Foraminiferal biostratigraphy and paleoenvironments of the Danian-Selandian succession at the Kharga Oasis, Western Desert, Egypt

  • Abdel Galil A. Hewaidy
  • Sherif Farouk
  • Youssef S. BazeenEmail author
S. I. Geology of Africa
Part of the following topical collections:
  1. New Advances and Research Results on the Geology of Africa


The present work deals with the foraminiferal investigations and analyses of the Danian-Selandian (D-S) succession at Naqb El-Rufuf and Umm El-Ghanayim sections in the Kharga Oasis. Five planktonic foraminiferal zones and subzones (P1c, P2, P3a, P3b, and P4a) were recognized within the studied sections. The D/S stage boundary is characterized by a faunal break at the P3/P4 zonal boundary owing to completely or partially absence of the P3b subzone. This hiatus reveals the dual signature of both the eustatic sea-level changes and the regional tectonic event of the Syrian Arc System. The studied interval is subdivided into three transgressive-regressive sequences bounded by three sequence boundaries at the Cretaceous-Paleogene (K/Pg.) boundary, the boundary between P3a/P3b subzones and the D/S boundary, respectively. The D/S transition is associated with substantial changes in the structure and composition of the foraminiferal assemblages point to extensive paleoenvironmental turnover. The latest Danian sediments were deposited under deep inner-shallow middle neritic environments with oxygen-depleted bottom water conditions and increased trophic level, where an outer neritic environment with meso-oligotrophic and well-oxygenated bottom water conditions prevailed during the deposition of the Selandian deposits.


Danian-Selandian Foraminiferal biostratigraphy Paleoenvironments Latest Danian Event (LDE) Kharga Oasis 



Many thanks extend to the anonymous reviewers for constructive criticisms and valuable comments that greatly improved the manuscript. Prof. Abdullah M. Al-Amri Arabian Journal of Geosciences Editor-in-Chief and the Guest Editor are thanked for the editorial handling and useful comments.


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Copyright information

© Saudi Society for Geosciences 2019

Authors and Affiliations

  1. 1.Geology Department, Faculty of ScienceAl-Azhar UniversityCairoEgypt
  2. 2.Exploration DepartmentEgyptian Petroleum Research InstituteNasr CityEgypt

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