Abstract
Sediment cores from Lake Zeribar in the Zagros Mounitains of western Iran provide a record of changes in the diatom flora since about 40 ka. Conductivity transfer functionis applied to diatom records from the lake indicate generally higher conductivity during the Last Glacial Maximum and Lateglacial, especially between 15.0 and 10.5 ka. This observation is consistent with previous interpretations of relatively arid conditions during this interval based on the Lake Zeribar pollen records. Oscillations between high- and lowconductivity states during this interval additionally suggest changes in precipitation associated with millennialscale climate events, with relatively dry conditions during the Younger Dryas. Diatom-inferred conductivity is relatively low throughout the Holocene. Shifts in diatomn composition occur in the Holocene record; however. minor variations in reconstrtucted conductiVity are not considered significant.
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