A. Poignant’s research while affiliated with Sorbonne University and other places

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Publications (5)

An attempt of biozonation of the Oligo-Miocene in the European basins, by means of larger neritic foraminifera
  • Article
  • Full-text available

January 1997

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1,328 Reads

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90 Citations

Bulletin de la Societe Geologique de France

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A. Poignant

Foraminifera are intensively used in the Cenozoic biostratigraphy. Mainly the larger ones are widespread in the shallow deposits. Several groups show a rapid evolution. They allow the establishment of biostratigraphic correlations particularly in the neritic area of the southern European basins. However, as far as the top of the Oligocene and the base of the Miocene are concerned, the construction of a benthic zonation is delicate on account of the inaccurate ages in the Mediterranean given in litteris ; many deposits require a renewed study of their palaeontologic content. Thanks to the representatives of the families Nummulitidae, Miogypsinidae, Lepidocyclinidae, Alveolinidae, 6 biozones have been established since the Rupelian till the Upper Miocene : 3 in the Oligocene and 3 in the Miocene. Moreover, in every biozone, besides the classical zonal markers, we have mentioned additional genera and species of biostratigraphical interest.

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(On the presence of Cycloclypeus and Pararotalia with supplementary equatorial chambers ( Foraminiferida) pointed out for the first time in France, in the upper Oligocene of Aquitaine (southwestern France)).[Sur la presence, dans l'Oligocene superieur d'Aquitaine (Sud- Ouest de la France), de Cycloclypeus et de Pararotalia a loges equatoriales supplementaires (Foraminiferida) signales pour la premiere fois en France.]

January 1987

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5 Reads

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4 Citations

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A. Poignant

Specimens of the genus Cycloclypeus have been collected for the first ime in France in an upper Oligocene exposure of southwestern France (southern Aquitaine). In the same area, Pararotalia with supplementary equatorial chambers, which have only been reported from Mexico, have also been observed. These forms are described and relatd to already known species.-English summary

Citations (5)

... The body of work devoted to the Eocene marine record is the largest (e.g., Plaziat, 1984;Sztrakos et al., 1998), but a few overviews also exist for the Oligocene and the Miocene (Cahuzac et al., 1995;Poignant, 1996, Cahuzac andTurpin, 1999;Cahuzac and Janssen, 2010;Sztrakos and Steurbaut, 2017). Note that the Aquitaine Basin is the locus of two type sections of the International Stratigraphic Scale, namely the Aquitanian (defined in 1858 by K. Mayer Eymar) and the Burdigalian (defined in 1892 by Depéret) (for recent reviews on this topic, see Parize et al., 2008, andLondeix, 2014). ...

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Denudation history and palaeogeography of the Pyrenees and their peripheral basins: an 84-million-year geomorphological perspective
Foraminifères benthiques et Microproblematica du Serravallien d'Aquitaine (Sud-Ouest de la France)
  • Citing Article

  • January 1996

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A. Poignant

... On Socotra Island, it occurs in the uppermost beds of the Wadi Ayak section (Fig. 60) and in isolated samples from the Ashawq Fm. Its biostratigraphic range is Rupelian or SB 21–SB 22 (Schaub 1981; Racey 1994 Racey , 1995 Cahuzac and Poignant 1997; Sirel 2003). Phylum Nummulites garnieri sensu Schaub (1981) Nummulites garnieri DE LA HARPE in Boussac, 1911 Figure Material: Sample DS 5 from eastern Dhofar (Fig. 59). ...

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Middle Eocene-Early Miocene larger foraminifera from Dhofar (Oman) and Socotra Island (Yemen)
Larger benthic foraminifera (Neogene)
  • Citing Article

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A. Poignant

... small Cycloclypeus sp. 2 reported (although not figured) by Cahuzac and Poignant (1987) from the late Oligocene of Aquitaine (southern France). ...

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Late Chattian larger foraminifera from the Prebetic domain (SE Spain): new data on Shallow Benthic Zone 23
(On the presence of Cycloclypeus and Pararotalia with supplementary equatorial chambers ( Foraminiferida) pointed out for the first time in France, in the upper Oligocene of Aquitaine (southwestern France)).[Sur la presence, dans l'Oligocene superieur d'Aquitaine (Sud- Ouest de la France), de Cycloclypeus et de Pararotalia a loges equatoriales supplementaires (Foraminiferida) signales pour la premiere fois en France.]
  • Citing Article

  • January 1987

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A. Poignant

... The studies of previous biostratigraphy for the Asmari Formation are reevaluated by Adams and Bourgeois (1967) The introduced biozones of Adams and Bourgeois (1967) and Wynd (1965) were further refined by Cahuzac and Poignant (1997) as: for the Rupelian, an assemblage zones of Eulepidina formosoides and Nummulites vascus-Nummulites fichteli; for the Early and Late Chattian, an assemblage zones of Nummulites vascus-Nummulites fichteli and Eulepidina as well as Miogypsinoides-Eulepidina respectively. For the Aquitanian ...

Reference:

Depositional Environment and Bio-Sequence Stratigraphic Analysis of the Mishan Formation in the Fars zone, Zagros Basin, Southwest Iran 1 2* 3
An attempt of biozonation of the Oligo-Miocene in the European basins, by means of larger neritic foraminifera

Bulletin de la Societe Geologique de France

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A. Poignant