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AMS Radiocarbon Dates on Peat Section Related with Tephra and Archaeological Sites in Carlisle Island, the Islands of Four Mountains, Alaska

Published online by Cambridge University Press:  28 December 2017

Mitsuru Okuno ,
Pavel Izbekov ,
Kirsten P Nicolaysen ,
Eiichi Sato ,
Toshio Nakamura ,
Arkady B Savinetsky ,
Dmitrii Vasyukov ,
Olga A Krylovich ,
Bulat Khasanov  and
Jonathan Miranda
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Mitsuru Okuno*
Affiliation:
Department of Earth System Science, Faculty of Science, Fukuoka University, Fukuoka 814-0180, Japan
Pavel Izbekov
Affiliation:
Geophysical Institute, University of Alaska-Fairbanks, PO Box 757320, Fairbanks, AK 99775, USA
Kirsten P Nicolaysen
Affiliation:
Department of Geology, Whitman College, 345 Boyer Ave., Walla Walla, WA 99362, USA
Eiichi Sato
Affiliation:
Institute for Promotion of Higher Education, Kobe University, Kobe 657-8501, Japan
Toshio Nakamura
Affiliation:
Division for Chronological Research, Institute for Space-Earth Environmental Research, Nagoya University, Nagoya 464-8601, Japan
Arkady B Savinetsky
Affiliation:
Laboratory of Historical Ecology, Russian Academy of Sciences, Severtsov Institute of Ecology and Evolution, Leninsky pr 33, 119071, Russia
Dmitrii Vasyukov
Affiliation:
Laboratory of Historical Ecology, Russian Academy of Sciences, Severtsov Institute of Ecology and Evolution, Leninsky pr 33, 119071, Russia
Olga A Krylovich
Affiliation:
Laboratory of Historical Ecology, Russian Academy of Sciences, Severtsov Institute of Ecology and Evolution, Leninsky pr 33, 119071, Russia
Bulat Khasanov
Affiliation:
Laboratory of Historical Ecology, Russian Academy of Sciences, Severtsov Institute of Ecology and Evolution, Leninsky pr 33, 119071, Russia
Jonathan Miranda
Affiliation:
Department of Geology, Whitman College, 345 Boyer Ave., Walla Walla, WA 99362, USA
Lyman Persico
Affiliation:
Department of Geology, Whitman College, 345 Boyer Ave., Walla Walla, WA 99362, USA
Virginia Hatfield
Affiliation:
Museum of the Aleutians, 314 Salmon Way, PO Box 648, Unalaska, AK 99685, USA
Dixie L West
Affiliation:
Biodiversity Institute, University of Kansas, Lawrence, KS 66045, USA
Kale M Bruner
Affiliation:
Biodiversity Institute, University of Kansas, Lawrence, KS 66045, USA
*
*Corresponding author. Email: okuno@fukuoka-u.ac.jp
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Abstract

We obtained radiocarbon (14C) dates with accelerator mass spectrometry (AMS) of vascular plant samples and a charcoal sample collected from peat deposits near the prehistoric village site informally designated CR-03 on Carlisle Island in the Islands of Four Mountains group, Alaska, to determine the eruption age of the CR-02 tephra. A fine vitric ash erupted from Okmok caldera, Umnak Island (ca. 2 ka BP) was also discovered in the bog. The ages of the CR-02 tephra and Okmok II ash are estimated to be 1050 and 2000 cal BP, respectively. Because both tephras are distinctive and widespread, these are important chronostratigraphic markers for archaeological sites in this island group. The 14C dates obtained from this bog are 800 years younger than the dates of the charcoal fragments from cultural layers in the Unit 3 of prehistoric village site CR-02 (AMK-0003).

Keywords

AMS radiocarbon datingarchaeological siteCarlisle Islandpost-depositional disturbancetephra and peat layers
Type
Applications
Information
Radiocarbon , Volume 59 , Special Issue 6: 8th International Symposium, Edinburgh, 27 June – 1 July, 2016 Part 2 of 2 , December 2017 , pp. 1771 - 1778
Copyright
© 2017 by the Arizona Board of Regents on behalf of the University of Arizona 

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Footnotes

Selected Papers from the 8th Radiocarbon & Archaeology Symposium, Edinburgh, UK, 27 June–1 July 2016.

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