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New Dates on Late Pleistocene Dacitic Tephra from the Mount Edgecumbe Volcanic Field, Southeastern Alaska

Published online by Cambridge University Press:  20 January 2017

James E. Begét
Affiliation:
Department of Geology and Geophysics, University of Alaska, Fairbanks, Alaska, 99775
Roman J. Motyka
Affiliation:
School of Science, University of Alaska–Southeast, Juneau, Alaska, 99801

Abstract

New radiocarbon dates on charcoal incorporated in proximal airfall deposits indicate the largest late Pleistocene eruption from the Mt. Edgecumbe volcanic field in Southeast Alaska occurred ca. 11,250 ± 50 14C yr B.P. The more precise dating of the principal Edgecumbe tephra layer greatly improves its utility as a tephrochronologic marker horizon in southeastern Alaska.

Type
Short Paper
Copyright
University of Washington

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