 |
| Titel |
Lower Bashkirian conodonts from the Nevado-Filábride complex (Betic Cordilleras, Spain): tectonic and palaeogeographic implications |
| VerfasserIn |
Rosario Rodríguez Cañero, Antonio Jabaloy Sánchez, Pilar Navas Parejo, Agustín Martín Algarra |
| Konferenz |
EGU General Assembly 2017
|
| Medientyp |
Artikel
|
| Sprache |
en
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250149565
|
| Publikation (Nr.) |
 EGU/EGU2017-13925.pdf |
|
|
|
|
|
| Zusammenfassung |
| The Nevado-Filábride Complex is a fragment of the Variscan-Alleghanian belt that
was recycled during the Alpine Orogeny. This makes difficult the interpretation of
its pre-Mesozoic tectonic provenance and of general palaeogeographic meaning.
However, it is a key terrain to understand the geometry and the evolution of the Betic
Orogen. Here, we report for the first time the presence of lower Bashkirian conodonts
(Declinognathodus bernesgae, D. inaequalis, D. praenoduliferous and Idioprioniodus sp.
elements) in black limestones at the base of the Aulago Fm in the lowest tectonic
unit of the Nevado-Filábride Complex (Bodurria Unit). The samples come from
graphite-rich thin fine detrital marble horizons between fine-grained low-grade
slates with some rippled quartzite horizons. These metasediments were deposited in
moderately deep and calm anoxic marine environments, only sporadically affected
by bottom currents. This finding supports a correlation of the Nevado-Filábride
terrains to the Cantabrian and the West Asturian Leonese tectono-palaeogeographic
realms of the Variscan Iberian Massif. This correlation indicates that, below the Betic
deformational front, the Iberian palaeogeographic realms continued towards the SE
to connect with the continental margin related to the westernmost Palaeotethys. |
|
|
|
|
|
|