The Qreiya Section at Gebel Abu Had: Lithostratigraphy, clay mineralogy, geochemistry and biostratigraphy

Knox, R. W. O’B.; Aubry, Marie‐Pierre; Berggren, William A.; Dupuis, Christian; Ouda, Khaled; Magioncalda, Roberto; Soliman, Mamdouh F.

doi:10.2113/49.suppl_1.93

Cited by 31 publications

(20 citation statements)

References 20 publications

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“…Benthic foraminiferal isotopic measurements from various locations in the deep ocean indicate that intermediate/deep ocean δ 13 C values decreased by 2-3 during the PETM (Bralower et al, 1995;Katz et al, 2001;Kennett and Stott, 1991;Thomas and Shackleton, 1996) while values reflecting the atmosphere/surface ocean reservoir show a larger decrease (Figure 1): 3-4.5 for surface-dwelling planktonic foraminifera (Kelly et al, 1996;Kennett and Stott, 1991;Stott, 1992;Stott et al, 1996;Thomas et al, 2002;Zachos et al, 2003), 4-5 for shallow-water planktonic and benthic foraminifera (Cramer et al, 1999; Cramer and Wright, unpublished data given here), 3.5-5 for organic carbon Knox et al, 2003;Steurbaut et al, 2003), and 6-8 for terrestrial paleosol carbonates and mammalian tooth enamel (Bowen et al, 2001;Koch et al, 2003Koch et al, , 1995Koch et al, , 1992. The discrepancy between the magnitude of the shift in these reservoirs indicates that the carbon isotopic gradient between the surface ocean/atmosphere and deep ocean reservoirs decreased by 1-2 during the PETM.…”

Section: Surface Ocean/atmosphere Shiftmentioning

confidence: 96%

Bolide summer: The Paleocene/Eocene thermal maximum as a response to an extraterrestrial trigger

Cramer

Kent

2005

Palaeogeography, Palaeoclimatology, Palaeoecology

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The standard paradigm that the Paleocene/Eocene thermal maximum (PETM) represents a threshold event intrinsic to Earth's climate and connected in some way with long-term warming has influenced interpretations of the geochemical, climate, and biological perturbations that occurred at this event. As recent high-resolution data have demonstrated that the onset of the event was geologically instantaneous, attempts to account for the event solely through endogenous mechanisms have become increasingly strained. The rapid onset of the event indicates that it was triggered by a catastrophic event which we suggest was most likely a bolide impact. We discuss features of the PETM that require explanation and argue that mechanisms that have previously been proposed either cannot explain all of these features or would require some sort of high-energy trigger. A bolide impact could provide such a trigger and, in the event of a comet impact, could contribute directly to the shape of the carbon isotope curve. We introduce a carbon cyle model that would explain the PETM by global warming following a bolide impact, leading to oxidation of terrestrial organic carbon stores built up during the late Paleocene. Our intention is to encourage other researchers to seriously consider an impact trigger for the PETM, especially in the absence of plausible alternative mechanisms.

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Section: Surface Ocean/atmosphere Shiftmentioning

confidence: 96%

Bolide summer: The Paleocene/Eocene thermal maximum as a response to an extraterrestrial trigger

Cramer

Kent

2005

Palaeogeography, Palaeoclimatology, Palaeoecology

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“…The minimum ? 13 C values (4.5‰) of the CIE occur in the upper part of this phase (Knox et al 2003, chapter 5, this volume). The absence of both planktonic and benthic foraminifera in this interval reflects severe CaCO 3 dissolution coupled with strongly reducing (oxygen-deficient) conditions.…”

Section: The Older Highly Reducing Unfossiliferous Dissolution Clamentioning

confidence: 91%

“…The pre-CIE-interval of the Esna Shale corresponds to Unit Esna 1 described at Dababiya (Dupuis et al 2003, chapter 3, this volume; see Knox et al 2003, chapter 5, this volume). It consists predominantly of calcareous shales that are fairly rich in foraminifera and belong to Subzones P4c and P5a.…”

Section: Lithostratigraphymentioning

confidence: 99%

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Upper Paleocene-lower Eocene planktonic foraminiferal biostratigraphy of the Qreiya (Gebel Abu Had) section, Upper Nile Valley (Egypt)

Berggren

Ouda

2003

Micropaleontology

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“…In Egypt, the calcareous nannofossil events at the standard P/E boundary were studied by El-Dawoody (1992, 1994, Faris (1991Faris ( , 1993a, Strougo and Faris (1993), Aubry et al (1999Aubry et al ( , 2000, Faris et al (1999), Dupuis et al (2003) and Knox et al (2003). Faris (1993a) used the LO of T. bramlettei, Discoaster diastypus and D. binodosus to delineate the base of the Eocene in several Egyptian sections.…”

Section: The Paleocene/eocene (P/e) Boundarymentioning

confidence: 99%

Nannofossil biostratigraphy of the Paleocene-lower Eocene succession in the Thamad area, east central Sinai, Egypt

Faris

Shama

2007

Micropaleontology

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In the Thamad area, east central Sinai, two stratigraphic sections are measured and sampled; Gebel El Mishiti and G. El Keeh, in order to determine the nannofossil biostratigrapy of the Paleocene-lower Eocene rocks. Gebel El Mishiti section is considered one of the most complete sections across the K/P boundary in Egypt where all the exposed rocks at G. El Keeh belong to the lower Eocene Egma Formation.A nearly complete sucession of Paleocene nannofossil biozones is recorded from the Esna Formation at G. El Mishiti. They are arranged from base to top as follows: Markalius inversus (NP1), Cruciplacolithus tenuis (NP2), Chiasmolithus danicus (NP3), Ellipsolithus macellus (NP4), Fasciculithus tympaniformis (NP5), Heliolithus kleinpellii (NP6), Discoaster mohleri (NP7/8) and Discoaster multiradiatus (NP9) zones.The Danian/Selandian boundary is located at the base of Zone NP5 at the level of the first appearance of Fasciculithus taxa. The Selandian/Thanetian boundary can be traced tentatively at the base of the Discoaster mohleri Zone (NP7/8). The Paleocene/Eocene boundary is traced between the NP9a/NP9b subzonal boundary which is marked by the first appearances of Discoaster araneus, Rhomboaster calcitrapa, R. bitrifida and R.cuspis. The Paleocene /Eocene boundary lies within the upper part of the Esna Formation.

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The Qreiya Section at Gebel Abu Had: Lithostratigraphy, clay mineralogy, geochemistry and biostratigraphy

Cited by 31 publications

References 20 publications

Bolide summer: The Paleocene/Eocene thermal maximum as a response to an extraterrestrial trigger

Bolide summer: The Paleocene/Eocene thermal maximum as a response to an extraterrestrial trigger

Upper Paleocene-lower Eocene planktonic foraminiferal biostratigraphy of the Qreiya (Gebel Abu Had) section, Upper Nile Valley (Egypt)

Nannofossil biostratigraphy of the Paleocene-lower Eocene succession in the Thamad area, east central Sinai, Egypt

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