Eifelian (Middle Devonian) to Lower Frasnian (Upper Devonian) conodont biostratigraphy in the Villech section (Spanish Central Pyrenees)

Bulletin of geosciences

Valenzuela-Ríos JI¹  Liao J-C¹  Gouwy S¹ 

关键词: conodonts;    Middle Devonian;    biostratigraphy;    Spanish Central Pyrenees;   

DOI  :  

来源: Czech Geological Survey

【 摘 要 】

ConodontbiostratigraphicresearchontheComabellaFormationatVillech(SpanishCentralPyrenees),a54mthickpinkish-greyishcompacthemipelagiclimestonesectionsituatedintheCompte"subfaciesarea",revealsanEifeliantoearlyFrasnianageforthestudiedinterval.ThebaseoftheFormationisoflowerEifelianage(costatusZone),indicatedbythelowestlocalrecordofPolygnathusangustipennatus,associatedwithP.partitus.Thekockelianusandeifliuszonesarerecognizedinthelowerhalfofthesection.TheuppermostEifelianandlowermostGivetian(ensensisandhemiansatuszones,respectively)havenotbeenfoundsofarbutmightbelocatedinacoveredinterval.Otherbiozonesrecognizedinthesectionarethetimorensis-rhenanus/varcus,ansatus,semialternans,hermanni,disparilisandnorrisizonesintheGivetian,allindicatedbytheirrespectiveindexspeciesandtheMN1Zone(occurrenceofAd.binodosaandAd.pristina)intheFrasnian.AblackshaleandlimestonelayerintheupperpartoftheVillechsectioncouldrepresentthelocalsignatureoftheupperpartoftheglobalTaghanicCrisis.

【 授权许可】

Unknown