Palaeogeography of the Gezira and of the lower Blue and White Nile valleys.
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Describes the evolution of the Blue Nile in the Late Pleistocene and Holocene. Chronological evidence is provided by volcanic ashes and dates on carbonates and fossil shells. Paleochannels were formed during a wet phase about 11-12 000 yr ago. The second section describes the evolution of the White Nile which shows a similar phase of flooding in the terminal Pleistocene and the early Holocene. Sections dug at Jebel Tomat and Shabona are used to reconstruct the Holocene environment. The chronology is summarised in the conclusion. -K.Clayton
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