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May, S.M., Willershäuser, T., Vött, A.. Boulder Transport by high-energy wave events at Cap Bon (NE Tunisia). In: Schwarzer, K., Schrottke, K., Stattegger, K. (eds.). From Brazil to Thailand - New Results in Coastal Research. Coastline Reports (16), pp. 1-10. EUCC - Die Küsten Union Deutschland e.V., Rostock, 2010.


The Mediterranean is characterized by a considerable seismic and geodynamic activity resulting in a high tsunamigenic potential, particularly for the central and eastern Mediterranean. Within the last decades, numerous studies dealing with deposits caused by extreme events revealed recurrent tsunami events in the Mediterranean throughout the Holocene. In general, two main types of extreme wave event deposits have been described so far: (i) fine-grained allochthonous marine sediments found in near-coast geological archives and (ii) wave-emplaced block deposits along rocky shorelines. However, in many cases, there is an ongoing debate on whether these deposits were accumulated by tsunami or storm events.

This paper presents, for the first time, evidence of block accumulations from the north-eastern coasts of Tunisia induced by extreme wave events. Along the north-western coast of Cap Bon, several block fields and wave-transported boulders were detected. The blocks are partly arranged in the form of imbrication trains up to 4 m a.s.l. Many boulders show two distinct rock pool generations allowing for a relative chronological interpretation. Furthermore, the presented results point to a tsunami-induced transport of the blocks rather than to a storm-induced dislocation.
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