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STRATI 2013 pp 79-83 | Cite as

In Search of the Bartonian (Middle Eocene) GSSP (II): Preliminary Results from the Oyambre Section (Northern Spain)

  • Jaume Dinarès-TurellEmail author
  • Aitor Payros
  • Simonetta Monechi
  • Xabier Orue-Etxebarria
  • Silvia Ortiz
  • Estibaliz Apellaniz
  • Gilen Bernaola
Conference paper
Part of the Springer Geology book series (SPRINGERGEOL)

Abstract

The Global Stratotype Section and Point (GSSP) for the base of the Bartonian (middle Eocene) stage is as yet undefined. Here, we assess the GSSP potential of the La Acebosa Formation exposed on the eastern side of the Cape of Oyambre (San Vicente de la Barquera, province of Cantabria, northern Spain). Sedimentological and benthic foraminiferal data indicate that the La Acebosa Formation represents a bathyal environment related to a deepening, eastward-facing slope. Preliminary planktic foraminiferal and calcareous nannofossil results show that the upper part of the section corresponds to zones E11 and CP14a, respectively, and thus could include the Lutetian–Bartonian boundary. Although the quality of demagnetization is quite poor, preliminary magnetostratigraphic data suggest that Chron C19n, which is most likely to define the Bartonian GSSP, could be recorded in the upper part of the La Acebosa Formation. A denser magnetostratigraphic and biostratigraphic sampling is required in the upper part of this unit in order to accurately identify Chron C19n and to establish the sequence of events across the Lutetian–Bartonian transition.

Keywords

Eocene Bartonian GSSP Pyrenees Cantabria Oyambre 

Notes

Acknowledgments

Research funded by the Basque Government project GIC07/122-IT-215-07 and the Spanish Government projects CGL 2011-23770 and CGL 2011-23077.

References

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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Jaume Dinarès-Turell
    • 1
    Email author
  • Aitor Payros
    • 2
  • Simonetta Monechi
    • 3
  • Xabier Orue-Etxebarria
    • 2
  • Silvia Ortiz
    • 2
  • Estibaliz Apellaniz
    • 2
  • Gilen Bernaola
    • 4
  1. 1.Istituto Nazionale di Geofisica e VulcanologiaRomeItaly
  2. 2.Fac. CienciasEstratigrafía-PaleontologíaBilbaoSpain
  3. 3.Dipartamento di Scienze della TerraUniversità di FirenzeFlorenceItaly
  4. 4.Department Ingeniería MineraEsc. Univ. Ing. Téc. MinasBilbaoSpain

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