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Directly dated MIS 3 Lake-Level Record from Lake Manix, Mojave Desert, California, USA

Published online by Cambridge University Press:  20 January 2017

Marith C. Reheis*
Affiliation:
U.S. Geological Survey, MS-980, Federal Center, Box 25046, Denver CO 80225, USA
David M. Miller
Affiliation:
U.S. Geological Survey, MS-945, 345 Middlefield Rd., Menlo Park, CA 94025, USA
John P. McGeehin
Affiliation:
U.S. Geological Survey, MS-926, National Center, 12201 Sunrise Valley Drive, Reston, VA 20192, USA
Joanna R. Redwine
Affiliation:
U.S. Bureau of Reclamation, MS-86-25007, Federal Center, Box 25046, Denver, CO 80225, USA
Charles G. Oviatt
Affiliation:
Department of Geology, Kansas State University, 108 Thompson Hall, Manhattan, KS 66506-3201, USA
Jordon Bright
Affiliation:
Department of Geosciences, University of Arizona, Tucson, AZ 85721, USA
*
*Corresponding author. Fax: + 1 303 236 5349. E-mail addresses:mreheis@usgs.gov (M.C. Reheis), dmiller@usgs.gov (D.M. Miller), mcgeehin@usgs.gov (J.P. McGeehin), jredwine@usbr.gov (J.R. Redwine), joviatt@k-state.edu (C.G. Oviatt), jbright1@email.arizona.edu (J. Bright).

Abstract

An outcrop-based lake-level curve, constrained by ~ 70 calibrated 14C ages on Anodonta shells, indicates at least 8 highstands between 45 and 25 cal ka BP within 10 m of the 543-m upper threshold of Lake Manix in the Mojave Desert of southern California. Correlations of Manix highstands with ice, marine, and speleothem records suggest that at least the youngest three highstands coincide with Dansgaard–Oeschger (D–O) stadials and Heinrich events 3 and 4. The lake-level record is consistent with results from speleothem studies in the Southwest that indicate cool wet conditions during D–O stadials. Notably, highstands between 43 and 25 ka apparently occurred at times of generally low levels of pluvial lakes farther north as interpreted from core-based proxies. Mojave lakes may have been supported by tropical moisture sources during oxygen-isotope stage 3, perhaps controlled by southerly deflection of Pacific storm tracks due to weakening of the sea-surface temperature gradient in response to North Atlantic climate perturbations.

Information

Type
Research Article
Copyright
University of Washington

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