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Radiocarbon Dates on Deglaciation, Cordillera Central, Northern Peruvian Andes

Published online by Cambridge University Press:  20 January 2017

P.W. Birkeland ,
D.T. Rodbell  and
S.K. Short
P.W. Birkeland
Affiliation:
Department of Geological Sciences, University of Colorado, Boulder, Colorado 80309 Department of Anthropology, University of Colorado, Boulder, Colorado 80309
D.T. Rodbell
Affiliation:
Department of Geological Sciences, University of Colorado, Boulder, Colorado 80309 Department of Anthropology, University of Colorado, Boulder, Colorado 80309
S.K. Short
Affiliation:
Department of Anthropology, University of Colorado, Boulder, Colorado 80309 Institute of Arctic and Alpine Research, University of Colorado, Boulder, Colorado 80309
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Abstract

Three radiocarbon dates along with relative-dating criteria place limits on the deglaciation history of Manachaque Valley, Cordillera Central. Ice retreated from the late-glacial maximum by at least 12,100 yr B.P. During ice retreat numerous moraines were deposited throughout the valley. Glacier cover was reduced to about half that of the last glacial maximum by at least 9700 yr B.P. and to less than a tenth by at least 6450 yr B.P. Because all dates are minimum, the dates and field data are consistent with little or no ice remaining by early Holocene. No unambiguous Younger Dryas moraines are present.

Type
Short Paper
Information
Quaternary Research , Volume 32 , Issue 1 , July 1989 , pp. 111 - 113
Copyright
University of Washington

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