Weisrock, A. and Rousseau, L. and Reyss, J.-L. and Falguères, C. and Ghaleb, B. and Bahain, J.-J. and Beauchamp, J. and Boudad, L. and Mercier, N. and Mahieux, G. and Pozzi, J.-P. and Janati-Idrissi, N. and Ouammou, A. (2008) Travertines of the Moroccan Sahara northern border: Morphological settings, U-series datings and palaeoclimatic indications Travertins de la bordure nord du Sahara Morocain: Dispositifs morphologiques, datations U/Th et indications paléoclimatiques. Geomorphologie: Relief, Processus, Environnement (3). pp. 153-168.

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Abstract

In arid countries, the dating of travertines has led to establish a chronology of humid phases. Waterfall, fluvial and hydrothermal Quaternary travertines were sampled at the northern border of the Moroccan Sahara and dated by the U-series and TIMS methods. The results indicate that travertine formation occurred prior to MIS 11, during MIS 9-8, scarcely during MIS 5, and mainly during MIS 3 and MIS 2. The relationship between travertines and wet phases is verified at the Quaternary time scale. At a short recent scale, the constructions occurred about 50, 30 and 15 ka BP, seemingly linked to subtropical eastern Atlantic cooling. But the geomorphological setting induces in each case differences in travertine growth, such as a later response of the hydrothermal mounds to the rainfall increase, or an earlier drought in the fluvial deposits. As a result, travertines are discontinuous deposits in arid continental environments, including both global and regional distinct signals.

Item Type: Article
Subjects: Earth and Planetary Sciences
Divisions: SCIENTIFIC PRODUCTION > Earth and Planetary Sciences
Depositing User: Administrateur Eprints Administrateur Eprints
Last Modified: 31 Jan 2020 15:46
URI: http://eprints.umi.ac.ma/id/eprint/2941

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