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Two high levels of continental waters in the southern Tunisian chotts at about 90 and 150 ka

1989; Geological Society of America; Volume: 17; Issue: 10 Linguagem: Inglês

10.1130/0091-7613(1989)017 2.3.co;2

1943-2682

Christiane Causse, Roger Coque, J.Ch. Fontes, Françoise Gasse, E. Gibert, H. Ben Ouezdou, Kamel Zouari,

Maritime and Coastal Archaeology

Research Article| October 01, 1989 Two high levels of continental waters in the southern Tunisian chotts at about 90 and 150 ka C. Causse; C. Causse 1Laboratoire de Géologie du Quaternaire, CNRS Luminy, Case 907, 1328 Marseille Cedex 09, France Search for other works by this author on: GSW Google Scholar R. Coque; R. Coque 2Institut de Géographie, 191, rue St-Jacques, 75005 Paris, France Search for other works by this author on: GSW Google Scholar J. Ch. Fontes; J. Ch. Fontes 3Laboratoire d'Hydrologie et de Géochimie Isotopique, Université Paris-Sud Bâtiment 504, 91405 Orsay Cedex, France Search for other works by this author on: GSW Google Scholar F. Gasse; F. Gasse 4CNRS-UA 723, Université Paris-Sud, Bâtiment 504, 91405 Orsay Cedex, France Search for other works by this author on: GSW Google Scholar E. Gibert; E. Gibert 3Laboratoire d'Hydrologie et de Géochimie Isotopique, Université Paris-Sud Bâtiment 504, 91405 Orsay Cedex, France Search for other works by this author on: GSW Google Scholar H. Ben Ouezdou; H. Ben Ouezdou 5Centre des Sciences de la Terre, INRST, B.P. 95, Hammam-Lif 2050, Tunisia Search for other works by this author on: GSW Google Scholar K. Zouari K. Zouari 3Laboratoire d'Hydrologie et de Géochimie Isotopique, Université Paris-Sud Bâtiment 504, 91405 Orsay Cedex, France Search for other works by this author on: GSW Google Scholar Geology (1989) 17 (10): 922–925. https://doi.org/10.1130/0091-7613(1989)017 2.3.CO;2 Article history first online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation C. Causse, R. Coque, J. Ch. Fontes, F. Gasse, E. Gibert, H. Ben Ouezdou, K. Zouari; Two high levels of continental waters in the southern Tunisian chotts at about 90 and 150 ka. Geology 1989;; 17 (10): 922–925. doi: https://doi.org/10.1130/0091-7613(1989)017 2.3.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Uranium and thorium content and activity ratios were measured on 20 samples (19 molluscs and 1 calcareous concretion) from the Great Chotts in southern Tunisia. Results were studied by the isochron method and by age frequency histograms. They suggest that two major flood episodes took place about 150 and 90 ka. Uranium activity ratios indicate a ground-water supply of continental origin, in agreement with biological indicators, which show large variations in salinity from fresh to marine-like conditions. The existence of a lacustrine phase, radiocarbon dated to 17-40 ka, as previously suggested for the northern Sahara, is highly questionable. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.