T10:00:31Z
dc.date.available 2011-05-13T10:00:31Z
dc.date.issued 2010-05 en_US
dc.identifier http://dx.doi.org/10.1016/j.quascirev.2010.02.018 en_US
dc.identifier.citation Williams , M A J , Williams , F M , Duller , G A T , Munro , R N , El Tom , O A M , Barrows , T T , Macklin , M , Woodward , J , Talbot , M R , Haberlah , D & Fluin , J 2010 , ' Late Quaternary floods and droughts in the Nile valley, Sudan: new evidence from optically stimulated luminescence and AMS radiocarbon dating ' Quaternary Science Reviews , vol 29 , no. 9-10 , pp. 1116-1137 . , 10.1016/j.quascirev.2010.02.018 en_US
dc.identifier.other PURE: 159632 en_US
dc.identifier.other dspace: 2160/6727 en_US
dc.identifier.uri http://hdl.handle.net/2160/6727
dc.description.abstract Our results show that the late Pleistocene Nile in northern Sudan was shifting position and actively aggrading at 145 +/- 20 kyr, 83 +/- 24 kyr, 32 +/- 8 kyr and 20.7 +/- 0.2 kyr and indicate, for the first time, a phase of high-energy flow in the White Nile at 27.8 +/- 3.2 kyr, with still high but somewhat reduced flow in that river at 13.3 kyr, 10 kyr and 4.8-4.0 kyr. Beach ridges associated with a 386 m strandline of the White Nile have OSL ages of 27.5 +/- 2.7 kyr and 14.5 +/- 1.6 kyr. The Holocene terraces and former channels of the main Nile have ages of 11 kyr, 6.5-5.0 kyr and 4.8-4.0 kyr, after which there was a general decline in flood discharge. The now arid main Nile valley in northern Sudan was significantly wetter during the early to middle Holocene, with a lake up to 450 km(2) in area, fed by an overflow channel from the early Holocene Nile between 9.5 kyr and 7.5 kyr. Previously stable late Pleistocene dunes were reactivated at intervals during the Holocene, with five samples from the White Nile valley indicating brief phases of Holocene dune activity at 9.9 +/- 2.0 kyr, 9.0 +/- 2.8 kyr, 6.6 +/- 0.9 kyr, 4.8 +/- 0.9 kyr and 2.9 +/- 0.5 kyr, the earliest of which occurred within periods of generally wetter climate and higher Nile flow. The youngest freshwater shells on the Khor Abu Habl alluvial fan west of the White Nile correspond to a time of regionally wetter climate between 1.7 and 1.0 kyr. Our results suggest that millennial scale climatic instability may have been characteristic of Holocene climates in this region. (C) 2010 Elsevier Ltd. All rights reserved. en_US
dc.format.extent 22 en_US
dc.relation.ispartof Quaternary Science Reviews en_US
dc.subject MEDITERRANEAN SEDIMENTS en_US
dc.subject LAST GLACIAL MAXIMUM en_US
dc.subject EAST-AFRICA en_US
dc.subject ARABIAN PENINSULA en_US
dc.subject LATE PLEISTOCENE DESICCATION en_US
dc.subject WHITE-NILE en_US
dc.subject DIATOM RECORD en_US
dc.subject LAKE VICTORIA en_US
dc.subject HOLOCENE CLIMATIC OPTIMUM en_US
dc.subject STABLE-ISOTOPE en_US
dc.title Late Quaternary floods and droughts in the Nile valley, Sudan: new evidence from optically stimulated luminescence and AMS radiocarbon dating en_US
dc.contributor.pbl Institute of Geography & Earth Sciences en_US
dc.contributor.pbl Quaternary Environmental Change Group en_US
dc.contributor.pbl River Basin Dynamics and Hydrology en_US


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