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STRATI 2013 pp 619-622 | Cite as

Integrated Stratigraphy (Bio- and Sequence Stratigraphy) and Facies Analysis of the Upper Cenomanian–Turonian (Lower Upper Cretaceous) in the Eastern Desert, Egypt

  • Markus WilmsenEmail author
  • Emad Nagm
Conference paper
  • 159 Downloads
Part of the Springer Geology book series (SPRINGERGEOL)

Abstract

We have applied facies analysis and an integrated stratigraphic approach to make a detailed study of the Cenomanian–Turonian successions of the Eastern Desert of Egypt. A detailed ammonite biozonation is constructed that allows precise correlations. The predominantly shallow-marine successions include the Galala, Maghra El Hadida, and Umm Omeiyid formations, which represent a shallow-marine, mixed carbonate–siliciclastic open lagoonal to carbonate ramp setting. Six major sedimentary unconformities (Cenomanian sequence boundaries SB Ce 4 and 5, and Turonian sequence boundaries SB Tu 1–4) have been recognized and laterally tracked across the Eastern Desert. Their stratigraphic positions have been calibrated by means of ammonite biostratigraphy and they define five third-order depositional sequences (DS ED 1–5). The sequence-stratigraphic calibration of the study area with successions from other Cretaceous basins demonstrates the contemporaneity of the unconformities across different tectonic plates, strongly suggesting that the formation of these successions resulted from eustatic sea-level changes.

Keywords

Mid-Cretaceous Ammonite biostratigraphy Sedimentary unconformities Correlation Depositional environments 

References

  1. Nagm, E., & Wilmsen, M. (2012). Late Cenomanian-Turonian (Cretaceous) ammonites from Wadi Qena, central Eastern Desert, Egypt: Taxonomy, biostratigraphy and palaeobiogeographic implications. Acta Geologica Polonica,62, 63–89.CrossRefGoogle Scholar
  2. Nagm, E., Wilmsen, M., Aly, M., & Hewaidy, A. (2010a). Cenomanian–Turonian (Cretaceous) ammonoids from the western Wadi Araba area, Eastern Desert, Egypt. Cretaceous Research,31, 473–499.CrossRefGoogle Scholar
  3. Nagm, E., Wilmsen, M., Aly, M., & Hewaidy, A. (2010b). Biostratigraphy of the Upper Cenomanian-Turonian (lower Upper Cretaceous) successions of the western Wadi Araba, Eastern Desert, Egypt. Newsletters on Stratigraphy,44, 17–35.CrossRefGoogle Scholar
  4. Wilmsen, M., & Nagm, E. (2012). Depositional environments and facies development of the Cenomanian-Turonian Galala and Maghra el Hadida formations of the Southern Galala Plateau (Upper Cretaceous, Eastern Desert, Egypt). Facies,58, 229–247.CrossRefGoogle Scholar
  5. Wilmsen, M., & Nagm, E. (in press). Sequence stratigraphy of the lower Upper Cretaceous (Upper Cenomanian–Turonian) of the Eastern Desert, Egypt. Newsletters on Stratigraphy.Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  1. 1.Senckenberg Naturhistorische Sammlungen DresdenMuseum für Mineralogie und Geologie, Sektion PaläozoologieDresdenGermany
  2. 2.Faculty of Science, Geology DepartmentAl-Azhar UniversityAssiutEgypt

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