OfthediatomsfromsedimentsoftheSouthChinaSea,mainlycomposedofplanktonicspeciesoftropicalandsubtropicalzones,36generaand86speciesareidentified.Basedonthechangesindiatomnumbersandtheappearanceofdiatomassemblages,sixdiatomzonesaredistinguishedinCoreV,reflectingsixphasesofpaleoclimatc,paleo-watertemperatureandpaleogeography.AccordingtotheQuaternaryclimaticpision,thesezonesrepresenthotweatherandwarmweatherasawhole,andtheyareseparatelyequaltopostglacialperiod,theHolocene;Wurmglacialperiod;Riss-Wurminterglacialperiod;andRissglacialperiod,theLatePleistocene.