Per citar aquest document: http://ddd.uab.cat/record/145076
Palynological age constraint of Les Vilelles unit, Catalan Coastal Chain, Spain.
González, F. (Universidad de Huelva. Departamento de Geología)
Moreno, C. (Universidad de Huelva. Departamento de Geología)
Melgarejo i Draper, Joan-Carles (Universitat de Barcelona. Departament de Cristal·lografia, Mineralogia i Dipòsits Minerals)
Sáez, R. (Universidad de Huelva. Departamento de Geología)

Data: 2015
Resum: Les Vilelles unit is a detrital sequence exposed at the southwestern margin of the Catalan Coastal Chain (CCC), NE Spain, below the Carboniferous turbiditic series. Based on the palynological content, the age of this unit was initially assigned to the Middle-Late Devonian (Eifelian to Famennian). Additional radiolarian and conodont findings were considered to be Early–Middle Mississippian (Tournaisian to early Visean). To clarify this age discrepancy a new and more comprehensive palynostratigraphic analysis has been conducted in the upper part of the section representative of Les Vilelles unit. This has provided an assemblage of miospores, acritarchs, prasinophyta phycomata and chitinozoans that can be confidently assigned to a latest Frasnian interval, in contact with the Frasnian–Famennian boundary. Therefore, the present analysis refines the Middle–Late Devonian age formerly assigned, establishes a latest Frasnian age for the top of the unit, and provides new insights to the better understanding of the unconformity and hiatus separating the pre-Carboniferous and Carboniferous CCC series in the Priorat Massif. The study also includes a systematic section with the description of three newly established miospore species: Dibolisporites coniugatum, Dibolisporites prioratum and Rugospora spinosa.
Drets: Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, sempre i quan aquestes es distribueixin sota la mateixa llicència que regula l'obra original i es reconegui l'autoria. Creative Commons
Llengua: Anglès.
Document: article ; recerca ; publishedVersion
Matèria: Les vilelles unit ; Catalonian coastal ranges ; Palynology ; Late devonian ; Frasnian-famennian
Publicat a: Geologica acta, Vol. 13 Núm. 4 (December 2015) , p. 345-362 (Articles) , ISSN 1696-5728

Adreça alternativa: http://www.raco.cat/index.php/GeologicaActa/article/view/302724
DOI: 10.1344/GeologicaActa2015.13.4.7


18 p, 1.7 MB

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