Fossil assemblages and biostratigraphy of metamorphic rocks of the Nevado-Filábride Complex from the Águilar tectonic arc (SE Spain)

Autores/as

  • Casto Laborda-López Departamento de Geología, Universidad de Jaén
  • Julio Aguirre Departamento de Estratigrafía y Paleontología, Universidad de Granada
  • Stephen K Donovan Department of Geology, Naturalis Biodiversity Center, The Netherlands
  • Pilar Navas-Parejo Instiuto de Geología, Estación Regional del Noroeste, Universidad Nacional Autónoma de México
  • Sergio Rodríguez UEI-Departamento de Paleontología (CSIC-UCM), Universidad Complitense de Madrid

DOI:

https://doi.org/10.7203/sjp.30.2.17257

Palabras clave:

Invertebrate fossils, Early Devonian, Internal Zones, Murcia, Betic Cordillera

Resumen

Abundant marine macrofossils are present in graphitic marbles and calc-silicate schists belonging to the Veleta nappe of the Nevado-Filábride Complex (Internal Zones of the Betic Cordillera, SE Spain), in what is called the Águilas tectonic arc. These fossils have resisted metamorphism and deformation, and in some instances have been finely preserved. The fossil assemblages are dominated by crinoids, followed by minor cephalopods, brachiopods, rugose corals, and putative sections of trilobites. In addition to these confidently identified groups, there are other fossil represented, but deformation and extensive recrystallization have destroyed anatomical characters, hampering their taxonomic identification. Among the crinoids, the columnal parataxa Pentagonopentagonalis (col.) and Bystrowicrinus (col.) have been recognized. Planispiral cephalopods assigned to either primitive ammonoids attributable to the order Agniatitid (one of them being a possible member of the family Mimosphinctidae) or coiled nautilids, as well as orthoconid sections of possible orthoceratids or bactritids are present. Finally, there are rugose coral attributable to the family Phillipsastreidae, possibly Peneckiella. Among the remains with obscure taxonomic assignment, we recognize possible laminar calcareous algae an benthic foraminifers Finally, irregular, massive structures showing a rough laminar organization and longitudinal tubes with rounded sections are found in some black marble beds. These can be identified either as possible chaetetids or bryozoans. The report of these taxa has limited the rocks studied to the Emsian, late Early Devonian

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Publicado

2020-05-09

Cómo citar

Laborda-López, C., Aguirre, J., Donovan, S. K., Navas-Parejo, P., & Rodríguez, S. (2020). Fossil assemblages and biostratigraphy of metamorphic rocks of the Nevado-Filábride Complex from the Águilar tectonic arc (SE Spain). Spanish Journal of Palaeontology, 30(2), 275–292. https://doi.org/10.7203/sjp.30.2.17257
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