title: Difference in radiocarbon ages of carbonized material from the inner and outer surfaces of pottery from a wetland archaeological site.
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.
authors: Center for Chronological Research (CCR), Nagoya University, Japan. miyata@nendai.nayoya-u.ac.jp
authors: Yoshiki
authors: Y
authors: Miyata
authors: Masayo
authors: M
authors: Minami
authors: Shin
authors: S
authors: Onbe
authors: Minoru
authors: M
authors: Sakamoto
authors: Hiroyuki
authors: H
authors: Matsuzaki
authors: Toshio
authors: T
authors: Nakamura
authors: Mineo
authors: M
authors: Imamura
mesh_terms: D001106:Archaeology; D002138:Calibration; D002244:Carbon / Q000032:analysis*; D002516:Ceramics / Q000737:chemistry*; D005843:Geography; D007564:Japan; D009584:Nitrogen / Q000032:analysis; D055110:Radiometric Dating / Q000379:methods*; D013499:Surface Properties; D013997:Time Factors; D053833:Wetlands; D014934:Wood / Q000737:chemistry
chemical_list: D002244:Carbon; D009584:Nitrogen