hltonD eFF nd wrgoldD wF nd tokesD gFF nd rsovD vF nd hykeD eFF nd edmsD FF nd ellrdD F nd erendsD rFiF nd etkinsonD xF nd ettigD tF nd frnettD FtF nd frnettD FvF nd fttersonD wF nd fernthezD F nd forns trD rFF nd frekenridgeD eF nd frinerD tFF nd frourdD iF nd gmpellD tFiF nd grlsonD eFiF nd glgueD tFtF nd gurryD fFfF nd higneultD FeF nd hu¡ eEvouertD rF nd isterrookD hFtF nd prnziD hFeF nd priedrihD rFqF nd punderD F nd quthierD wFF nd qownD eFF nd rrrisD uFvF nd r¡ etuD fF nd rooyerD FF nd tenningsD gFiF nd tohnsonD wFhF nd uehewD eFiF nd uelleyD FiF nd uerrD hF nd uingD iFvF nd ujeldsenD uFuF nd uneleD eFF nd vjeunesseD F nd vkemnD FF nd vmotheD wF nd vrsonD F nd vvoieD wF nd voopeD rFwF nd vowellD FF nd vusrdiD fFeF nd wnzD vF nd wwrtinD sF nd xixonD pFgF nd yhiettiD F nd rkhillD wFeF nd iperD hFtFF nd ronkD eFqF nd ihrdD FtFrF nd idgeD tFgF nd ossD wF nd oyD wF nd emnD eF nd hwD tF nd teD FF nd ellerD tFF nd hompsonD FfF nd horleifsonD rFvF nd ttingD hFtF nd eilletteD tFtF nd rdD fFgF nd eddleD FuF nd right trD rFiF @PHPHA 9en updted rdioronEsed ie mrgin hronology for the lst deglition of the xorth emerin se heet gomplexF9D uternry siene reviewsFD PQR F pF IHTPPQF

Calcareous sediments spanning the last 13 ka fromn I,ake Zeribar, western Iran, were sampled for stable-isotope analysis as a means of augmenting earlier climatic interpretations based on polleni and macrofossils. The Lateglacial period was cold and dry, suLpporting semi-desert vegetation and highly concentrated lake water. Low evaporation rates due to the cold resulted in long residenice times and high lake stands. Durinig the earlv Holocene, the upland vegetation changed to a pistachio-oak savanna as low temperatures and ariditv J ameliorated. Lake level dropped in response to increased evapotranspiration. The low oxygen-isotope values of lacustiine calcite during this period are interpi-eted as a relative increase in the contributioni of winiter moisture rather than overall changes in effective moistuLre. A gradual increase in oak pollen at 7 ka BP signalled the inicrease in effective moisture to levels simiiilar to those of today. At the same tinme the 5`1O values increased.A reflecting a greater percentage of "0-enriched spring rains. Modern values and seasonal distribution of precipi-HOLOCENE tation were established by 6 ka BP. A short-lived return to winter-only precipitation occuiTed at 4.5 ka BP SPECIAL ISSUE and resulted in a temporary increase in anrdity. The covariance among 6'3C, carbonate deposition and 6S'O values suggests that lake productivity is linked to these seasonal climiiatic changes.

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