Calcareous nannofossil biostratigraphy and paleoecology of the Maastrichtian in the western coast of the Gulf of Suez, Egypt

摘要

Calcareous nannofossil content of the Maastrichtian succession at the western coast of the Gulf of Suez in Egypt has been studied. This study aims to contribute in the understanding of high-resolution biostratigraphy and paleoecologic interpretations. Five biozones (Reinhardtites levis, Arkhangelskiella cymbiformis, Lithraphidites quadratus, Micula murus, and Micula prinsii) were distinguished. According to the paleoecologic parameters (cool-water, warm-water, productivity, preservation, and the ratio of Micula decussata/Watznaueria barnesae), the studied succession is subdivided into five ecozones. The environment of each ecozone is deduced; M. Prinsii, M. murus, and L. quadratus ecozones are characterized by a cooler climate, but R. levis and A. cymbiformis ecozones are characterized by a warmer climate.