U/Th dating of a Quaternary travertine from southern Morocco: palaeoclimatic consequences during Middle and Upper Pleistocene

U/Th dating of a Quaternary travertine from southern Morocco: palaeoclimatic consequences during Middle and Upper Pleistocene

A large travertine outcrop south of Errachidia, southern Morocco, was studied and U/Th dated. The carbonate fraction was provided by groundwaters then, as now, from the eastern High Atlas percolating through the regional Infra-Cenomanian aquifer. There were two main periods of accumulation at ca 262...

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Veröffentlicht in:Comptes rendus. Geoscience 2003-05, Vol.335 (5), p.469-478
Hauptverfasser: Boudad, Larbi, Kabiri, Lahcen, Farkh, Samer, Falgueres, Christophe, Rousseau, Louis, Beauchamp, Jacques, Nicot, Elisabeth, Cairanne, Guillaume
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container_end_page 478
container_issue 5
container_start_page 469
container_title Comptes rendus. Geoscience
container_volume 335
creator Boudad, Larbi
Kabiri, Lahcen
Farkh, Samer
Falgueres, Christophe
Rousseau, Louis
Beauchamp, Jacques
Nicot, Elisabeth
Cairanne, Guillaume
description A large travertine outcrop south of Errachidia, southern Morocco, was studied and U/Th dated. The carbonate fraction was provided by groundwaters then, as now, from the eastern High Atlas percolating through the regional Infra-Cenomanian aquifer. There were two main periods of accumulation at ca 262 kyr BP and 20-11.5kyr BP separated by a long discontinuity with some limited weathering and erosion and correlated in part with a period of erosion at 30-20kyr BP further to the west. The two travertine-deposition periods suggest increased rainfall and/or cooler thermal conditions in the eastern High Atlas source regions. Massive travertine accumulation ceased at the end of the Upper Pleistocene. To cite this article: L.Boudad et al., C. R. Geoscience 335 (2003).
doi_str_mv 10.1016/S1631-0713(03)00081-6
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title U/Th dating of a Quaternary travertine from southern Morocco: palaeoclimatic consequences during Middle and Upper Pleistocene
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