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Evolution du Sahara tunisien au Pléistocène récent et à l'Holocène

Abstract : In the Neo-Cretaceous monoclinal plateau of the Dahar, the altitude progressively decreases from some 600 m in the N-E to some 250 m at the "Erg Oriental" border. A semi-extinct subsequent hydrographic system has been cut in the plateau during interglacial pleistocene phases. It was partially infilled of reddish sand in the Late Pleistocene dry period. With the Early Holocene humid phasis, terraces and fluvio-lacustrine deposits have been formed along the main ouadis, overlain by a travertine in some places, and associated with lamellar artefacts. Near the border of the Erg, paleolakes were formed by brakish waters (Cerastoderma glaucum). The holocene arid period caused the movement of sands forming the new ergs of Jeneien and Lorzot and the "remlas".
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Contributor : Jean-Louis BALLAIS Connect in order to contact the contributor
Submitted on : Thursday, July 20, 2017 - 2:57:49 PM
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Pierre Félix Burollet, Nicole Petit-Maire, Jean-Louis Ballais, Michel Fontugne, Jean-Claude Rosso, et al.. Evolution du Sahara tunisien au Pléistocène récent et à l'Holocène. Nicole Petit-Maire, André Simonin. Déserts. Passé, présent, futur, Editions du Comité des Travaux Historiques et Scientifiques, pp.23-29, 1992, 2-7355-0273-2. ⟨hal-01563265⟩



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