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Science. 2006 Feb 10;311(5762):821.

The age of the Sahara desert.

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1
Université Bretagne Occidentale, Institut Universitaire Européen de la Mer, Domaines Océaniques, CNRS Unité Mixte de Recherche (UMR) 6538, 1 place Nicolas Copernic, 29280 Plouzané, France. schuster@univ-brest.fr

Abstract

In the Sahara region, the age of onset of the desert condition has been uncertain until now. Here we report on the discovery of 7,000,000-year-old eolian dune deposits from the northern Chad Basin. This geological archive is the oldest known evidence for desert occurrence in the Sahara.

PMID:
16469920
DOI:
10.1126/science.1120161
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