14C Ages and Calibrated Dates of the Oldest Pottery Culture in the Chojakubo-Mikoshiba Period.

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  • 長者久保・神子柴文化期における土器出現の`14´C年代・較正暦年代
  • チョウジャ クボ ミコ シバ ブンカキ ニ オケル ドキ シュツゲン ノ 14C ネンダイ ナンセイ レキネンダイ

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Abstract

The Odaiyamamoto I site, which is located in Aomori Prefecture, is one of several sites where the oldest type of pottery in the Japanese archipelago has been found. The site belongs to the Chojakubo-Mikoshiba culture period. Charred residues, which are presumably some food burned in cooking, were sampled from the surface for radiocarbon dating using AMS. The result of the dating indicated ages of 12, 680±140 to 13, 780±170yrs BP. The dates of the Odaiyamamoto I sample seem to be consistent with those of the Towada-Hachinohe Tephra (12, 380±110 to 13, 080±60yrs BP), because the Towada-Hachinohe Tephra was preceded by the Chojakubo-Mikoshiba culture. The calibrated ages using INTCAL98 are 15, 320-16, 540 cal BP, indicating that the oldest pottery appeared during the last glacial period instead of the post-glacial period as we anticipated. Thus, reconsideration is necessary for our pottery chronology, which includes the Chojakubo-Mikoshiba culture period in the Incipient Jomon Period.

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