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Table 2 Radiocarbon ages of bioclasts collected from the trench wall

From: Millennial paleotsunami history at Minna Island, southern Ryukyu Islands, Japan

  Sample Beta ID Conventional radiocarbon age (years BP) Calibrated age (cal years AD (2σ)) Median (cal years AD) d13C (‰)
Layer 4 Acropora sp. 1 541257 1380 ± 30 787–1170 982 0.68
Acropora sp. 2 541258 1920 ± 30 244–632 439 1.61
Layer 2 Atactodea striata 481330 1260 ± 30 947–1281 1112 1.9
Palauastrea ramosa 481331 1170 ± 30 1028–1327 1190 − 0.5