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Active tectonics and paleotsunami records of the Northern coast of Egypt

Abstract : Seismotectonic, paleotsunami deposits and tsunami scenarios are investigated along the north coast of Egypt in the framework of the tsunami ASTARTE European and the French-Egyptian IMHOTEP projects. The geology, geomorphology, seismicity, focal mechanisms, calculated stress inversion, and GPS data were used to identify the present day stress regime of the main active zones and the tsunamigenic zones. Trenches and cores were dug in Kefr Saber and EL Alamein sites. X-ray scanning, magnetic susceptibility, grain size analysis, sampling, macrofossil detections, XRD analysis, total organic and inorganic matter measurements and carbon dating are carried out to identify the paleotsunami signatures. The high-energy white sandy layer rich in reworked fossils at Kefr Saber are correlated with 21 July 365, while the four characteristic high-energy sedimentary layers at the El Alamein site are correlated with the historical tsunami events of 1600 BC, 21 July 365, 8 August 1303, and 24 June 1870.
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Asem Salama. Active tectonics and paleotsunami records of the Northern coast of Egypt. Earth Sciences. Université de Strasbourg, 2017. English. ⟨NNT : 2017STRAH012⟩. ⟨tel-01806344⟩

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