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- Title
Systematics of Lutetian larger foraminifera and magnetobiostratigraphy from the South Pyrenean Basin (Sierras Exteriores, Spain).
- Authors
Silva-Casal, Roi; Serra-Kiel, Josep; Rodríguez-Pintó, Adriana; Pueyo, Emilio L.; Aurell, Marc; Payros, Aitor
- Abstract
A systematic description of the Eocene larger foraminifera recorded in the South Pyrenean Basin (Sierras Exteriores) is presented herein. The large dataset provided in this work includes Nummulites and Alveolina species, along with a variety of other porcellaneous and hyaline taxa with lesser biostratigraphic relevance. Most of the larger foraminifera described in this work correspond to the Lutetian (SBZ13 to SBZ16 biozones) interval, but late Ypresian (SBZ11, Cuisian) and early Bartonian (SBZ17) shallow benthic zones have also been identified. A new species, Idalina osquetaensis, is described. The systematic revision of middle to late Lutetian alveolines led to a reassessment of Alveolina fusiformis and the finding of two new precursor forms, described as Alveolina aff. fragilis and Alveolina aff. elongata. The new taxa fill in the gap existing so far in the middle to late Lutetian alveolinid biostratigraphy. Despite not being exclusive to SBZ16, these forms provide realiable biostratigraphic information in facies where Nummulites are not present. This realibility lies on the correlation of Nummulites and Alveolina biostratigraphic markers in the same sections and their calibration to the global time scale through magnetostratigraphy.
- Subjects
PYRENEES; BENTHIC zone; EOCENE Epoch; FORAMINIFERA; PALEOMAGNETISM; BIOSTRATIGRAPHY; FACIES; PALEOGENE
- Publication
Geologica Acta, 2021, Vol 19, Issue 1, p1
- ISSN
1695-6133
- Publication type
Article
- DOI
10.1344/GeologicaActa2021.19.7