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Late Holocene tephrochronology of the northern Antarctic Peninsula

Published online by Cambridge University Press:  20 January 2017

Svante Björck
Affiliation:
Department of Quaternary Geology, Lund University, Tornav. 13, S-223 63 Lund, Sweden
Per Sandgren
Affiliation:
Department of Quaternary Geology, Lund University, Tornav. 13, S-223 63 Lund, Sweden
Rolf Zale
Affiliation:
Department of Geography, University of Umeå, S-901 87 Umeå, Sweden

Abstract

Andesitic and basaltic andesitic tephra layers are abundant in Holocene deposits from the Antarctic Peninsula. Visually discernible tephra horizons occur in three lakes on Livingston Island. Tephra in two other lakes and in a moss bank on Elephant Island, with very low ash concentrations, were detected magnetically. Deception Island is the most likely volcanic source for the tephra. With direct 14C dating, age/depth curves, and cross-correlations at least 14 tephra horizons dating to between ca. 4700 and 250 yr B.P. were identified and now form the basis for a preliminary regional tephrochronology that will be a valuable dating tool for investigating the Holocene climatic history of Antarctica.

Type
Articles
Copyright
University of Washington

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