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Age constraints on the late Quaternary evolution of Qinghai Lake, Tibetan Plateau

Published online by Cambridge University Press:  20 January 2017

David B. Madsen*
Affiliation:
Texas Archeological Research Laboratory, University of Texas, 1 University Station R7500, Austin, TX 78712, USA
Ma Haizhou
Affiliation:
Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, Qinghai 810008, PR China
David Rhode
Affiliation:
Division of Earth and Ecosystem Sciences, Desert Research Institute, Reno, NV 89512, USA
P. Jeffrey Brantingham
Affiliation:
Department of Anthropology, University of California Los Angeles, Los Angeles, CA 90095, USA
Steven L. Forman
Affiliation:
Department of Earth and Environmental Sciences, University of Illinois at Chicago, Chicago, IL 60607, USA
*
*Corresponding author.E-mail address: madsend@mail.utexas.edu (D.B. Madsen).

Abstract

Dating and geomorphology of shoreline features in the Qinghai Lake basin of northwestern China suggest that, contrary to previous interpretations, the lake likely did not reach levels 66–140 m above modern within the past ∼ 90,000 yr. Maximum highstands of ∼ 20–66 m above modern probably date to Marine Isotope Stage (MIS) 5. MIS 3 highstands are undated and uncertain but may have been at or below post-glacial highs. The lake probably reached ∼ 3202–3206 m (+ 8–12 m) during the early Holocene but stayed below ∼ 3202 m after ∼ 8.4 ka. This shoreline history implies significantly different hydrologic balances in the Qinghai Lake basin before ∼ 90 ka and after ∼ 45 ka, possibly the result of a more expansive Asian monsoon in MIS 5.

Information

Type
Research Article
Copyright
University of Washington

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