Biostratigraphy and stage boundaries of the Upper Cretaceous-Early Paleogene successions in Southern Galala area and South Galala sub-basin development, North Eastern Desert, Egypt.

Journal Article

Youssef, Mahmoud Hefny and Mohamed . 2015

• نوع عمل المنشور: article
• المجلة \ الصحيفة: Historical biology
• رقم العدد: 1
• رقم الإصدار السنوي: 27
• الصفحات: 68–89

مستخلص المنشور

The foraminiferal contents of three surface sections [Gebel Tarboul, Wadi Tarfa (WT) and Bir Dakhl (BD) sections] in
southern Galala area, North-Eastern Desert, Egypt, have been studied in detail and used in biostratigraphy and
chronostratigraphy of the upper Cretaceous–Paleogene successions. Sixty-nine planktonic foraminiferal species belonging
to 23 genera have yielded 17 biozones. They are given in ascending order: Globotruncana aegyptiaca Interval Zone (IZ) ,
Gansserina gansseri IZ, Contusotruncana contusa–Racemiguembelina fructicosa IZ, Abathomphalus mayaroensis IZ, P1c, P2, P3, P3a, P3b, P4, P4a, P4b, P4c, P5, E1, E2, E3, E4 and E5. Moreover, local and widespread regional hiatus was detected in the pelagic to hemipelagic sequence during Cretaceous–Paleogene boundary in southern Galala Sub-basin. This hiatus corresponds to the Early Maastrichtian–Early Eocene in Gebel Tarboul, the interval between Late Maastrichtian–Early Paleocene throughout WT sequences and Late Maastrichtian–Late Paleocene in BD section.