Microflora y conodontos del Mississippiense en la Fm Gévora (núcleo del Sinforme La Codosera-Puebla de Obando, SO de la Zona Centroibérica)
- R. Rodríguez González 1
- P. Medina Varea 2
- F. González Lodeiro 3
- L.M. Martín Parra 4
- D. Martínez Poyatos 3
- J. Matas 4
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1
Universidad de León
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2
Universidad Complutense de Madrid
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3
Universidad de Granada
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4
Instituto Geológico y Minero de España
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ISSN: 0214-2708
Année de publication: 2007
Volumen: 20
Número: 1-2
Pages: 71-88
Type: Article
D'autres publications dans: Revista de la Sociedad Geológica de España
Résumé
The Gévora Fm widely outcrops in the core of the La Codosera-Puebla de Obando Synform. It is a slaty succession with interbedded sandstones, olistoliths, limestones and diabases. The Gévora Formation and interbedding limestones have been previously correlated with several Devonian formations; however, our biostratigraphical results indicate a Visean age for this Formation. Two slate samples (P2 and P5, located between the Alburquerque and Puebla de Obando villages), have yielded miospore assemblages from Visean age, and of middle/late Visean - upper Visean age, respectively. Futhermore, a limestone sample (C1, La Calera Limestone, located Northwest of La Codosera village) have yielded a conodont assemblage of late early Visean - Serpukhovian age. In addition, a second limestone sample (C2, San Antonio Limestone) contains conodonts of Tournaisian - Serpukhovian age. These data, together with facies similarity, lead us to include the Gévora Formation in the Mississippian «Culm of Pedroches» flysch succession. In fact, La Codosera-Puebla de Obando Synform is the western prolongation of the vast Carboniferous outcrop in Pedroches. These Carboniferous outcrops are bounded to the North by the Puente Génave-Castelo de Vide Shear Zone, which has been recently proposed as the boundary between the Domain of the Schist-Greywacke Complex and a ‘southern Central Iberian domain’ which exhibits a distinctive geology.