Fossil associations from the middle and upper Eocene strata of the Pamplona Basin and surrounding areas (Navarre, western Pyrenees)

  • Humberto Astibia Departamento de Estratigrafía y Paleontología, Facultad de Ciencia y Tecnología, Universidad del País Vasco/Euskal Herriko
  • Aitor Payros Departamento de Estratigrafía y Paleontología, Facultad de Ciencia y Tecnología, Universidad del País Vasco/Euskal Herriko
  • Silvia Ortiz PetroStrat Ltd, Tan-y-Graig, Parc Caer Seion, Conwy, Wales
  • Javier Elorza Departamento de Mineralogía y Petrología, Facultad de Ciencia y Tecnología, Universidad del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU),
  • German Álvarez-Pérez Departament d’Estratigrafia, Paleontologia i Geociències Marines. Universitat de Barcelona
  • Ainara Badiola Departamento de Estratigrafía y Paleontología, Facultad de Ciencia y Tecnología, Universidad del País Vasco/Euskal Herriko
  • Nathalie Bardet Centre de recherche sur la paléobiodiversité et les paléoenvironnements (CR2P), UMR 7207 du CNRS, Département Histoire de la Terre, Muséum National d’Histoire Naturelle,
  • Ana Berreteaga Departamento de Estratigrafía y Paleontología, Facultad de Ciencia y Tecnología, Universidad del País Vasco/Euskal Herriko
  • Sebastián Calzada Museu Geòlogic del Seminari de Barcelona
  • José Carmelo Corral Arabako Natur Zientzien Museoa/Museo de Ciencias Naturales de Álava, Siervas de Jesús
  • Ignacio Díaz-Martínez CONICET-Instituto de Investigación en Paleobiología y Geología, Universidad Nacional de Río Negro, General Roca 1242, 8332 General Roca
  • Didier Merle Centre de recherche sur la paléobiodiversité et les paléoenvironnements (CR2P), UMR 7207 du CNRS, Département Histoire de la Terre, Muséum National d’Histoire Naturelle,
  • Jean-Michel Pacaud Centre de recherche sur la paléobiodiversité et les paléoenvironnements (CR2P), UMR 7207 du CNRS, Département Histoire de la Terre, Muséum National d’Histoire Naturelle,
  • Xabier Pereda-Suberbiola Departamento de Estratigrafía y Paleontología, Facultad de Ciencia y Tecnología, Universidad del País Vasco/Euskal Herriko
  • Andrzej Pisera Institute of Paleobiology, Polish Academy of Sciences, ul. Twarda 51/55, PL-00-818 Warsaw
  • Francisco Javier Rodríguez-Tovar Departamento de Estratigrafía y Paleontología, Facultad de Ciencias, Universidad de Granada
  • Josep Tosquella Departamento de Geodinámica y Paleontología, Facultad de Ciencias Experimentales, Campus del Carmen, Universidad de Huelva
  • M.A. Bitner Institute of Paleobiology, Polish Academy of Sciences, ul. Twarda 51/55, PL-00-818 Warsaw,
Keywords: Fossil associations, Paleogene, turbidites, delta, shallow-marine, Pyrenean area

Abstract

Fossil associations from the middle and upper Eocene (Bartonian and Priabonian) sedimentary succession of the Pamplona Basin are described. This succession was accumulated in the western part of the South Pyrenean peripheral foreland basin and extends from deep-marine turbiditic (Ezkaba Sandstone Formation) to deltaic (Pamplona Marl, Ardanatz Sandstone and Ilundain Marl formations) and marginal marine deposits (Gendulain Formation). The micropalaeontological content is high. It is dominated by foraminifera, and common ostracods and other microfossils are also present. The fossil ichnoasssemblages include at least 23 ichnogenera and 28 ichnospecies indicative of Nereites, Cruziana, Glossifungites and ?Scoyenia-Mermia ichnofacies. Body macrofossils of 78 taxa corresponding to macroforaminifera, sponges, corals, bryozoans, brachiopods, annelids, molluscs, arthropods, echinoderms and vertebrates have been identified. Both the number of ichnotaxa and of species (e. g. bryozoans, molluscs and condrichthyans) may be considerably higher. Body fossil assemblages are comparable to those from the Eocene of the Nord Pyrenean area (Basque Coast), and also to those from the Eocene of the west-central and eastern part of South Pyrenean area (Aragon and Catalonia). At the European scale, the molluscs assemblages seem endemic from the Pyrenean area, although several Tethyan (Italy and Alps) and Northern elements (Paris basin and Normandy) have been recorded. Palaeontological data of studied sedimentary units fit well with the shallowing process that throughout the middle and late Eocene occurs in the area, according to the sedimentological and stratigraphical data.

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Published
2016-04-26
How to Cite
Astibia H., Payros A., Ortiz S., Elorza J., Álvarez-Pérez G., Badiola A., Bardet N., Berreteaga A., Calzada S., Corral J. C., Díaz-Martínez I., Merle D., Pacaud J.-M., Pereda-Suberbiola X., Pisera A., Rodríguez-Tovar F. J., Tosquella J. y Bitner M. (2016). Fossil associations from the middle and upper Eocene strata of the Pamplona Basin and surrounding areas (Navarre, western Pyrenees). Journal of Iberian Geology, 42(1), 7-28. https://doi.org/10.5209/rev_JIGE.2016.v42.n1.51601
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Articles