Haytham El Atfy

Mansoura University

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Dieter Uhl

Senckenberg Research Institute and Natural History Museum Frankfurt/M

Salah Y. El Beialy

Mansoura University

Clément Coiffard

Freie Universität Berlin

André Jasper

Univates

Essam M. El Khoriby

Mansoura University

Ralf Littke

RWTH Aachen University

Bandar I. Ghassal

Saudi Aramco (Saudi Arabia)

Martin J. Head

Brock University

Atef M. Hosny

Al-Azhar University

W.Sh. El Diasty

Mansoura University

Cooperative Institutions

Mansoura University

University of Tübingen

Senckenberg Research Institute and Natural History Museum Frankfurt/M

Senckenberg Centre for Human Evolution and Palaeoenvironment

RWTH Aachen University

Al-Azhar University

Instituto de Geociencias

Centre National de la Recherche Scientifique

Alexandria University

Chinese Academy of Sciences

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Source rock potential and depositional environment of Upper Cretaceous sedimentary rocks, Abu Gharadig Basin, Western Desert, Egypt: An integrated palynological, organic and inorganic geochemical study

International Journal of Coal Geology (2017)

Bandar I. Ghassal Ralf Littke Haytham El Atfy Sven Sindern Grzegorz Scholtysik

Palynofacies

10.1016/j.coal.2017.11.018

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Citations (53)

Nukhul Formation, Gulf of Suez, Egypt A fungal proliferation near the probable Oligocene/Miocene boundary,

Haytham El Atfy Rainer Brocke Dieter Uhl

abStract – Moderately to well-preserved palynomorph assemblages were recorded from thirty samples of the Nukhul Formation (GH 404-2A Well), southern Gulf of Suez, Egypt. The taxa are dominated by highly diverse fungi, freshwater algae (e.g. Botryococcus, Pediastrum ) beside a sparse record of spores and pollen. Marine palynomorphs, such as dinoflagellate cysts (dinocysts), are very rare. The stratigraphy and age of the Nukhul Formation is highly debated due to lack of diagnostic fossils (e.g. foraminifera, nan-noplankton). It has been referred mostly to the Early Miocene; however, some recent publications interpret it as being of latest Oligocene–Early Miocene age. A prominent fungal proliferation composed of diverse and moderately well-preserved fungal spores, fungal fragments, fructifications and hyphae is recorded. This fungi-rich interval occurs mainly from 11370 to 11430 ft in the GH 404-2A Well. Such an observation has not been noted previously within the Nukhul Formation or its stratigraphic equivalents in Egypt. This puta-tive ‘eco-event’ is probably associated with the well-known eustatic sea-level fall in the latest Chattian to early Aquitanian or at the Oligocene/Miocene boundary (OMB). It also seems possible that it may represent a more local event related to the rifting of the Gulf of Suez during this period. The high diversity of fossil fungi is interpreted herein as an indication of an episodic prevalence of humid climate at the end of a regres-sive phase, as also indicated by a lithological change near the top of the Shoab Ali Member of the Nukhul Formation. In addition, the co-occurrence of freshwater algae, mainly

Dinoflagellate

Acritarch

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The first evidence of paleo-wildfire from the Campanian (Late Cretaceous) of North Africa

Cretaceous Research (2015)

Haytham El Atfy Hesham Sallam André Jasper Dieter Uhl

Charcoal

10.1016/j.cretres.2015.09.012

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Citations (24)

Dinoflagellate cyst evidence for the age and palaeoenvironments of the Upper Eocene–Oligocene Dabaa Formation, Qattara Depression, north Western Desert, Egypt

Palynology (2018)

Salah Y. El Beialy Martin J. Head Haytham El Atfy Essam M. El Khoriby

The palynological investigation of 30 outcrop samples from seven sites in and near the Qattara Depression, north Western Desert, Egypt, has yielded six samples from three sites containing poorly to well-preserved assemblages including dinoflagellate cysts, freshwater algae, acritarchs, pollen and spores. The sites have not been dated previously, but dinoflagellate cyst evidence reveals an early or middle Rupelian (Early Oligocene) age for one sample (overlapping ranges of Tuberculodinium vancampoae and Phthanoperidinium comatum) and early Rupelian or older (occurrence of Lentinia serrata) for another, establishing time equivalence with the Upper Eocene–Oligocene Dabaa Formation. The palynological assemblages reflect fluctuating conditions on the southern margin of the Tethys/Paratethys Ocean, with the frequent co-occurrence of Homotryblium floripes, Pediastrum and Botryococcus reflecting restricted and probably lagoonal marine environments influenced by seasonal river inflow. Despite low global sea levels during the Early Oligocene, marine conditions evidently extended as far south as the southern Qattara Depression. Outcrops in the north Western Desert are typically deeply weathered and barren of palynomorphs, this being the first report of dinoflagellate cysts from surface sections of the Qattara Depression and its surroundings.

