Sequence stratigraphy of the Cenomanian Galala Formation, north Eastern Desert, Egypt

Khalifa, M.A.; Ghar, Mohamed S. Abu El; Helal, Sobhi; Hussein, Ahmed W.

doi:10.1016/j.jafrearsci.2013.09.005

Cited by 17 publications

(4 citation statements)

References 20 publications

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“…This surface reveals pervasive bioturbation evidenced in the Kuh-e-Fahliyan section and is considered as the FS of Apt6 (e.g. van , Khalifa et al 2013. The weathered marl and shale of the Kazhdumi Formation overlies this boundary conformably.…”

Section: Sequence Stratigraphymentioning

confidence: 90%

Sequence stratigraphy and platform to basin margin facies transition of the Lower Cretaceous Dariyan Formation (northeastern Arabian Plate, Zagros fold-thrust belt, Iran)

Moosavizadeh¹,

Mahboubi²,

Moussavi‐Harami³

et al. 2015

Bull. Geosci.

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The Lower Cretaceous (Aptian-Albian) Dariyan Formation (northeastern Arabian Plate, Iran) represents the youngest sediments of the Khami group in the Zagros fold belt. This study is based on six sections located in the Izeh Zone and Interior Fars Province documenting transition from platform to a basin margin facies. Three assemblage zones based on benthic foraminifers have been identified and provide an early Aptian-early Albian age. Petrographic and microfacies analyses characterize thirteen carbonate microfacies and two mud rock lithofacies-types. The vertical and lateral facies variations observed in this study for the Dariyan Formation are in agreement with a depositional environment going from a homoclinal carbonate ramp to margin of intra-shelf basin type. Based on the identification of three sequence boundaries (SB), the Dariyan Formation sediments has been divided into three 2 nd -order depositional sequences which encompasses six and five 3 rd -order sequences in the margin of intra-shelf basin and the shallow platform settings, respectively. The early Aptian sea-level rise led to the extension of the carbonate platform and deposition of pelagic facies as a maximum flooding surface on margin of intra-shelf basin. In the late Aptian highstand phase, the platform was exposed as a result of glacio-eustatic mechanisms, whereas sediments continued to accumulate in the margin of intra-shelf basin. This study supports the general paleogeography of the studied area documented by previous studies and provides better insight to the interpretation of the evolution in this area and other similar basins.•

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Section: Sequence Stratigraphymentioning

confidence: 90%

Sequence stratigraphy and platform to basin margin facies transition of the Lower Cretaceous Dariyan Formation (northeastern Arabian Plate, Zagros fold-thrust belt, Iran)

Moosavizadeh¹,

Mahboubi²,

Moussavi‐Harami³

et al. 2015

Bull. Geosci.

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“…1a), where a major marine transgression inundated extensive parts of northern Egypt to a palaeolatitude of 23° N in the late Cenomanian. Consequently, shallow marine conditions were developed, and the lower Upper Cretaceous marine deposits formed extensive exposures (Philip and Floquet 2000;Nagm et al 2010a, b;Nagm 2012, 2013;Khalifa et al 2014).…”

Section: Geological Settingmentioning

confidence: 99%

Changes in macrofaunal groups before, during and after the Cenomanian–Turonian biotic crisis in north Eastern Desert, Egypt

Abd-Elhameed

Salama

Mahmoud

2023

Palaeobio Palaeoenv

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The stratigraphic distribution of the different faunal groups of the upper Cenomanian–lower Turonian deposits in the north Eastern Desert, Egypt, is investigated. Variations in species richness, faunal diversity, extinction and origination rates before, during, and after the globally known Oceanic Anoxic Event (OAE) 2 are documented. The OAE2 interval is constrained by the first occurrence of the marker ammonite species Vascoceras cauvini and the last occurrence of Vascoceras proprium, along with the positive δ13C excursions, previously identified from the Wadi El-Burga section. A prominent decline in species richness and diversity, high extinction rates, and low origination rates of the recorded macrofaunal elements are reported during the OAE2 interval. Such faunal bottleneck was attributed to the prevailing major palaeoclimatic and palaeoenvironmental perturbations during that time. Besides oceanic anoxia, changes in sea water palaeotemperature and sea level are discussed. It can be concluded that oceanic anoxia, warming, and /or transgressive episodes were the major driving mechanisms of the faunal crisis reported in the present work.

