High-resolution stratigraphy of the Cenomanian–Turonian boundary interval at Pueblo (USA) and wadi Bahloul (Tunisia): stable isotope and bio-events correlation

Caron, M.; Dall’Agnolo, Stephan; Accarie, H.; Barrera, Enriqueta; Kauffman, Erle G.; Amédro, Francis; Robaszynski, Francis

doi:10.1016/j.geobios.2004.11.004

Cited by 189 publications

(144 citation statements)

References 35 publications

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“…The species W. praehelvetica was found several times in the Turonian part of the section but already in the uppermost part of the Cenomanian. This observation confirms those made in the Upper Cenomanian of two distant sections: wadi Bahloul in central Tunisia and Pueblo in the United States of America (Caron et al, 2006). The FO of the species is a good bio-event but it probably lies below the base of the Bou Ghanem section as presented here.…”

Section: Planktic Foraminiferasupporting

confidence: 91%

“…Thin sections show very abundant planktic foraminifera belonging to the Heterohelix genus in a packstone and rare saccocomids in carbonate-rich cement with black organic matter. The sudden development of Heterohelix ('Heterohelix shift' of Caron et al, 2006) is bio-event 2 which marks the first organic-carbon rich laminae at the basal part of the Bahloul s.s. in central Tunisia.…”

Section: Methodsmentioning

confidence: 99%

“…One of them is of regional value (the Heterohelix bioevent 2), the others being of a more global value as shown also by Caron et al (2006): LO of R. cushmani (bio-event 1), LO of Th. multiloculata (bio-event 5), ''filaments'' accumulation (bio-event 6) and entry of H. helvetica (bio-event 9).…”

Section: Commentsmentioning

confidence: 99%

“…The Total Organic Carbon content as the hydrogen and oxygen indexes (Rock-Eval) of 22 sites were previously given by Layeb and Belayouni (1992). Descriptions and characteristics of the type Bahloul Formation have been published by Robaszynski in Burollet and Robaszynski (1992), Maamouri et al (1994), Ben Haj Ali et al (1994, Caron et al (1999Caron et al ( , 2006 and Amé dro et al (2005). In the Kalaat Senan area, we studied three sites for their lithology, microfacies, macro-and microfossil content and geochemistry (d 13 C): SM section in the wadi Smara (Robaszynski et al, 1990(Robaszynski et al, , 1993(Robaszynski et al, , 1994Robaszynski, 2005), ZR section at the Koudiat el Azreg and TJ section in the Tajerouine area (Accarie et al, 1996(Accarie et al, , 2000Amé dro et al, 2005), cf.…”

Section: Introductionmentioning

confidence: 99%

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The global bio-events at the Cenomanian-Turonian transition in the reduced Bahloul Formation of Bou Ghanem (central Tunisia)

Robaszynski¹,

Zagrarni²,

Caron

et al. 2010

Cretaceous Research

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In central Tunisia, the thickness of the Bahloul Formation varies generally between 20 to 40 m such as for example, respectively, at wadi Smara near Kalaat Senan and at wadi Bahloul near Maktar. The thickness is also of several tens metres at Koudiat el Azreg near Jerissa and at Tajerouine. In these sites where the thickness of the Bahloul Formation is dilated, in addition to five geochemical events (d 13 C), nine bioevents were defined near the Cenomanian-Turonian transition, successively in ascending order: 1. LO Rotalipora cushmani, 2. Heterohelix bio-event, 3. FO Pseudaspidoceras pseudonodosoides, 4. LO P. pseudonodosoides, 5. LO Thalmanninella multiloculata, 6. ''filaments'' bio-event, Cenomanian-Turonian transition, 7. FO Watinoceras sp., 8. FO Pseudaspidoceras flexuosum, 9. FO Helvetoglobotruncana helvetica. Even though the Bahloul Formation in the Bou Ghanem site is only 7.7 m thick (from which only 2.4 m of laminated black limestones), all nine marker bio-events were recorded, almost in the same order except some small differences. A good number of these bio-events are global as they are also present at Pueblo (Colorado, USA), the stratotype for the base of the Turonian stage. Consequently, at a global scale, it is possible to place the Cenomanian-Turonian boundary with one or several of these bio-events, with a good level of confidence.

