Vegetation and climate in the Miocene deposits of southern side of the Büyük Menderes Graben, Şahinali-2 core, SW Turkey

Bulletin of geosciences

Akkiraz MS¹ 

关键词: Early-Middle Miocene;    Büyük Menderes Graben;    Southeastern Mediterranean;    Palynology;    Palaeoclimate;   

DOI  :  

来源: Czech Geological Survey

【 摘 要 】

Lower-MiddleMiocenesuccessionfromthe?ahinalicoalfield(SWTurkey)wasanalyzedtoreconstructclimateandvegetation.Thesedimentsmainlyrepresentalacustrinefaciesandconsistofamudstone-marldominatedsuccession,includinglimitedcoarse-grainedclastics.Resultsofmicrofloralandpublishedmacrofloralrecordshavebeenconsidered.ThemainvegetationtypesweremixedmesophyticforestdominatedbyevergreenQuercusandconiferousforestconsistingmainlyofindeterminatePinaceae,PinusandCupressaceae.InthisbeltriparianvegetationincorporateshighproportionsofAlnus,andlessamountsofdeciduousSalix,Ulmus,Pterocarya,Carya,Platanus,ZelkovaandLiquidambar.Herbaceouscomponentsinthepollenspectraareinlowfrequencies,andconsistofPoaceae,Brassicaceae,Chenopodiaceae,Ephedra,AsteraceaeandCaryophyllaceae.Alsothreelocalpollenzonescanberecognizedbasedonthechangesinrelativeabundancesofpalynomorphs.Themicro-andpublishedmacrofloralrecordshavebeensubjectedtotheCoexistenceApproachmethodtoobtainthepalaeoclimate.Meanannualtemperatureisestimatedtobeover14deg;Candmeanannualprecipitationexceeds1000mm.Incombinationwithotherclimateparameters(temperaturesofwarmestandcoldestmonths,precipitationofthewettest,driestandwarmestmonths),thedataindicateverystablewarm-temperatewithhighannualprecipitation.ResultsoftheCoexistenceApproachusingbothsporomorphandleafdatasetsaregoodinagreement,implyinginternalconsistencyinthemethod.Comparedwithmodernmeteorologicalrecords,surroundingsoftheBüyükMenderesGrabenhadsimilartemperatureandhigherprecipitationduringtheEarly–MiddleMiocene.ThisstudycontributestoanunderstandingoftheMiocenevegetationandclimateevolutioninsoutheasternMediterraneanarea.

【 授权许可】

Unknown