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Paleomagnetic Investigation of Lake Lahontan Sediments and Its Application for Dating Pluvial Events in the Northwestern Great Basin

Published online by Cambridge University Press:  20 January 2017

Joseph C. Liddicoat
Affiliation:
Department of Environmental Science, Barnard College, Columbia University, New York, New York, 10027
Robert S. Coe
Affiliation:
Earth Sciences Department, University of California, Santa Cruz, Santa Cruz, California, 95064

Abstract

A comparison of paleomagnetic secular variation in sediment of Pleistocene Lake Lahontan in the northwestern Great Basin with secular variation in lake sediment in the Mono Basin, California, indicates that Lake Lahontan was in the valley of the Truckee River between Pyramid Lake and Wadsworth, Nevada, from about 19,000 to 13,000 yr B.P. The secular variation in older Lake Lahontan sediment in the Truckee River valley has the general features of secular variation in middle Pleistocene lacustrine sediments near Rye Patch Dam, Nevada, 125 km to the east. On the basis of field mapping and tephrochronology, the sections of older lacustrine sediments are not coeval. The apparent, but erroneous, correlation of those sediments emphasizes the need for multiple dating methods when paleomagnetic secular variation is used to date stratigraphy.

Information

Type
Research Article
Copyright
University of Washington

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