The invertebrate fauna of the Middle Miocene (Lower Badenian) sediments of Kralice nad Oslavou (Central Paratethys, Moravian part of the Carpathian Foredeep)

Bulletin of geosciences

Nehyba S¹  Holcová K¹  Kroh A¹  Hladilová Å ¹  ZágorÅ¡ek K¹ 

关键词: Bryozoa;    Foraminifera;    Echinodermata;    Mollusca;    palaeoecology;    Middle Miocene;    Carpathian Foredeep;    Czech Republic;   

DOI  :  

来源: Czech Geological Survey

【 摘 要 】

AnartificialoutcropofMiddleMiocenesedimentsatKralicenadOslavouhasbeenstudiedindetail,allfragmentsretrievedfromthebulksampleswereevaluatedanddescribed.Themostcommonfossilswerebryozoans,foraminifersandechinoderms,butmolluscsalsooccured.ForaminiferalevidenceindicatesanassignmenttothelowerpartoftheUpperLagenidZone(LowerBadenian–Langhian,MiddleMiocene);thecalcareousnannoplanktonischaracteristicforthezoneNN5.Intheupperpartoftheprofile,anincreasedamountofvolcanicmaterialcanberecognised.Basedonananalysisofthefaunalcomposition,thepalaeoenvironmentalevolutionofthesectionhasbeeninvestigated.Thesedimentsatthebaseofthesectionoriginatefromadeepermarinebasinandwelloxygenatedbottomwaters.Afirstbryozoaneventcanberecordedinthisinterval.Above,foraminiferalevidencepointstoincreaseddepthanddecreasedoxygenlevels,coincidingwithanabundancepeakofmolluscsandasteroids,butdisappearanceofbryozoans.Intheupperhalfofthesection,conditionschangedconsiderably.Thefaunalcontentindicatesashallow-marineenvironmentwithnormalmarinesalinityandhighoxygenlevels.Echinodermsandbryozoansexhibithighdiversitiesinthisinterval.Thesedrasticchangesarerelatedheretochangesinbasingeometry.Increasedvolcanicactivityinthehinterlandwasdocumentedbyvolcano-detriticmaterialinthesediment.NeotypesofbryozoansKionidellamoravicensisProcházka,1893andUmbonulaspinosa(Procházka,1893)aredesignated.

【 授权许可】

Unknown