Clarifying the age of initial settlement horizon in the Mariana Islands and the impact of hard water: a response to Carson (2020)

Petchey, Fiona, and Clark, Geoffrey (2021) Clarifying the age of initial settlement horizon in the Mariana Islands and the impact of hard water: a response to Carson (2020). Radiocarbon, 63 (3). pp. 905-913.

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View at Publisher Website: https://doi.org/10.1017/RDC.2021.27
 
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Abstract

This paper is a response to criticism by Carson (2020) concerning the age of the Unai Bapot archaeological site in the Mariana Islands. Of specific contention are supposed errors in the marine radiocarbon (14C) research reported by Petchey et al. (2017). According to Carson, this work produced marine reservoir offsets (ΔR) of “suspiciously wide variance from each other … and those results were incompatible with the site’s reported stratigraphy and dating (Carson 2008) as well as with other previously calculated marine reservoir corrections in the Mariana Islands (Carson 2010: 3).” This statement is misleading on all three points. Our reply discusses the problems encountered when dating shells from near-shore “marine” environments where terrestrial input, in particular hard water, may complicate date interpretation. We outline a cautionary tale relevant to any researcher using “marine” shell dates to develop regional archaeological chronologies in regions dominated by limestone.

Item ID: 70342
Item Type: Article (Short Note)
ISSN: 1945-5755
Keywords: hard water effect, Mariana Islands, marine reservoir effect
Copyright Information: © The Author(s), 2021. Published by Cambridge University Press for the Arizona Board of Regents on behalf of the University of Arizona
Date Deposited: 26 May 2022 00:42
Downloads: Total: 5
Last 12 Months: 1
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