Micro and nannopaleontology of the Upper Cretaceous-Paleocene succession in West Mawhoob area, Dakhla Oasis, Egypt

• A.S. El Dawoody ^{[1] [3]} ; M.A. Zidan ^[2]
  1. [1] Cairo University

     Cairo University

     Egipto

     
  2. [2] Science Museum, Cairo, Egypt
  3. [3] Faculty of Education, Doha/Qatar

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• Localización: Revista española de micropaleontología, ISSN 0556-655X, Vol. 8, Nº. 3, 1976, págs. 401-428
• Idioma: inglés
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• Resumen

  • This paper deals with the biostratigraphic results achieved from a detailed micro- and nannopaleontologic study for the Upper Cretaceous sediments of West Mawhoob area, Dakhla Oasis, Egypt. Thirty two species of nannofossils belonging to 17 genera were identified and described. They lead to the recognition of the Arkhangelskiella cymbiformis zone characteristic to the Maestrichtian part of the section. The stratigraphic ranges of both planktonic foraminifera and calcareous nannoplankton encountered in the investigated section delineate the following zones, arranged from top to base as:

    Upper Paleocene:

    6. Globorotalia velascoensis zone |.

    5. Globorotalia angulata zone ------| A zone devoid of nannofossils .

    L.-M. Paleocene: ----------------------|.

    4. Globorotalia uncinata zone ------|.

    Maestrichtian:

    3. A zone without diagnostic ------|.

    Foraminifera --------------------------| Arkhangelskiella cymbiformis zone.

    2. Globotruncana gansseri zone |.

    1. Globotruncana fornicata zone |.

    These biostratigraphic zones were correlatable with corresponding successions in Egypt as well as with those in other parts of the world.