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

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...

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Bibliographic Details
Published in:The Holocene
Main Authors: Zielhofer, Christoph, Faust, Dominik, Escudero, Rafael Baena, del Olmo, Fernando Diaz, Kadereit, Annette, Moldenhauer, Klaus-Martin, Porras, Ana
Format: Article in Journal/Newspaper
Language:English
Published: SAGE Publications 2004
Subjects:
North Atlantic Deep Water
North Atlantic
Online Access:http://dx.doi.org/10.1191/0959683604hl765rp
http://journals.sagepub.com/doi/pdf/10.1191/0959683604hl765rp
Description
Summary: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.

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