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Table 4 Radiocarbon ages and calibrated ages

From: Historical and paleo-tsunami deposits during the last 4000 years and their correlations with historical tsunami events in Koyadori on the Sanriku Coast, northeastern Japan

Sample no. Sample name Labo no. Sample position Grid no. Depth [m] Material δ13C [‰] Conventional 14C age [yrBP] Calibrated age (2σ) [calBP]
1 KYD-TrS-1 IAAA-131322 Above E2 S-1.95 0.27 Plant −25.3 110 ± 20 270–210 (27.4 %), 150–20 (67.9 %)
2 KYD-TrS-2 IAAA-131323 Below E2 S-1.95 0.31–0.33 Plant −26.7 190 ± 20 290–260 (19.6 %), 220–140 (52.9 %), 20– (22.9 %)
3 KYD-TrS-3 Beta-357404 Above E3 S-1.95 0.43 Plant −28.8 340 ± 30 490–310 (95.4 %)
4 KYD-TrE-1 IAAA-131320 Above E4 E-11.75 0.60–0.62 Plant −28.0 790 ± 20 740–670 (95.4 %)
5 KYD-TrE-2 IAAA-131321 Below E4 E-11.75 0.74–0.76 Organic sediment −25.8 1420 ± 20 1350–1290 (95.4 %)
6 KYD-TrE-3 Beta-341796 Below E7 E-11.75 1.23–1.24 Plant −24.8 1570 ± 30 1540–1390 (95.4 %)
7 KYD-TrE-4 Beta-341572 Above E8 E-11.75 1.31–1.32 Plant −25.1 2320 ± 30 2380–2300 (90.1 %), 2240–2180 (5.3 %)
8 KYD-TrE-5 Beta-341797 Below E8 E-11.75 1.35–1.36 Plant −26.8 2360 ± 30 2490–2330 (95.4 %)
9 KYD-TrW-1 IAAA-131324 Above E3 W-2.75 0.27–0.29 Plant −25.5 150 ± 20 290–250 (15.7 %), 230–130 (48.1 %), 120–70 (13.1 %), 40–0 (18.5 %)
10 KYD-TrW-2 Beta-339851 Below E3 W-2.75 0.39–0.41 Plant −27.7 370 ± 30 510–420 (55.0 %), 400–310 (40.4 %)
11 KYD-TrW-3 Beta-339855 Above E4 W-2.75 0.84–0.86 Plant −29.1 1090 ± 30 1060–930 (95.4 %)
12 KYD-TrW-4 Beta-339856 Below E4 W-2.75 0.94–0.96 Plant −25.7 990 ± 30 970–890 (57.4 %), 880–790 (38.0 %)
13 KYD-TrW-5 Beta-339857 Above E5 W-2.75 1.10–1.12 Plant −26.8 1030 ± 30 1050–1030 (2.8 %), 990–900 (91.9 %), 850–830 (0.7 %)
14 KYD-TrW-6 Beta-341794 Below E5 W-2.75 1.19–1.21 Plant −26.3 700 ± 30 690–640 (77.5 %), 590–560 (17.9 %)
15 KYD-TrW-7 Beta-339858 Above E6 W-2.75 1.30–1.31 Plant −26.1 1100 ± 30 1070–930 (95.4 %)
16 KYD-TrW-8 Beta-341795 Below E6 W-2.75 1.39–1.40 Plant −26.4 1420 ± 30 1370–1280 (95.4 %)
17 KYD-TrW-9 Beta-339859 Above E7 W-2.75 1.45–1.46 Plant −27.6 1680 ± 30 1700–1650 (10.2 %), 1630–1520 (85.2 %)
18 KYD-TrW-10 Beta-339861 Above E9 W-2.75 1.66–1.67 Plant −26.9 2410 ± 30 2690–2630 (11.2 %), 2620–2590 (2.9 %), 2500–2340 (81.3 %)
19 KYD-TrW-11 Beta-341798 Below E9 W-2.75 1.73–1.74 Plant −24.5 2530 ± 30 2750–2680 (35.8 %), 2640–2490 (59.6 %)
20 KYD-TrW-12 Beta-339862 Above E10 W-2.75 1.87–1.88 Plant −27.2 2810 ± 30 3000–2840 (95.4 %)
21 KYD-TrW-13 Beta-340343 Above E10 W-2.75 1.87–1.88 Charcoal −25.4 3500 ± 30 3860–3690 (95.4 %)
22 KYD-TrW-14 Beta-341799 Below E10 W-2.75 1.92–1.93 Plant −28.0 2780 ± 30 2960–2790 (95.4 %)
23 KYD-TrW-15 Beta-339863 Above E11 W-2.75 2.16–2.17 Plant −26.1 2870 ± 30 3080–2880 (95.4 %)
24 KYD-TrW-16 IAAA-131669 Above E11 W-2.75 2.16–2.17 Organic sediment −23.5 3500 ± 30 3860–3690 (95.4 %)
25 KYD-TrW-17 Beta-341800 Below E11 W-2.75 2.25–2.26 Plant −25.8 3020 ± 30 3340–3140 (92.0 %), 3130–3110 (1.4 %), 3100–3080 (2.0 %)
26 KYD-Tr-a Beta-357405 Below E3 E-2.40-2.60 0.50–0.70 Plant −28.2 500 ± 30 620–610 (0.7 %), 560–500 (94.7 %)
27 KYD-Tr-b Beta-339852 Channel 1 E-6.00 0.68–0.70 Plant −27.0 1190 ± 30 1230–1210 (2.9 %), 1190–1050 (89.0 %), 1030–1000 (3.5 %)
28 KYD-Tr-c Beta-339853 Channel 1 E-7.30 0.95 Seed (Juglans sp.) −25.3 1240 ± 30 1270–1070 (95.4 %)
29 KYD-Tr-d Beta-357406 Channel 1 E-6.00 0.94–0.99 Plant −28.9 1090 ± 30 1060–930 (95.4 %)
30 KYD-Tr-e Beta-339854 Channel 2 E-8.45 1.30 Plant −25.1 1040 ± 30 1050–1020 (5.2 %), 1000–910 (90.2 %)