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Omar Mohamed, Ahmed Mansour, Sameh S. Tahoun, Ashraf M. T. Elewa and Muhammad Ali Mekkey

Abstract

The current study presents a fully qualitative palynological investigation carried out on the Raha Formation encountered from three wells in the Bakr Oil Field of the Gulf of Suez, Egypt. Around 30 species of pteridophytic spores, 26 species of angiosperm pollen, 24 species of gymnosperm pollen and 27 species of dinoflagellate cysts have been recorded. However, achritarchs, microforaminiferal test linings and freshwater algae are impoverished and sparsely documented throughout the Raha Formation. Two palynozones have been identified based on some stratigraphically significant pollen and spores, arranged from youngest to oldest: (1) Palynozone I (Classopollis brasiliensis–Tricolpites sagax Assemblage Zone) of late Cenomanian age; (2) Palynozone II (Afropollis jardinus–Crybelosporites pannuceus Assemblage Zone) of early-middle Cenomanian age. The distribution and ecological affiliation of specific palynomorph species, as well as various palynofacies parameters, are interpreted. A shallow marine environment from supratidal to distal inner neritic under proximal suboxic–anoxic to dysoxic–anoxic shelf conditions is reconstructed. Palaeobiogeographically, the absence of elaters from the recovered taxa is interpreted in terms of minor floral variation. This may be attributed to climatic and/or an environment-controlled niche establishment, which possibly was shaped by the existence of a physical barrier hindering the distribution of such type of elaterate parent plants.

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Anna V. Mikhailenko, Olesya V. Nazarenko, Dmitry A. Ruban and Pavel P. Zayats

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Aleksandra Dudkowska and Gabriela Gic-Grusza

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Anna Sieczka, Filip Bujakowski and Eugeniusz Koda

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Klaudio Peqini, Bejo Duka, Ramon Egli and Barbara Leichter

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Dominik Pawłowski, Daniel Okupny, Wojciech Włodarski and Tomasz Zieliński

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Daniel Okupny, Seweryn Rzepecki, Ryszard Krzysztof Borówka, Jacek Forysiak, Juliusz Twardy, Anna Fortuniak and Julita Tomkowiak

.M., Krześlak, I. & Świtoniak, M., 2014. The record of hydroclimatic changes in the sediments of kettle-hole in a Young glacial landscape (north-central Poland). Quaternary International 328-329, 264-276. Krygowski, B., 1961. Physical geography of the Great Poland Lowland. P. I. Geomorphology. Poznańskie Towarzystwo Przyjaciół Nauki, Poznań, 1-203. Landner, L. & Reuther, R., 2004. Metals in Society and in the Environment. A Critical Review of Current Knowledge on Fluxes, Speciation, Bioavailability and Risk for Adverse Effects of Cooper

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Leili Saarse

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Christoph Daxer, Jasper Moernaut, Timothy Taylor, Jean Nicolas Haas and Michael Strasser

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Barbara Woronko, Joanna Rychel, Mirosław T. Karasiewicz, Andrzej Ber, Tomasz Krzywicki, Leszek Marks and Katarzyna Pochocka-Szwarc

1, 33-42. Boyle, J.F., 2001. Inorganic geochemical methods in palaeolimnology. [In:] W.M. Last & J.P. Smol (Eds): Tracking environmental change using lake sediments. Physical and Geochemical Methods (Kluwer Academic Publishers, Dordrecht) 2, 83-141. Briant, R.M., Coope, G.R., Preece, R.C., Keen, D.H., Boreham, S., Griffith, H.I., Seddon, M.B. & Gibbard, P.L., 2004. Fluvial system response to Late Devensian (Weichselian) aridity, Baston, Lincolnshire, England. Journal of Quaternary Science 19, 479-495. Brud, S