Support for a Vraconnian Stage between the Albian sensu stricto and the Cenomanian (Cretaceous System)

Amédro, Francis

doi:10.4267/2042/17063

Cited by 14 publications

(17 citation statements)

References 44 publications

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“…The upper limit of the Aïn El Guettar Formation has been placed in concomitance with a distinctive, tabular, carbonatic bed that crops out extensively north of the Boulouha section known in Tunisian geological studies as the ''Barre Vraconnienne'' of the Rhadouane Member (Bouaziz et al, 1989;Robaszynski et al, 1994;Amédro, 2008;Raulin et al, 2011). The age of this marker bed has been largely debated, because its age is inferred from indirect evidences.…”

Section: Aïn El Guettar and Zebbag Formationsmentioning

confidence: 96%

The “Continental Intercalaire” of southern Tunisia: Stratigraphy, paleontology, and paleoecology

Fanti

Contessi

Franchi

2012

Journal of African Earth Sciences

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Section: Aïn El Guettar and Zebbag Formationsmentioning

confidence: 96%

The “Continental Intercalaire” of southern Tunisia: Stratigraphy, paleontology, and paleoecology

Fanti

Contessi

Franchi

2012

Journal of African Earth Sciences

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“…Based on these faunas we suggest zones and subzones that are correlatable with the standard biozonation (Table 1). (1994), WRIGHT and KENNEDY (1984), HANCOCK (1991), MARCINOWSKI et al (1996), GALE et al (2005), WILMSEN (2007), KENNEDY and LATIL (2007), AMÉDRO (2008), KENNEDY et al (2013), andREBOULET et al (2014). Items marked in bold are recorded in this study.…”

Section: Biostratigraphymentioning

confidence: 99%

“…They are tiny, rounded and, in some cases, barely visible, due to abrasion. Occurrence: Manteliceras saxbii Zone of western Europe (GALE, 1995;GALE et al, 1996;AMÉDRO, 2008) and throughout the lower Cenomanian, but common only in the middle of the substage. It is recorded all over Europe, Russia, North Africa, Angola, Madagascar, Iran and Kazakhstan.…”

Section: Superfamilymentioning

confidence: 99%

Albian and Cenomanian ammonites of the eastern margin of the Lut block (East Iran)

Sharifi¹,

Raisossadat²,

Mehrizi³

et al. 2016

Carnets Geol.

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“…1 for location; pf = planktic foraminifers). Ammonite zonation compiled after data in Kennedy (1984), Wright et al in Wright and Kennedy (1984), Hancock (1991), Marcinowski et al (1996), Cecca (1997), Gale et al (2005Gale et al ( , 2011, Kennedy and Latil (2007), Amédro (2008), and Owen (2012) (J. Sowerby, 1814 Wilmsen et al (2005).…”

Section: Biostratigraphic Conclusionmentioning

confidence: 99%

“…The collected faunas allows the recognition of the following ammonite biozones (Text- fig. 11; biozonation compiled after Kennedy 1984;Wright et al in Wright and Kennedy 1984;Hancock 1991;Cecca 1997;Gale et al 2005Gale et al , 2011Amédro 2008;Latil 2007 andOwen 2012).…”

Section: Biostratigraphic Conclusionmentioning

confidence: 99%

Upper Albian and Cenomanian (Cretaceous) ammonites from the Debarsu Formation (Yazd Block, Central Iran)

Wilmsen

Storm²,

Fürsich

et al. 2013

Acta Geologica Polonica

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Wilmsen, M., Storm, M., Fürsich, F.T. and Majidifard, M.R. 2013. Upper Albian and Cenomanian (Cretaceous) ammonites from the Debarsu Formation (Yazd Block, Central Iran). Acta Geologica Polonica, 63 (4), 489-513. Warszawa. New ammonite faunas consisting of 13 taxa provide the first reliable biostratigraphic dating of the Debarsu Formation of the Yazd Block, west-central Iran, indicating several levels in the Upper Albian and Lower Cenomanian, while a foraminiferal assemblage places the top of the Formation in the Middle Turonian. Among the identified ammonite taxa, Acompsoceras renevieri (Sharpe, 1857) is recorded from Iran for the first time. The upper part of the lower Upper Albian is proved by the occurrences of mortoniceratines of the Mortoniceras (M.) inflatum Zone in the lowermost part of the Debarsu Formation. For the upper Upper Albian (traditional Stoliczkaia dispar Zone), the M. (Subschloenbachia ) rostratum and M. (S.) perinflatum zones are proved by their index taxa. However, there is no evidence of the terminal Arrhaphoceras (Praeschloenbachia) briacensis Zone. The upper part of the lower Lower Cenomanian Mantelliceras mantelli Zone (M. saxbii Subzone) is proved by M. saxbii and M. cf. mantelli. Below, there is an ammonite- barren interval of ca. 100 m in thickness between M. (S.) perinflatum zonal strata and the M. saxbii Subzone. The upper Lower Cenomanian is documented by the presence of typically M. dixoni zonal ammonites such as Acompsoceras renevieri. Upper Cenomanian and Turonian ammonites have not been found in the upper part of the Debarsu Formation, but micro-biostratigraphic evidence (planktonic foraminifers) from the uppermost part of the formation indicate that the formation ranges into the Turonian. For the development of the major tectonic unconformity at the base of the overlying Haftoman Formation (which yielded Lower Coniacian inoceramids near its base), only 2-3 myr remain, stressing the geodynamic activity of Central Iran during mid-Cretaceous times.

show abstract

Support for a Vraconnian Stage between the Albian sensu stricto and the Cenomanian (Cretaceous System)

Cited by 14 publications

References 44 publications

The “Continental Intercalaire” of southern Tunisia: Stratigraphy, paleontology, and paleoecology

The “Continental Intercalaire” of southern Tunisia: Stratigraphy, paleontology, and paleoecology

Albian and Cenomanian ammonites of the eastern margin of the Lut block (East Iran)

Upper Albian and Cenomanian (Cretaceous) ammonites from the Debarsu Formation (Yazd Block, Central Iran)

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