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Science 13 October 2000:
Vol. 290. no. 5490, pp. 325 - 328
DOI: 10.1126/science.290.5490.325
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Reports

The Last Glacial-Holocene Transition in Southern Chile

K. D. Bennett,1* S. G. Haberle,2 S. H. Lumley3

Warming at the last glacial termination in the North Atlantic region was interrupted by a period of renewed glacial activity during the Younger Dryas chronozone (YDC). The underlying mechanism of this cooling remains elusive, but hypotheses turn on whether it was a global or a North Atlantic phenomenon. Chronological, sedimentological, and palaeoecological records from sediments of small lakes in oceanic southern Chile demonstrate that there was no YDC cooling in southern Chile. It is therefore likely that there was little or no cooling in southern Pacific surface waters and hence that YDC cooling in the North Atlantic was a regional, rather than global, phenomenon.

1 Quaternary Geology, Department of Earth Sciences, Uppsala University, Villavägen 16, S-752 36 Uppsala, Sweden.
2 Department of Geography and Environmental Science, Monash University, Clayton, Victoria 3168, Australia.
3 53 Cavendish Road, Cambridge CB1 3EA, UK.
*   To whom correspondence should be addressed. E-mail: Keith.Bennett{at}geo.uu.se

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