The Paleocene/Eocene boundary interval in the Zumaia section (Gipuzkoa, Basque Basin): Magnetostratigraphy and high-resolution lithostratigraphy

  1. J. I. Baceta 1
  2. V. Pujalte 2
  3. J. Dinarès-Turell 3
  4. A. Payros 2
  5. X. Orue-Etxebarria 2
  6. G. Bernaola 2
  1. 1 Universidad de Huelva
    info

    Universidad de Huelva

    Huelva, España

    ROR https://ror.org/03a1kt624

  2. 2 Universidad del País Vasco/Euskal Herriko Unibertsitatea
    info

    Universidad del País Vasco/Euskal Herriko Unibertsitatea

    Lejona, España

    ROR https://ror.org/000xsnr85

  3. 3 Istituto Nazionale di Geofisica e Vulcanologia
    info

    Istituto Nazionale di Geofisica e Vulcanologia

    Roma, Italia

    ROR https://ror.org/00qps9a02

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Journal:
Revista de la Sociedad Geológica de España

ISSN: 0214-2708

Year of publication: 2000

Volume: 13

Issue: 2

Pages: 375-391

Type: Article

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More publications in: Revista de la Sociedad Geológica de España

Abstract

The Zumaia section, in the Basque Basin, has been proposed by several previous authors as a prospective candidate for the Global Stratotype Section and Point of the Paleocenel/Eocene (P/E) boundary. In support of such a proposition, we want to present in this paper new data on this section, which includes: (a) an analysis of the effects on the stratigraphic succession of several small faults that disjoin the P/E boundary interval; (b) a bed-to-bed lithological column of the succession, that provides a firm base for future high-resolution studies of the section; (c) the results of a magnetostratigraphic analysis of the lower part of the P/E boundary interval, which have led to the location of the geomagnetic Chron C25n; (d) the initial results of ongoing high resolution biostratigraphic studies of planktic foraminifers and calcareous nannofossils. Zumaia contains one of the most expansive P/E boundary sections with deep-water marine deposits so far reported, and has already been the subject of several detailed biostratigraphic, mineralogical and chemostratigraphic investigations. Together with these previous studies, the new data presented here contributes to make it one of the best documented P/E boundary sections to date. Zumaia, therefore, will remain as an important reference section even if eventually it is not singled out as the P/E Global Stratotype.

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