Thesis (Ph.D.) - Cairo University - Faculty of Science - Department of Geology

The Upper Cretaceous-Lower Tertiary sedimentary sequences in the Central Eastern Desert of Egypt were studied in three shallow boreholes (Wassief, Um El-Huaitat, and Mohamed Rabah). This study focuses on an integrated investigation of biostratigraphy, lithostratigraphy, petrography and geochemical (inorganic and organic) parameters, to provide important clues to interpret the prevailed depositional conditions. Biostratigraphically, eight planktonic foraminiferal zones, ranging in age from Late Cretaceous to Early Eocene were documented; Globotruncana aegyptiaca, Parasubbotina pseudobulloides, Praemurica trinidadensis, Praemurica uncinata, Morozovella angulata, Globanomalina pseudomenardii, Morozovella velascoensis, and Morozovella subbotinae zones. Three hiatus surfaces were recognized as evidenced by missing some formaniniferal zones. Petrographically, thirteen Microfacies Types (MFT) were recognized; MFT-1, silty to sandy mudstone; MFT-2, organic-rich silty mudstone; MFT-3, fine-grained sandstone/glauconite intercalations; MFT-4, phosclast packstone to phosclast grainstone; MFT-5, phosooid packstone to phosooid grainstone; MFT-6, non-fossiliferous lime-mudstone; MFT-7, phosphatic foraminiferal pack/grainstone; MFT-8, bioclastic foraminiferal packstone, MFT-9, bioclastic foraminiferal wackestone; MFT-10, glauconitic phosphatic foraminiferal wack-packstone; MFT-11, non-fossiliferous dolomitic mudstone; MFT-12, dolomitic glauconitic lime-mudstone, and MFT-13 dolomitic bioclastic wackestone

Issued also as CD