Planktonic foraminiferal biostratigraphy and faunal turnover events during the Late Cretaceous-Early Tertiary along the Red Sea Coast, Egypt

Obaidalla, Nageh A.

doi:10.1016/s0899-5362(00)80008-1

Cited by 18 publications

(6 citation statements)

References 11 publications

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“…The PETM in Egypt has been intensively investigated mainly on the basis of smaller benthic foraminifera (Speijer, 1994;Speijer et al, 1996aSpeijer et al, , 1996bSpeijer et al, , 1997Youssef, 2004;Alegret et al, 2005;Ernst et al, 2006), larger benthic foraminifera (Scheibner et al, 2005), planktic foraminifera (Obaidalla, 2000;, nannoplankton (Aubry et al, 1996;Monechi et al, 2000, Tantawy et al, 2003Youssef, 2004), ostracodes ( Speijer and Morsi, 2002;Elewa and Morsi, 2004), and geochemical and mineralogical parameters Schmitz, 1995, 1998;Schmitz et al, 1996Schmitz et al, , 1997bBolle et al, 2000;Speijer and Wagner, 2002;Dupuis et al, 2003;Knox et al, 2003).…”

Section: Spe424-03 15 Pagesmentioning

confidence: 99%

“…Surprisingly though, the response of planktic foraminiferal assemblages to the climatic perturbation is similar in both settings. Acarinina dominates the planktic assemblages in the open ocean (Kelly et al, 1996b(Kelly et al, , 1998Kelly, 2002) and in deep and shallow Tethyan basins (Arenillas and Molina, 1997;Schmitz et al, 1997a;Lu et al, 1998;Arenillas et al, 1999;Molina et al, 1999;Pardo et al, 1999;Obaidalla, 2000;Ouda, 2003). Various authors (Kelly et al, 1996b(Kelly et al, , 1998Arenillas and Molina, 1997;Kelly, 2002) explain this increase as a response to oligotrophic conditions during the PETM, where photosymbiosis spe424-03 15 pages may facilitate Acarinina to thrive in low-nutrient waters.…”

Section: Response Of Planktic Foraminiferal Assemblages To the Petmmentioning

confidence: 99%

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The Paleocene-Eocene Thermal Maximum in Egypt and Jordan: An overview of the planktic foraminiferal record

Guasti¹,

Speijer²

2007

Large Ecosystem Perturbations: Causes and Consequences

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In the present study, we investigate upper Paleocene to lower Eocene planktic forami niferal assemblages in Egypt and Jordan across a middle neritic to upper bathyal transect of the Tethyan continental margin. In particular, we evaluate the planktic foraminiferal turnover across the Paleocene-Eocene Thermal Maximum (PETM). Dissolution affects the planktic assemblages more intensively than previously considered, especially in the marls below the PETM. High numbers of Subbotina, fl uctuating planktic/benthic (P/B) ratios, and low numbers of planktic foraminifera per gram (PFN) are indicative of dissolution, probably as a consequence of deep weathering. Hence, high numbers of Subbotina in this area do not indicate cooling. Despite this taphonomic overprint, we observe that well-diversifi ed planktic foraminiferal assemblages of Subzone P5a abruptly changed into oligotaxic assemblages dominated by Acarinina during the PETM. Because various biotic and geochemical proxies indicate increased nutrient supply to the basin, we argue that the blooming of Acarinina is not indicative of oligotrophic conditions. Instead, we postulate that (low-trochospiral) Acarinina may have been better adapted to thrive under stressed environmental conditions, possibly because they hosted symbionts different from those in Morozovella.

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Section: Spe424-03 15 Pagesmentioning

confidence: 99%

Section: Response Of Planktic Foraminiferal Assemblages To the Petmmentioning

confidence: 99%

The Paleocene-Eocene Thermal Maximum in Egypt and Jordan: An overview of the planktic foraminiferal record

Guasti¹,

Speijer²

2007

Large Ecosystem Perturbations: Causes and Consequences

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“…Also, all studies in Egypt used this biostratigraphic datum to define the D/S boundary (e.g. Abdel-Kireem and Abdou, 1979;Aref et al, 1988;Bolle et al, 2000;Obaidalla, 2000;El-Dawy, 2001). At Zumaya section (Spain), Schmitz et al (1998) defined this boundary at a level close to the FAD of F. tympaniformis near the calcareous nannofossil NP4/NP5 zonal boundary.…”

