Chronology of Upper Pleistocene sequences at Sidi Messaoud (wadi Noun, southwestern Morocco) based on C, optical and U-series dating |
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| Authors: | Norbert Mercier, Christine Hatt , Michel Fontugne, Jean-Louis Reyss, H l ne Valladas, Luc Wengler, Jean-Philip Brugal, Abderrahmane Ouammou,Andr Weisrock |
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| Affiliation: | aLaboratoire des Sciences du Climat et de l'Environnement, Unité mixte CNRS-CEA, Avenue de la Terrasse, 91198 Gif-sur-Yvette Cedex, France;bUniversité de Perpignan, Faculté de Lettres et Sciences Humaines, LAPREGEC, 66860 Perpignan, France;cUMR 6636 du CNRS, Maison Méditerranéenne des Sciences de l'Homme – BP 647, 5 rue du Château de l'Horloge, 13094 Aix-en-Provence, France;dUniversité Ibn Zohr, Faculté des Lettres, Département de Géographie, B.P. 29 S, Agadir, Maroc;eUniversité Nancy 2, Campus de Lettres et Sciences Humaines, 54000 Nancy, France |
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| Abstract: | The Sidi Messaoud site provides a 40 m thick sedimentary infilling of great importance for the study of environmental changes and landscape evolution during the Upper Pleistocene in the Western Sahara. In this study, chronological results obtained by the 14C, U-series and optical dating techniques are compared. Each individual age, depositional environment and post-deposition history of the various samples are evaluated, in order to explain the methodological reasons for discordances and concordances. Stratigraphic and palaeoenvironmental implications for the last 120 ka history in southwestern Morocco are also inferred: the wadi Noun gorges had been incised before MIS 5, and later, during MIS 3, the valley has been filled in with a mean sedimentation rate of  1 m/ka. |
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| Keywords: | Luminescence U-series C-14 dating Upper Pleistocene wadi Noun Morocco |
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