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Section: Planktic Foraminiferasupporting

confidence: 91%

Section: Methodsmentioning

confidence: 99%

Section: Commentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The global bio-events at the Cenomanian-Turonian transition in the reduced Bahloul Formation of Bou Ghanem (central Tunisia)

Robaszynski¹,

Zagrarni²,

Caron

et al. 2010

Cretaceous Research

Self Cite

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“…subconciliatus zone), seemingly related with the Ocean Anoxic Event of the Cenomanian-Turonian Transition (OAE2) of Schlanger and Jenkyns (1976) . Similar isotopic variations were observed by other authors, such as Kennedy et al (2000) and Caron et al (2006) in correlative levels of other regions and, thus, they were possibly produced by worldwide oceanographic and climatic changes.…”

Section: Assemblagesupporting

confidence: 89%

Asociación de cefalópodos y secuencias deposicionales en el Cenomaniense superior y Turoniense inferior de la Península Ibérica (España y Portugal)

Barroso-Barcenilla

Callapez²,

Soares³

et al. 2011

J. iber. geol.

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Unraveling the onset of Cretaceous Oceanic Anoxic Event 2 in an extended sediment archive from the Tarfaya‐Laayoune Basin, Morocco

et al. 2017

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We investigated the onset and development of Cretaceous Oceanic Anoxic Event 2 (OAE2) in a newly drilled core (SN°4) from the Tarfaya Basin (southern Morocco), where this interval is unusually expanded. High‐resolution (centimeter‐scale equivalent to centennial) analysis of bulk organic and carbonate stable isotopes and of carbonate and organic carbon content in combination with XRF scanner derived elemental distribution reveal that the ocean‐climate system behaved in a highly dynamic manner prior to and during the onset of OAE2. Correlation with the latest orbital solution indicates that the main carbon isotope shift occurred during an extended minimum in orbital eccentricity (~400 kyr cycle). Shorter‐term fluctuations in carbonate and organic carbon accumulation and in sea level related terrigenous discharge were predominantly driven by variations in orbital obliquity. Negative excursions in organic and carbonate δ13C preceded the global positive δ13C shift marking the onset of OAE2, suggesting injection of isotopically depleted carbon into the atmosphere. The main δ13C increase during the early phase of OAE2 in the late Cenomanian was punctuated by a transient plateau. Maximum organic carbon accumulation occurred during the later part of the main δ13C increase and was associated with climate cooling events, expressed as three consecutive maxima in bulk carbonate δ18O. The extinctions of the thermocline dwelling keeled planktonic foraminifers Rotalipora greenhornensis and Rotalipora cushmani occurred during the first and last of these cooling events and were likely associated with obliquity paced, ocean‐wide expansions, and intensifications of the oxygen minimum zone, affecting their habitat space on a global scale.

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High-resolution stratigraphy of the Cenomanian–Turonian boundary interval at Pueblo (USA) and wadi Bahloul (Tunisia): stable isotope and bio-events correlation

Cited by 189 publications

References 35 publications

The global bio-events at the Cenomanian-Turonian transition in the reduced Bahloul Formation of Bou Ghanem (central Tunisia)

The global bio-events at the Cenomanian-Turonian transition in the reduced Bahloul Formation of Bou Ghanem (central Tunisia)

Asociación de cefalópodos y secuencias deposicionales en el Cenomaniense superior y Turoniense inferior de la Península Ibérica (España y Portugal)

Unraveling the onset of Cretaceous Oceanic Anoxic Event 2 in an extended sediment archive from the Tarfaya‐Laayoune Basin, Morocco

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