Dinoflagellate

Outcrop

Acritarch

Dinocyst

Palynofacies

10.1080/01916122.2018.1434696

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Citations (13)

REWORKED MESOZOIC RADIOLARIANS IN MIOCENE-PLIOCENE FORELAND SEDIMENTS IN THE ZAGROS BELT, IRAN

RIVISTA ITALIANA DI PALEONTOLOGIA E STRATIGRAFIA (2024)

Christian Dietzel Haytham El Atfy Christoph Berthold Mahmoud Reza Majidifard Madelaine Böhme

Micropaleontology can give important insights into the provenance and paleoenvironmental conditions in terrestrial sedimentary archives. For the current study, 84 samples representing a 2.6 km thick sedimentary profile from the SimplyFolded Zagros Mountain Belt were investigated. They span ca. 10.2 my from the late Middle Miocene (Serravallian) to the earliest Pleistocene (Gelasian), and comprised floodplain sediments and saline mudstones with an aeolian contribution. The mudstones revealed a unique Cretaceous radiolarian assemblage comprising largely of cryptothoracic Nassellarians and spherical spumellarians. This record highlights the reworking of sediments derived from Cretaceous Qulqula- Kermanshah radiolarian claystones and radiolarites in the Imbricated Zagros belt into the distal Neogene Zagros foreland sediments in Lurestan (Lurestan Arc). The high abundance of Holocryptocanium barbui (Dumitrica) and other cryptothoracic taxa compared to the Qulqula- Kermanshah radiolarian claystones and radiolarites potentially indicates a preferred erosion of softer units such as the Red Radiolarian Claystone Unit (RRCU) compared to harder radiolarian cherts. The observation of a reworked largely cryptothoracic assemblage might also point to additional sorting effects during fluvial and aeolian transport as well as during redeposition, depending on the morphology and hydrodynamic properties of individual radiolarian taxa.

10.54103/2039-4942/20461

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Citations (1)

PALYNOLOGY OF THE EOCENE-OLIGOCENE DABAA FORMATION, QATTARA DEPRESSION, NORTH WESTERN DESERT, EGYPT

Salah Y. El Beialy Martin J. Head Haytham El Atfy Essam M. El Khoriby

The palynological investigations of 30 surface samples collected from a series of stratigraphic sections have been constructed for a number of sites in the Qattara Depression, north Western Desert, Egypt. Only 6 samples have yielded a very well preserved and diverse assemblage of palynomorphs including pollen and spores, dinoflagellate cysts, acritarchs and other miscellaneous palynomorphs including fungal palynomorphs and colonial algae . The productive samples are not dated before, but our palynological investigations revealed Late Eocene- Late Oligocene age (Chattian), for the Dabaa Formation. This allows for the first time a major revision and new interpretation of the lithostratigraphy of this area. Our biostratigraphic conclusions are based on the local, regional and global correlations of our recorded assemblages with other published dinocyst and spore-pollen distribution patterns from different Eocene/Oligocene stratigraphic sites all over the world.

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Dinocyst

Lithostratigraphy

Dinoflagellate

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Supplementary material to "The emergence of the tropical rainforest biome in the Cretaceous"

Clément Coiffard Haytham El Atfy Johan Renaudie Robert Bussert Dieter Uhl

Biome

Tropical rain forest

10.5194/egusphere-2022-1246-supplement

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Comment on “Palynological, palaeoenvironmental and sequence stratigraphical analyses of a Turonian-Coniacian sequence, Beni Suef Basin, Eastern Desert, Egypt: Implication of Pediastrum rhythmic signature”. by: Tahoun et al., Marine and Petroleum Geology (2017), 88, 871-887

Marine and Petroleum Geology (2018)

Tarek Anan Maher I. El-Soughier Haytham El Atfy

Sequence (biology)

Sequence Stratigraphy

Paleoecology

Desert (philosophy)

10.1016/j.marpetgeo.2018.02.008

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Citations (2)

Further evidence for Cretaceous wildfires: macro-charcoal from the Malha Formation at Wadi Budra, west-central Sinai, Egypt

South African Journal of Geology (2022)

Haytham El Atfy Mahmoud Kora Rafael Spiekermann André Jasper Dieter Uhl

Abstract Fossil evidence for wildﬁres, in form of fossil charcoal, is known from a large number of Cretaceous localities worldwide and it has repeatedly been argued that wildﬁres were connected to the evolution and radiation of angiosperms during this period. The present study provides new evidence (in form of macro-charcoal) for the occurrence of wildﬁres during deposition of the Lower Cretaceous (pre-Aptian) Malha Formation at Wadi Budra of the Sinai Peninsula, Egypt. Despite growing evidence for the worldwide occurrence of wildﬁres during the Cretaceous, the available database for pre-Aptian wildﬁres is still rather scarce for large regions when seen on a global scale, hampering causal interpretations concerning the interactions between ﬁre ecology and the evolution of ecosystems during these stages.

Aptian

Wadi

Charcoal

10.25131/sajg.125.0011

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Citations (4)

Paleoecologic and stratigraphic significance of the freshwater algae Pediastrum in the Upper Cretaceous (Turonian) marine deposits, north Western Desert, Egypt

PalZ (2017)

Haytham El Atfy Tarek Anan Maher I. El-Soughier

Siliciclastic

10.1007/s12542-017-0338-8

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Citations (17)