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Difference in radiocarbon ages of carbonized material from the inner and outer surfaces of pottery from a wetland archaeological site.

Miyata Y, Minami M, Onbe S, Sakamoto M, Matsuzaki H, Nakamura T, Imamura M - Proc. Jpn. Acad., Ser. B, Phys. Biol. Sci. (2011)

Bottom Line: 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.

View Article: PubMed Central - PubMed

Affiliation: Center for Chronological Research (CCR), Nagoya University, Japan. miyata@nendai.nayoya-u.ac.jp

ABSTRACT
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 (14)C 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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Map showing the Irienaiko archaeological site near Lake Biwa in Shiga Prefecture, Japan.
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fig02: Map showing the Irienaiko archaeological site near Lake Biwa in Shiga Prefecture, Japan.

Mentions: The Irienaiko archaeological site (35°18′45″N, 136°16′30″E; Fig. 2) is in the central part of Honshu, the main island of Japan. The site lies on a wetland on the eastern side of Lake Biwa that has been alternately inundated and exposed as the lake has expanded and contracted. The Irienaiko archaeological site was first occupied in the Jomon period, when a dry land surface became available along that part of the lakeshore.


Difference in radiocarbon ages of carbonized material from the inner and outer surfaces of pottery from a wetland archaeological site.

Miyata Y, Minami M, Onbe S, Sakamoto M, Matsuzaki H, Nakamura T, Imamura M - Proc. Jpn. Acad., Ser. B, Phys. Biol. Sci. (2011)

Map showing the Irienaiko archaeological site near Lake Biwa in Shiga Prefecture, Japan.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3313692&req=5

fig02: Map showing the Irienaiko archaeological site near Lake Biwa in Shiga Prefecture, Japan.
Mentions: The Irienaiko archaeological site (35°18′45″N, 136°16′30″E; Fig. 2) is in the central part of Honshu, the main island of Japan. The site lies on a wetland on the eastern side of Lake Biwa that has been alternately inundated and exposed as the lake has expanded and contracted. The Irienaiko archaeological site was first occupied in the Jomon period, when a dry land surface became available along that part of the lakeshore.

Bottom Line: 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.

View Article: PubMed Central - PubMed

Affiliation: Center for Chronological Research (CCR), Nagoya University, Japan. miyata@nendai.nayoya-u.ac.jp

ABSTRACT
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 (14)C 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.

Show MeSH
Related in: MedlinePlus