Calcareous nannofossils of the Paleocene–Eocene transition in four sections from Egypt

Faris, Mahmoud; Farouk, Sherif

doi:10.3906/yer-1411-25

Cited by 13 publications

(9 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Discoaster binodosus appears in the uppermost part of Zone NP9 (Perch-Nielsen, 1985). However, it was recorded near the base of Subzone NP9b (Faris and Salem, 2007) and within Zone NP10 (Faris and Farouk, 2015). In the study section, D. binodosus was recorded shortly above the base of Zone NP10 (Table).…”

Section: The Lo Of Discoaster Binodosusmentioning

confidence: 65%

“…Later, the base of the Eocene was placed at the GSSP in coincidence with the base of calcareous nannofossil Subzone NP9b (Dupuis et al, 2003). At several Egyptian sections, the P/E boundary was delineated at the base of Subzone NP9b (e.g., Tantawy, 2006;Faris and Salem, 2007;Faris and Farouk, 2015). In this study, the P/E boundary is placed at the base of Subzone NP9b that is delineated by the LOs of Rhomboaster spp., Discoaster anartios, and/or D. araneus (Table).…”

Section: Remarksmentioning

confidence: 88%

“…Furthermore, the HO of F. alanii is close to the CIE (Dupuis et al, 2003). It was recorded in coincidence with the top of Subzone NP9a 2013a;Al Wosabi, 2015;Faris and Farouk, 2015). Therefore, it can be used to distinguish the pre-CIE part of Zone NP9 from the post-CIE part (Aubry and Salem, 2013a).…”

Section: The Lo and Ho Of The Fasciculithus Alanii Groupmentioning

confidence: 99%

“…The LOs of RD were utilized to subdivide Zone NP9 into two subzones (Aubry and Sanfilippo, 1999;Dupuis et al, 2003;Agnini et al, 2007aAgnini et al, , 2007bFaris and Farouk, 2015). However, the Eocene sequence at the GSSP starts at the base with an interval marked by carbonate dissolution (Dupuis et al, 2003) that prevents precise determination of the changes of nannofossil taxa across the P/E boundary (Raffi et al, 2005).…”

Section: The Los and Hos Of The Calcareous Nannofossil Excursion Taxamentioning

confidence: 99%

See 3 more Smart Citations

Upper Paleocene-lower Eocene calcareous nannofossil stratigraphy at the Misheiti Section, Central Sinai, Egypt

Kasem¹,

Wise²,

Faris³

et al. 2020

Turkish J Earth Sci

Self Cite

View full text Add to dashboard Cite

Dababiya Quarry Beds (DQBs; Dupuis et al., 2003) that were documented in several sections in Egypt (Tantawy, 2006; Khozyem et al., 2013). 2. Studied section and methods Twenty-two bulk rock samples were investigated from the upper Paleocene-lower Eocene at the Misheiti Section, Central Sinai, Egypt (Figure 1). Smear slides were prepared according to Bown and Young (1998) and investigated using a Zeiss Axio-Photo microscope at Florida State University, USA. We counted 300-400 calcareous nannofossil specimens on the slide to recognize the relative abundances of species (Jiang and Gartner, 1986). The calcareous nannofossil diversity represents the total number of species recorded in the sample. Thoracosphaera fragments greater than 4 µm were counted as a whole specimen (Gardin and Monechi, 1998). The state of preservation of the assemblage was described as good (G) for little or no evidence of etching and/or overgrowth, and moderate (M) when specimens exhibited some overgrowth and/or dissolution but the species was still recognizable (Kasem et al., 2017a). The calcium carbonate

show abstract

Section: The Lo Of Discoaster Binodosusmentioning

confidence: 65%

Section: Remarksmentioning

confidence: 88%

Section: The Lo and Ho Of The Fasciculithus Alanii Groupmentioning

confidence: 99%

Section: The Los and Hos Of The Calcareous Nannofossil Excursion Taxamentioning

confidence: 99%

See 2 more Smart Citations

Upper Paleocene-lower Eocene calcareous nannofossil stratigraphy at the Misheiti Section, Central Sinai, Egypt

Kasem¹,

Wise²,

Faris³

et al. 2020

Turkish J Earth Sci

Self Cite

View full text Add to dashboard Cite

show abstract

“…The HO of this species has also been reported in several areas in Egypt such as Gabal Aweina, Gabal Duwi, Gabal Abu Had (AUBRY, 1998;VON SALIS et al, 1998;AUBRY & SALEM, 2013) and at Wadi Nukhul in West Central Sinai (KHOZYEM et al, 2013). The HO of F. alanii at the Markha section (WC Sinai), can be used to ap proximate the P/E boundary (FARIS & FAROUK, 2015). In the present study, the HO of Fasciculithus alanii was recorded at the base of the NP9b Subzone (sample 27) at the Gabal Umm El Gha nayim section.…”

Section: Calcareous Nannofossil Bioeventsmentioning

confidence: 77%

Calcareous nannofossil bioevents at the Paleocene/Eocene boundary in Kharga Oasis, Western Desert of Egypt

