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Prof. Refaat Abd Elkareem Osman :: Publications:

Deposition in a changing paleogulf: evidence from the Pliocene–Quaternary sedimentary succession of the Nile Delta, Egypt
Authors: Emad Sallam & Bahay Issawi & Refaat Osman & Dmitry Ruban
Year: 2018
Keywords: Facies association . Lithostratigraphy . Sediment provenance . Late Cenozoic . Nile Delta
Journal: Arabian Journal of Geosciences
Volume: 11:558
Issue: Not Available
Pages: 1-22
Publisher: Springer
Local/International: International
Paper Link:
Full paper Refaat Abd Elkareem Osman_PlioceneGulfArabjGeosc.0.995IF.pdf
Supplementary materials Not Available

Sedimentary complexes of ancient gulfs provide valuable information about paleoenvironmental dynamics. The study of several Pliocene–Pleistocene sections allowed reconstruction of the regional stratigraphical framework in the southwestern fringes of the Nile Delta. The Kafr El-Shiekh, the Gar El-Muluk, and the Kom El-Shelul formations of the Zanclean Age and theWastani Formation of the Piacenzian Age constitute the Pliocene sedimentary succession in the study area. The establishment of 11 facies types related to 5 facies associations coupled with the results of the stratigraphical study indicate the existence of a paleogulf corresponding to the modern delta and lower valley of the Nile. This Nile Paleogulf appeared and reached its maximum spatial extent in the beginning of the Pliocene. Then, it retreated gradually and disappeared before the end of this epoch when alluvial sedimentation reestablished. There was significant flux of siliciclastic material to the study area. The Zanclean Flood in the Mediterranean Sea allowed marine incursion in the study area where the river valley incised during the precedent Messinian Salinity Crisis. Regional tectonic uplift and filling of the accommodation space with siliciclastic material from the eroded land were the main controls on the paleogulf evolution. Strengthened glaciation triggered global sea level fall, and alluvial deposition dominated the study area in the late Pliocene–Pleistocene.

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