The Khos-Nelege River section of the Ogon’or Formation: a potential candidate for the GSSP of Stage 10, Cambrian System

Bulletin of geosciences

Lazarenko NP¹  Abaimova GP¹  Pegel TV¹  Gogin IY¹ 

关键词: Cambrian;    Stage 10;    trilobite;    GSSP;    Lotagnostus americanus;    Russia;   

DOI  :  

来源: Czech Geological Survey

【 摘 要 】

TheInternationalSubcommissiononCambrianStratigraphy(ISCS)hasrecommendedasubdivisionoftheCambrianSystemintofourseriesandtenstages.Thefirstappearancedatum(FAD)ofthecosmopolitanagnostoidtrilobiteLotagnostusamericanushasbeenchosenasagoodindicatorforthebaseoftheuppermostCambrianstage(Stage10).TheKhos-Nelegesectionlocatedinthenorth-easternSiberianPlatform(WesternYakutia,Russia)isproposedastheGlobalStandardStratotypeSectionandPoint(GSSP)forthebaseofthe‘CambrianStage10’.TheproposedGSSPcoincideswiththeFADofL.americanusat339mabovethebaseoftheOgon’orFormation.ThesectionfulfillsthegeologicalandbiostratigraphicalrequirementsforastratotypeandtheGSSPhorizoncanbeconstrainedbyanumberofauxiliarymarkertaxa.ThefirstappearanceofL.americanusisaneasilyrecognizablelevelintheCambrianwhichcanberecognizedfromallmajorCambriancontinents,includingBaltica,Laurentia,Avalonia,SouthChinaandAustralia.

【 授权许可】

Unknown