Campanian to Maastrichtian palynofacies and dinoflagellate cysts of the Silesian Unit, Outer Western Carpathians, Czech Republic

Bulletin of geosciences

Skupien P¹  Mohamed O¹ 

关键词: Silesian Unit;    Cretaceous;    Campanian;    Maastrichtian;    dinoflagellate cysts;    palynofacies;    Carpathians;   

DOI  :  

来源: Czech Geological Survey

【 摘 要 】

Dinoflagellatecystsarereportedfrom20UpperCretaceousclaystonesamplesfromtheGodulaandIstebnaformationsoftheSilesianunit.Age-assessmentofthesedimentsbasedon150speciessuggestsaLateCampaniantoprobablyearliestMaastrichtianageforthemiddleandupperpartoftheGodulaFormationandaEarlyMaastrichtianageforthebasalpartoftheIstebnaFormation.KeybioticeventsareespeciallythefirstoccurrencedatumsofAreoligerasenonensis,Cerodiniumdiebelii,PalaeocystodiniumgolzowenseandTrithyrodiniumevittii,andthelastoccurrencedatumsofOdontochitina,Palaeohystrichophorainfusorioides,Raeteiaediniumtruncigerum,TrihyrodiniumsuspectumandXenascusceratioides.Palynofaciesanalysisshowsdepositioninanoffshoremarineenvironmentsubjectedtoinfluxesofterrestrialmaterial.Organicmatterisdominatedbyphytoclastsandcontainsverylittleamorphousorganicmaterial.Thesuccessionisalsocharacterizedbyalowpercentageofdinoflagellatecystsandaverylowpercentageofsporesandpollengrains.Thepresenceofthermophiliticdinoflagellatecystspointstoawarm-temperatetosubtropicalclimateduringLateCampaniantoEarlyMaastrichtian.

【 授权许可】

Unknown