Journal article

Stalagmite evidence for the precise timing of North Atlantic cold events during the early last glacial

Russell N Drysdale, Giovanni Zanchetta, John C Hellstrom, Anthony E Fallick, Janece McDonald, Ian Cartwright

GEOLOGY | GEOLOGICAL SOC AMER, INC | Published : 2007

Abstract

Evidence of millennial-scale cold events following the last interglacial are well preserved in North Atlantic marine cores, Greenland ice, and pollen records from Europe. However, their timing was previously undetermined by radiometric dating. We report the first precise radiometric ages for two such events, C23 (105.1 ± 0.9 ka to 102.6 ± 0.8 ka) and C24 (112.0 ± 0.8 ka and 108.8 ± 1.0 ka), based on stable carbon and oxygen isotope measurements on a stalagmite from Italy (CC28). In addition to providing new information on the duration of these events in southern Europe, the age data provide invaluable tuning points for the Mélisey I (C24) and Montaigu (C23) pollen zones identified in western..

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