Faris

Shabaan²,

Shaker³

2017

Geol Cro

Self Cite

View full text Add to dashboard Cite

Two upper Palaeocene-lower Eocene stratigraphic sequences at the Kharga Oasis (Umm El Ghanayim and Naqb Assiut sections) were studied biostratigraphically on the basis of their calcareous nannofossil content. The investigated interval includes the upper part of the Tarawan Formation, the Tarawan Chalk, and the Esna formations. A total number of sixty-seven different taxa have been identified. The lowest occurrence (LO) of Discoaster araneus was used to place the base of the NP9b Subzone (base of Eocene) at the Gabal Umm El Ghanayim section. The lowest occurrences (LOs) of Rhomboaster bitrifida, Discoaster araneus and D. anartios are used to define the NP9a/NP9b subzonal boundary at the Gabal Naqb Assiut section. In this section, the P/E boundary is marked by a minor lithologic hiatus as indicated by the absence of the basal part of the Dababiya Member. At the studied two sections, a major turnover in calcareous nannofossil assemblages across the P/E transition was documented. The abundance of warm water Ericsonia subpertusa, Fasculithus spp., Coccolithus eopelagicus, Discoaster spp., Rhomboaster bitrifida and Tribrachiatus bramlettei characterize the Palaeocene-Eocene transition and suggest global warming and the Palaeocene-Eocene Thermal Maximum (PETM). 2.2. Esna Formation The term Esna Shale was first introduced by BEADNELL (1905), to describe the shale succession that overlies the Tarawan Forma tion and underlies the Thebes Formation at Gabal Oweina, Esna Idfu area, Upper Nile Valley. ABDELRAZIK (1972) separated this formation into two members, the El Hanadi Member at the base and the El Shaghab Member at the top. DUPUIS et al. (2003) classified the Esna Formation from the base to the top, into three units (Esna Unit 1, Esna Unit 2 and Esna Unit 3) (Table 1).

show abstract

A multi‐proxy based high‐resolution stratigraphical analysis of the possible Palaeocene–Eocene boundary interval, Salt Range, Pakistan

et al. 2020

View full text Add to dashboard Cite

The Palaeocene–Eocene boundary (PEB) interval has been recognized in the Patala Formation, Nammal Gorge Section, Pakistan using lithostratigraphy, stable carbon isotope stratigraphy and integrated biostratigraphy. Four distinct lithological units are identified in the Patala Formation in stratigraphic order from bottom to top; unit‐1 to unit‐4. The top of unit‐3 hosts three closely spaced unconformities demarcated as U1, U2, and U3. The PEB interval is represented by a negative shift of 1.61‰ in δ13CV‐PDB representing the carbon isotopic excursion (CIE) in unit‐2. Based on the encountered foraminifera, dinocysts, and calcareous nannoplanktons, the following biozones are identified across the PEB; two larger benthonic foraminiferal (LBF) zones (SBZ4 and SBZ5), the zonal boundary slightly postdating the CIE, two smaller benthonic foraminiferal zones (BB1 and BB2), three planktonic foraminiferal zones (P4/P5 + E1), four dinocysts zones (Pak‐DV, Pak‐DVI, Pak‐DVII, Pak‐DVIII), and two calcareous nannoplankton subzones (NP9a and NP9b). The following protist, dinocyst and calcareous nannoplanktons encountered in the studied interval advocates for the placement of the possible PEB at the level between samples NAM‐SH‐07 and 08; 1—presence of the smaller benthonic foraminifera Angulogavelinella avnimelechi diagnostic of the base of the CIE and the benthonic extinction event (BEE) Tethys wide, 2—presence of the cosmopolitan and the PEB diagnostic dinocyst species ‘Axiodinium augustum’, 3—presence of the PEB diagnostic Rhomboaster‐Discoaster calcareous nannoplankton assemblage. The LBF species Alveolina vredenburgi [a marker species of the Larger Foraminiferal Turnover (LFT) associated with the Palaeocene Eocene Thermal Maximum (PETM) and PEB in western Tethys] occurs slightly above the onset of the CIE. Previously reported compositional change in the LBF assemblage from the Salt Range [i.e. the replacement of the Palaeocene orbitoidiform LBF (Setia and Orbitosiphon) by the Eocene LBF (Orthophragminids, Alveolina, Nummulites and Assilina)] also postdates the PEB interval here. The late appearance of Alveolina vredenburgi and the compositional change in the LBF after the onset of the CIE are attributed to the facies variation across the PEB reflecting fluctuating depositional environment due to the active tectonic across this interval. This fluctuation is evident from the smaller benthonic and planktonic foraminiferal dominating assemblages in unit‐2 representing bathyal settings followed by LBF dominating unit‐3 representing shallow carbonate platform settings. The change in LBF assemblage closely resembles the well‐known LFT associated with the PETM as well as the carbonate platform stage III and the PEB reported from other Tethyan sections.

show abstract

Calcareous nannofossils of the Paleocene–Eocene transition in four sections from Egypt

Cited by 13 publications

References 26 publications

Upper Paleocene-lower Eocene calcareous nannofossil stratigraphy at the Misheiti Section, Central Sinai, Egypt

Upper Paleocene-lower Eocene calcareous nannofossil stratigraphy at the Misheiti Section, Central Sinai, Egypt

Calcareous nannofossil bioevents at the Paleocene/Eocene boundary in Kharga Oasis, Western Desert of Egypt

A multi‐proxy based high‐resolution stratigraphical analysis of the possible Palaeocene–Eocene boundary interval, Salt Range, Pakistan

Contact Info

Product

Resources

About