Articles | Volume 43, issue 1
https://doi.org/10.5194/jm-43-55-2024
https://doi.org/10.5194/jm-43-55-2024
Research article
 | 
11 Apr 2024
Research article |  | 11 Apr 2024

Nannofossils from the Middle Eocene Sabiñánigo Sandstone Formation in the Jaca Basin (southern Pyrenees): biostratigraphy and paleoenvironmental implications

Elizabeth R. Lasluisa, Oriol Oms, Eduard Remacha, Alba González-Lanchas, Hug Blanchar-Roca, and José Abel Flores

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Cited articles

Agnini, C., Muttoni, G., Kent, D. V., and Rio, D.: Eocene biostratigraphy and magnetic stratigraphy from Possagno, Italy: The calcareous nannofossil response to climate variability, Earth Planet. Sc. Lett., 241, 815–830, https://doi.org/10.1016/j.epsl.2005.11.005, 2006. 
Agnini, C., Fornaciari, E., Rio, D., Tateo, F., Backman, J., and Giusberti, L.: Responses of calcareous nannofossil assemblages, mineralogy, and geochemistry to the environmental perturbations across the Paleocene/Eocene boundary in the Venetian Pre-Alps, Mar. Micropaleontol., 63, 19–38, https://doi.org/10.1016/j.marmicro.2006.10.002, 2007. 
Agnini, C., Fornaciari, E., Raffi, I., Catanzariti, R., Pälike, H., Backman, J., and Rio, D.: Biozonation and biochronology of Paleogene calcareous nannofossils from low and middle latitudes, Newsl. Stratigr., 47, 131–181, https://doi.org/10.1127/0078-0421/2014/0042, 2014. 
Aubry, M. P.: Late Paleogene calcareous nannoplankton evolution: a tale of climatic deterioration, in: Eocene–Oligocene climatic and biotic evolution, edited by: Prothero, D. R. and Berggren, W. A., Eocene–Oligocene Climatic and Biotic Evolution, Princeton, Princeton University Press, 135, 272–309, https://doi.org/10.1515/9781400862924, 1992. 
Aubry, M. P.: Early Paleogene Calcareous nannoplankton evolution: a tale of climatic amelioration, in: Late Paleocene–early Eocene Biotic and Climatic Events in the Marine and Terrestrial Records, edited by: Aubry, M.-P., Lucas, S., and Berggren, W. A., Columbia University Press, 158–201, ISBN 9780231102384, 1998. 
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We studied sediment samples containing marine plankton under the polarized microscope from the Sabiñánigo sandstone formation, a geological formation located in the Jaca Basin in Spain. The main result of this work was a more precise age for the formation, the Bartonian age, in the Middle Eocene period. In addition, we obtained information on the temperature of the ocean water in which the plankton lived, resulting in the surface ocean waters in this area being warm and poor in nutrients.