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Radiocarbon ages of charcoal and shell samples excavated at Horiuchi site were measured by AMS. The site consists of two areas : a graveyard and a shell mound. The group of pottery excavated from the site, Sakurai type, indicated that the graveyard had been used mainly in the final stage of Jomon period. The fragments of Sakurai type pottery were also excavated from the shell mound ; accordingly, the shell mound was formed in the same period when the graveyard was used. The radiocarbon ages of charcoal samples excavated from the graves dug in Sakurai period were from 2650 to 2950BP. Although the shell samples have older radiocarbon ages than the charcoal samples, the age gap is due to the reservoir effect. The gap was corrected by a set of radiocarbon ages measured on charcoal and shell excavated from the same layer of the mound. The corrected radiocarbon ages of the shell samples supported that the radiocarbon age when the graveyard and the shell mound were formed is from 2650 to 2950BP.

タンデトロン加速器質量分析計業績報告 Summaries of Researches Using AMS 2001 (平成13)年度



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