Journal
PROCEEDINGS OF THE JAPAN ACADEMY SERIES B-PHYSICAL AND BIOLOGICAL SCIENCES
Volume 87, Issue 8, Pages 518-528Publisher
JAPAN ACAD
DOI: 10.2183/pjab.87.518
Keywords
radiocarbon dating; carbonized material adhering to pottery; freshwater reservoir effect; diagenesis; wetland archaeological site
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Funding
- Japan Society for the Promotion of Science [18700679, 20700663, 16GS0118]
- Grants-in-Aid for Scientific Research [18700679, 20700663, 16GS0118] Funding Source: KAKEN
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AMS (Accelerator Mass Spectrometry) radiocarbon dates for eight potsherds from a single piece of pottery from a wetland archaeological site indicated that charred material from the inner pottery surfaces (5052 +/- 12 BP; N = 5) is about 90 C-14 years older than that from the outer surfaces (4961 +/- 22 BP; N = 7). We considered three possible causes of this difference: the old wood effect, reservoir effects, and diagenesis. We concluded that differences in the radiocarbon ages between materials from the inner and outer surfaces of the same pot were caused either by the freshwater reservoir effect or by diagenesis. Moreover, we found that the radiocarbon ages of carbonized material on outer surfaces (soot) of pottery from other wetland archaeological sites were the same as the ages of material on inner surfaces (charred food) of the same pot within error, suggesting absence of freshwater reservoir effect or diagenesis.
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