8th International Nannoplankton Association Conference


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Akmal M. Marzouk, Christian Scheibner:
Calcareous nannofossil biostratigraphy of the Late Cretaceous-Early Tertiary northern and southern Galala Plateau, Eastern Desert, Egypt

A detailed nannobiostratigraphic investigation has been carried out on eight Upper Cretaceous-Palaeogene sections in the northern and southern Galala, on the western side of the Gulf of Suez. In most sections, the nannofossils are generally abundant and well-preserved. The recorded nannofossil events are calibrated with equivalent planktonic foraminifera zones, already recognised in the same samples. A high-resolution biostratigraphic zonation is presented and correlated with corresponding biozones in Egypt, as well as in the neighbouring tethyan region. A hiatus across the Maastrichtian-Paleocene boundary is evident, or inferred, in most sections. An exception is the St. Paul section, with the presence of the uppermost Maastrichtian nannoplankton Micula prinsii Biozone and the earliest Paleocene NP1 Biozone. The St. Paul section is considered as the most complete across the Cretaceous/Paleocene boundary in Egypt. No nannofloral break was observed across the Paleocene/Eocene boundary.

A fourfold subdivision of NP10 could be established in some sections, while in other sections only two subzones (NP10a-c and NP10d) could be separated because of the absence of T. digitalis. The bio- and lithostratigraphic correlation of the sedimentary sections on the western side of the Gulf of Suez show facies changes, thickness differences and lateral interfingering of various Late Cretaceous-Early Tertiary formations. The palaeoenvironmental settings of the sections suggested by the assemblages and the facies are discussed.


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 [Division of Micropalaeontology] [Department of Geosciences] [Bremen University]

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