A proposed crinoid zonation of the Devonian deposits of eastern Transbaikal

Bulletin of geosciences

Kurilenko AV¹  Kulkov NP¹ 

关键词: Devonian;    crinoid biozonation;    brachiopods;    assemblages;    biostratigraphy;    Transbaikal;   

DOI  :  

来源: Czech Geological Survey

【 摘 要 】

DevoniandepositsofeasternTransbaikal,Russia,arewidelydistributedintheOnon,ArgunandUpperAmurterranes,eachwithadifferentgeologicaldevelopmenthistory.Twolithofaciesarerepresentedinthegeologicalsection:carbonate-volcanogenic-terrigenous(Ononterrane)andterrigenous-carbonate(ArgunandUpperAmurterranes),withstratainthelattercharacterizedbyabundantfossilremains,especiallynumerouscrinoidsandbrachiopods.BrachiopodassemblagesarestatedforeachstrataoftheTransbaikalDevonian.AcrinoidbiostratigraphiczonationisproposedwithintheMongol-Okhotskfoldbeltasfollows:Scyphocrinitesmariannae,CostatocrinusbicostatusandTastjicrinuspaucicostatus(LowerLochkovian);Amazaricrinusildicanensis(Pragian);Paradecacrinusorientalis(Emsian);RaricrinusminimusandVasticrinusvastus(Eifelian);Ononicrinusgracilis(Givetian);Hexacrinites?stukalinaesp.nov.(Frasnian)andPlatycrinites?subtuberosus(UpperFamennian).Localandregionalcrinoidagesaccordwellwiththoseofbrachiopods.Lateraldistributionoffaunalassemblagesallowsregionalcorrelation.

【 授权许可】

Unknown