沖縄県北谷沖の海底構造物の年代測定と与那国海底遺跡年代の再検討(タンデトロン加速器質量分析計業績報告2006(平成18)年度)

DOI 機関リポジトリ 機関リポジトリ (HANDLE) オープンアクセス

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  • ^<14>C Ages of underwater ruins off Chatan and Yonaguni in Okinawa, Japan(Summaries of Research Using AMS)

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説明

Submarine ruins characterized by megalithic constructions at 35m deep appearing large big castles beneath the sea off Chatan in Okinawa. Based on ^<14>C age measurements, the submarine ruins off Chatan is estimated as 2,000-1,000 yr BP (years before present). The carbon age measurements of icicles stones and shell fragments inside of submarine stalactite caves discovered off main island of Okinawa support the existence of a crustal subsidence since 3,000 years ago. On the contrary, ages of artificial constructions off Yonaguni may have been constructed during 3,000-2,000 yr BP on the dry land. As the result, the submarine ruins off Okinawa may have subsided in water by extremely new crustal movement.

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