Linking Palaeozoic palaeogeography of the Betic Cordillera to the Variscan Iberian Massif: new insight through the first conodonts of the Nevado-Filábride Complex

Graphite-rich metamorphic limestones included within low-grade black schists of the lowest Nevado-Filábride tectonic unit in the Sierra de Baza (Bodurria Unit) provided the first conodonts found in this complex ( Declinognathodus bernesgae, D. inaequalis. D . cf. praenoduliferus , and Idioprioniodus...

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Bibliographic Details
Published in:International journal of earth sciences : Geologische Rundschau 2018-07, Vol.107 (5), p.1791-1806
Main Authors: Rodríguez-Cañero, Rosario, Jabaloy-Sánchez, Antonio, Navas-Parejo, Pilar, Martín-Algarra, Agustín
Format: Article
Language:English
Subjects:
Anoxia
Continental margins
Earth and Environmental Science
Earth science
Earth Sciences
Geochemistry
Geology
Geophysics/Geodesy
Isotopes
Marine environment
Metamorphism
Mineral Resources
Original Paper
Palaeogeography
Palaeozoic
Paleozoic
Schists
Sedimentology
Stratigraphy
Structural Geology
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Summary:Graphite-rich metamorphic limestones included within low-grade black schists of the lowest Nevado-Filábride tectonic unit in the Sierra de Baza (Bodurria Unit) provided the first conodonts found in this complex ( Declinognathodus bernesgae, D. inaequalis. D . cf. praenoduliferus , and Idioprioniodus sp.). This demonstrates the early Bashkirian age of the sedimentary protoliths, and their deposition in open marine anoxic environments of a continental margin that opened towards the E and that was related to the Palaeotethys. This breakthrough offers strong support for the hypothesis that the lower Nevado-Filábride units show stratigraphic and palaeogeographic affinities with the external domains of the Iberian Massif (Palentian Domain of the Cantabrian Zone in particular). Consequently, this part of the Betic Internal Zones must be related to the basement of the South-Iberian Palaeomargin and excluded from the Alborán Domain tectonostratigraphic terrane.
ISSN:1437-3254
1437-3262
DOI:10.1007/s00531-017-1572-8