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