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The Holocene, Vol. 7, No. 3, 325-329 (1997)
DOI: 10.1177/095968369700700308

Late-Holocene rodent middens from Rio Limay, Neuquen Province, Argentina

Vera Markgraf

Institute of Arctic and Alpine Research, University of Colorado, Boulder, Co 80309-0450, USA

Julio Betancourt

US Geological Survey, Water Resources Division, Desert Laboratory, 1675 W. Anklam Road, Tucson, Arizona 85745, USA

Kate Aasen Rylander

US Geological Survey, Water Resources Division, Desert Laboratory, 1675 W. Anklam Road, Tucson, Arizona 85745, USA

Pollen analysis of late-Holocene amberat deposits from two caves near the forest-steppe ecotone in northern Patagonia documents a major shift from Austrocedrus-Nothofagus forest to steppe shrub assemblages some time after 1800 and before 1300 BP. The probable explanation of the reduction of tree taxa calls for either drier summers or intensified land use or a combination of both.

Key Words: Rodent middens • pollen analysis • forest-steppe ecotone • caves • late-Holocene • Patagonia • Argentina.


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