Section: The Danian/selandian (D/s) Boundarymentioning

confidence: 99%

“…Despite the numerous studies on the Paleocene, the biostratigraphy of the Egyptian D/S succession has been treated as a part of the Cretaceous/Paleogene publications (e.g. Hume, 1911;Said and Kenawy, 1956;Said, 1962Said, , 1990El-Naggar, 1966;Abdallah et al, 1970;Abdel Kireem, 1976;Abdel-Kireem and Abdou, 1979;Abdel-Kireem and Samir, 1995;Khalifa and El-Sayed, 1984;Luger, 1985;Aref et al, 1988;Kassab, 1990;Kassab and Keheila, 1994;Lüning et al, 1998;Bolle et al, 2000;Obaidalla, 2000;El-Dawy, 2001). Detailed paleoenvironmental as well as high-resolution planktic and benthic foraminiferal biostratigraphical studies on the D/S transition are generally scarce.…”

Section: Introductionmentioning

confidence: 99%

Biostratigraphy and paleoenvironment of the Danian/Selandian (D/S) transition in the Southern Tethys: A case study from north Eastern Desert, Egypt

Obaidalla

El-Dawy

Kassab

2009

Journal of African Earth Sciences

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“…The DQB has a distinctive lithology and its base is theoretically isochronous coinciding with the base of the Eocene in many sections in Egypt. It has been identified from other localities in Egypt: the Nile Valley (Gebel Serai and Taramsa; Tantawy, 2006), the Western Desert (southern Kharga Oasis; Tantawy, 2006), the Gulf of Suez (Galala Mountains; Scheibner and Speijer, 2008), and West Central Sinai (Obaidalla, 2000;Khozyem et al, 2013). In terms of calcareous nannoplankton, the P-E boundary interval has been intensively investigated in Egypt.…”

Section: Introductionmentioning

confidence: 99%

Calcareous nannoplankton changes during the Paleocene-Eocene Thermal Maximum in West Central Sinai, Egypt

Faris¹,

Ghandour²,

Zahran³

et al. 2015

Turkish J Earth Sci

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The Upper Paleocene-Lower Eocene Hanadi and Dababiya Quarry members in West Central Sinai, Egypt, contain nannofossil taxa assigned to the NP9 and NP10 zones. The Hanadi Member displays lateral variation in thickness and is sharply overlain by a dark gray clay layer that defines the base of the Dababiya Quarry Member. The strata immediately overlying this layer contain nannofossil species assigned to the earliest Eocene. The lateral variation in thickness of the Hanadi Member and the abrupt lithological changes between the Hanadi and the Dababiya members probably suggest active syndepositional tectonism and possibly discontinuous sedimentation. The onset of the Eocene brought oceanic anoxic to dysoxic bottom water conditions as revealed by the dark gray and probably organic rich clay and the common occurrence of Chondrites trace fossils. The earliest Eocene calcareous nannofossil NP9b subzone is missing in the area of study and therefore the incoming of the Eocene is placed at the base of the NP10 zone at the first occurrences of Tribrachiatus bramlettei. The dominant nannofossil taxa around this boundary (Rhomboaster intermedia, R. bitrifida, and R. calcitrapa) in addition to Ericsonia subpertusa are interpreted as proxies for warm surface water. The abundance and diversity of Fasciculithus spp. decreased abruptly in the uppermost part of the NP9a subzone and they became fully extinct shortly above the Paleocene/Eocene interval (base of NP10 zone).

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Planktonic foraminiferal biostratigraphy and faunal turnover events during the Late Cretaceous-Early Tertiary along the Red Sea Coast, Egypt

Cited by 18 publications

References 11 publications

The Paleocene-Eocene Thermal Maximum in Egypt and Jordan: An overview of the planktic foraminiferal record

The Paleocene-Eocene Thermal Maximum in Egypt and Jordan: An overview of the planktic foraminiferal record

Biostratigraphy and paleoenvironment of the Danian/Selandian (D/S) transition in the Southern Tethys: A case study from north Eastern Desert, Egypt

Calcareous nannoplankton changes during the Paleocene-Eocene Thermal Maximum in West Central Sinai, Egypt

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