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The Holocene
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Centennial-scale late-Pleistocene to mid-Holocene synthetic profile of the Medjerda Valley, northern Tunisia

Christoph Zielhofer

Department of Physical Geography, Technical University of Dresden, 01062 Dresden, Germany; Department of Geography and Regional Research, University of Vienna, 7070 Vienna, Austria christoph.zielhofer{at}mailbox.tu-dresden.de

Dominik Faust

Department of Physical Geography, Technical University of Dresden, 01062 Dresden, Germany

Rafael Baena Escudero

Fernando Diaz del Olmo

Department of Physical Geography, University of Seville, 41004 Seville, Spain

Annette Kadereit

Archaeometry Research Group, Heidelberg Academy of Sciences, 69029 Heidelberg, Germany

Klaus-Martin Moldenhauer

Department of Physical Geography, Catholic University of Eichstdtt, 85072 Eichstdtt, Germany

Ana Porras

Department of Physical Geography, University of Seville, 41004 Seville, Spain

During the late Pleistocene to mid-Holocene, the Medjerda river system in Mediterranean Tunisia shows events of increased flooding and aggradation of relatively coarse overbank deposits. Geomorphic activity in river systems within this region correlate with aridification of the climate, but not with temperature. The late-Pleistocene to mid-Holocene synthetic profile of the Ghardimaou floodplain (mid-Medjerda river) indicates fluvial activity from 12.4 to 11.8, 6.6 to 6.0 and after 4.8 ka cal. BP. External correlations imply global and regional causes of the late-Pleistocene to mid-Holocene climatic development such as North Atlantic deep-water formation, fluctuations in Saharan humidity and impacts of local Mediterranean weather phenomena. Palaeomagnetic records offer additional opportunities to interpret fluvial activity in river systems, especially for detecting chronological hiatuses in apparently homogeneous sediment sequences.

Key Words: Chronostratigraphy • floodplain stratigraphy • Tunisia • Mediterranean • fluvial dynamics • aggradation • overbank deposits • palaeohydrol palaeomagnetics • Younger Dryas • Holocene

The Holocene, Vol. 14, No. 6, 851-861 (2004)
DOI: 10.1191/0959683604hl765rp
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