简介：差错露头和沟节的分析与0.047mm/a和1.1米的平均排水量的最大的率在Epipleistocene的底部paleosol层上显示0.2m6.0m的差错排水量。这项活动在迟了的Epipleistocene在差错表面上作为裂缝出现，没有明显的排水量。差错活动是弱的，最活跃的片断是Bailuynan片断。

简介：作为在拉萨区域的迟了的更新世的大多数进口差错，Nalinlaka差错是一个左侧面的戳差错，打击NWW，蘸有一个高剧降角度的SSW，并且在Nalinlaka差错地区上在最近的阶层上在33km.According上延长到研究，自从迟了的更新世和运动在地球的表面上留下了一些geomorphologic现象，这个差错地区显然是活跃的，特别在Cijiaolin并且在Xiecunvillage.For例子附近的溪谷西方的地点，某riv

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简介：AmarinestratigraphicsequenceacrossthePliocene/Pleistoceneboundaryhasbeenfoundinthenorth-erncontinentalshelfoftheSouthChinaSea.ThemarineQuaternarydepositsintheYinggehaiBasinmayex-ceed2,000minthickness,probablyprovidingthebestsectionforstudyingthelowerboundaryofthemarinePleistoceneinSouthChina.TheverticalsuccessionwithplanktonicforaminifersandnannofossilsrevealedinboreholesinthebasinhasbeenwellcorrelatedwiththatintheinternationalstratotypesectionofthePliocene/PleistoceneboundaryatVrica,Italy,resultingintheacquirementofabiostratigraphicboundaryat1.64Ma.Thisboundary,however,doesnotcoincidewithanyprominentlithologicalpalaeoenvironmentalchangesinthestudyareaandcanhardlybeusedingeologicalpractice.Thereare,incontrast,significantchangesatthelevelofLADofGloborotaliamulticameratasensulatolocatedbelowtheabove-mentionedboundary.Thepercentageofplanktonicforaminifersinthetotalpopulationandpreservationofforaminiferaltestsdisplaygreatchangesatthislevelcorrespondingtoaclearonlapontheseismicprofilesandindicatingadepositionalhiatusatca.2.0-2.5Ma.SincethelevelcanbewidelytracedinthePearlRiverMouthBasinandtheBeibuGulfBasinandwellcorrespondswiththemarkeddepositionalenvironmentalchangesrecordedinthewestPacificandotherregions,itisrecommendedthatthePlio/PleistoceneboundarybedrawnatthelevelofGr.multicameratasensulatoLAD,roughlyconcurrentwiththeGauss/Matuyamaturn.

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简介：MicromorphologicalcharacteristicsoffourpaleosollevelsoftheManonga-WemberedepositsinCentralTanzaniaindicateperiodsofwetterclimateinthePliocenethanatpresent.Thestratigraphyofthestudiedsectionshowsaseriesoflacustrinecalcareousclaysedimentsalternatingwithgravel,sandandsilt.ThesedimentsarebelievedtohavebeendepositedintheManonga-Wemberepaleolakeenvironment.Paleosolsintercalatethesesedimentsandwereformedwhenstablelandscapesdevelopedonformerlakebedsduringregressionperiods.MicromorphologicalfeaturesofthepaleosolsindicatestrongclayilluviationofredtoyellowtypicclaycoatingandsomeFe-Mnhydoxidehypocoatingsinvoidsandchannels.Thegroundmassconsistsofeitheranaccumulationofbioturbatedyellowtoredclaycoatingfragmentsoranargillicredtoyellowgroundmassofclaymass.Suchanilluviationanditsassociatedgroundmassiscomparabletointenseclayilluviationfrontsthatarefoundinpresent-daycalcareoussedimentsofwarmandwetclimates.ThepaleosollevelsthereforerepresentwetterclimaticconditionsthantodayintheareaduringtheLowerPliocene.

简介：Thisstudyisthefirsttoreporttheradiocarbonages,mineralogical,morphological,geochemicalandstableisotopecompositionsofcalcretesfromNeogenesedimentsaroundlakesEymirandMoganintheG?lba??BasinofCentralAnatolia.MorphologicallydifferentformsofcalcretesintheG?lba??Basinincludepowdery,nodular,fractureinfill,laminarandhardpantypes.Calciteisthedominantmineralofcalcretecompositions;thediagnosticfeaturesofdessicationcracks,randomfractures,MnOliningsanddensespariticinfillingsareobserved.Chemicalanalysesshowaridconditionswithmeanannualprecipitationof<50mm.δ13Ccompositionsofthecalcretesrangefrom-6.77‰to-9.32‰PDB,typicalformostpedogeniccalcretes,reflectingthedevelopmentunderseasonallyaridclimatesandC3-dominatedvegetationcover.δ18Ovaluesarebetween-5.57‰and-7.80‰PDB,indicatingtheformationfrommeteoricwaterinavadosezoneenvironment.TheresultssuggestthattheMiddlePleistocenewasariderandwarmer,favouringtheformationofpalygorskiteinassociationwiththedifferentformsofcalcreteoccurrences,whereastheLatePleistocenewasdryerandcooler,supportingthedevelopmentofcalcretes.