Planktonic foraminiferal biostratigraphy and paleoenvironment of the Danian/Selandian in west-central Sinai (Egypt), implications from the Nukhul section
| Autor: | Wafa Guesmi, Semeh Bejaoui, Chaima Grira, Moncef Saïd Mtimet, Narjess Karoui-Yaakoub |
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| Rok vydání: | 2016 |
| Předmět: |
010506 paleontology
biology Intertidal zone Biozone Biostratigraphy 010502 geochemistry & geophysics biology.organism_classification 01 natural sciences Foraminifera Paleontology Oceanography Benthic zone Paleoclimatology General Earth and Planetary Sciences Sea level Geology 0105 earth and related environmental sciences General Environmental Science Isotope analysis |
| Zdroj: | Arabian Journal of Geosciences. 9 |
| ISSN: | 1866-7538 1866-7511 |
| DOI: | 10.1007/s12517-016-2513-8 |
| Popis: | The foraminiferal analysis at the Danian/Selandian boundary of the Nukhul section (Egypt) enabled us to determine the biozones of Praemurica uncinata (P2); Morozovella angulata (P3a); Igorina albeari (P3b), and Acarinina soldadoensis/Globanomalina pseudomenardii (P4c). Thus, the base of Selandian is defined by the first occurrence of I. albeari and the P4c subzone covers unconformably the P3b subzone. The quantitative and qualitative analysis of the planktonic and benthic foraminifera assemblages and the isotopic analysis permitted characterization of the paleoclimate and paleoenvironment. Thus, at the middle to upper Danian, the environment was marine intertidal under a relatively cold climate. At the lower Selandian base of the Thanetian, a rise in the sea level was recorded and the warmer climatic conditions seem to be settling. In the upper Thanetian, we note the installation of colder weather conditions and a further sudden drop in sea level. |
| Databáze: | OpenAIRE |
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