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“…At the northern deeper Egyptian part, including the northern Sinai and the northern part of the Western Desert, carbonate sediments prevailed. To the south, at the central part of Sinai and the Eastern Desert, carbonates and clastic sediments were deposited, whereas clastic sediments dominate with high terrigenous influx at the southern part of Sinai and the Eastern Desert (Gertsch, Keller, & Adatte, 2010;Issawi, El Hinnawi, Francis, & Mazhar, 1999;Kerdany & Cherif, 1990;Khalifa, Abu El Ghar, Helal, & Hussein, 2018;Khalifa, Abu El Ghar, Helal, & Wagih, 2014). Along the western and eastern margins of the Gulf of Suez rift, the Cenomanian-Turonian sediments have a wide geographic distribution and form distinct rock units lying directly on the pre-Cenomanian Nubian Sandstone or Malha Formation (Issawi et al, 1999;Kerdany & Cherif, 1990).…”

Section: Geological Setting and Lithostratigraphymentioning

confidence: 99%

Early–Middle Cenomanian foraminifera and ostracods from BB‐80‐1 well, Gulf of Suez, Egypt: Biostratigraphy, palaeoecology, and palaeobiogeographic significance

Shahin

Baz

2021

Geological Journal

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The present study concentrates on the foraminiferal and ostracod assemblages recorded from the subsurface Galala Formation in the northern part of the Gulf of Suez, Egypt. This investigation yielded 37 foraminiferal species (belonging to 26 genera, 10 superfamilies, and 14 families) and 25 ostracod species (belonging to 14 genera, 6 families, and 2 superfamilies). The foraminiferal assemblage is characterized by the dominance of typical Cenomanian agglutinated species with some planktonic species. The integration between benthic and planktonic foraminiferal species has led to the recognition of five proposed local biozones namely: Flabellammina alexanderi-Daxia cenomana Zone, Thomasinella fragmentaria Zone, Ismailia neumannae Zone, Nezzazata simplex-Trochospira avnemelichi Zone, and Hedbergella delrioensis-Praeglobotruncana delrioensis Zone. On the other hand, the stratigraphic distribution of the recorded ostracods resulted in the identification of four local biozones, involving Glenocythere reticulata Zone, Veeniacythereis streblolophata Zone, Spinoleberis yotvataensis Zone, and Cytherella-Ovocytheridea Zone. The recorded foraminifera are classified into five morphogroups and submorphogroups. Based on these morphogroups and other palaeoecological factors, five ecozones covering the Cenomanian are also distinguished. The palaeobiogeographical outline of the studied ostracod assemblages was carried out with the assistance of multivariate analyses (principal component analysis and Q-mode cluster analysis). The results point out that, there are two distinguished groups; one of them represents the South Tethyan Province (STP), including Morocco, Algeria, Tunisia, and Egypt. The second group represents the Middle East Province (MEP), including Oman, Lebanon, Saudi Arabia, Kuwait, and Iran. The strong affinity between the two provinces indicates a direct communication along the Southern Tethyan margin during the Cenomanian and enhanced marine faunal exchange.

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Sequence stratigraphy of the Cenomanian Galala Formation, north Eastern Desert, Egypt

Cited by 17 publications

References 20 publications

Sequence stratigraphy and platform to basin margin facies transition of the Lower Cretaceous Dariyan Formation (northeastern Arabian Plate, Zagros fold-thrust belt, Iran)

Sequence stratigraphy and platform to basin margin facies transition of the Lower Cretaceous Dariyan Formation (northeastern Arabian Plate, Zagros fold-thrust belt, Iran)

Changes in macrofaunal groups before, during and after the Cenomanian–Turonian biotic crisis in north Eastern Desert, Egypt

Early–Middle Cenomanian foraminifera and ostracods from BB‐80‐1 well, Gulf of Suez, Egypt: Biostratigraphy, palaeoecology, and palaeobiogeographic significance

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