Geological record of prehistoric tsunamis in Mugi town, facing the Nankai Trough, western Japan

Shimada, Yumi; Fujino, Shigehiro; Sawai, Yuki; Tanigawa, Koichiro; Matsumoto, Dan; Momohara, Arata; Saito-Kato, Megumi; Yamada, Masaki; Hirayama, Eri; Suzuki, Takahiro; Chagué, Catherine

doi:10.1186/s40645-019-0279-9

Progress in Earth and Planetary Science

Table 2 Radiocarbon ages from Mugi Town

From: Geological record of prehistoric tsunamis in Mugi town, facing the Nankai Trough, western Japan

No.	Site	Elevation (m, T.P.)	Conventional age (¹⁴C yr BP)	Calibrated age2σ range (cal yr BP)	Material	Lab no. (Beta-)
1	MG01	0.24 to 0.21	1940 ± 30 BP	1970–1820	Needles	465345
2	MG03	0.26 to 0.23	3460 ± 30 BP	3831–3642	Leaf	465341
3	MG03	− 0.03 to − 0.06	3760 ± 30 BP	4237–3994	Needles, Leaves, and Najas spp. & unidentified taxa	483201
4	MG03	− 2.63 to − 2.66	6000 ± 30 BP	6931–6750	Ruppia maritima	465342
5	MG05	1.65 to 1.64	1660 ± 30 BP	1690–1421	Cladium chinense	473445
6	MG05	1.24 to 1.21	2340 ± 30 BP	2457–2316	Seeds	503500
7	MG05	1.15 to 1.14	2740 ± 30 BP	2920–2765	Cladium chinense	473446
8	MG05	0.64 to 0.63	3340 ± 30 BP	3678–3480	Cladium chinense	474818
9	MG05	− 0.15 to − 0.16	3680 ± 30 BP	4139–3914	Leaves	474369
10	MG05	− 0.68 to − 0.69	4030 ± 30 BP	4572–4422	Needles	473447
11	MG05	− 0.72 to − 0.73	4380 ± 30 BP	5040–4863	Najas spp.	474796
12	MG05	− 0.86 to − 0.87	4170 ± 30 BP	4831–4585	Leaves	473449
13	MG05	− 0.92 to − 0.93	4260 ± 30 BP	4870–4711	Leaf	474370
14	MG05	− 1.28 to − 1.29	4750 ± 30 BP	5586–5331	Zannichellia palustris	473450
15	MG05	− 1.79 to − 1.80	4780 ± 30 BP	5590–5468	Ruppia maritima and Zannichellia palustris	473451
16	MG06	0.99 to 0.97	2890 ± 30 BP	3145–2928	Cladium chinense	481643
17	MG06	− 0.83 to − 0.89	4140 ± 30 BP	4824–4571	Moss stems, Najas spp., Zannichellia palustris and un identified taxa	483425
18	MG06	− 1.76 to − 1.79	4470 ± 30 BP	5289–4976	Zannichellia palustris	482828
19	MG06	− 2.88 to − 2.91	5450 ± 30 BP	6301–6205	Najas spp., Zannichellia palustris and unidentified taxa	483202
20	MG08	1.06 to 1.03	2610 ± 30 BP	2776–2721	Cladium chinense	465343
21	MG08	− 0.64 to − 0.67	4020 ± 50 BP	4570–4421	Leaf	465344
22	MG08	− 2.00 to − 2.03	4740 ± 50 BP	5589–5326	Najas spp., Ruppia maritima,Zannichellia palustris and unidentified taxa	483,427
23	MG10	1.48 to 1.46	2280 ± 30 BP	2353–2161	Needles	503498
24	MG10	1.29 to 1.27	2870 ± 30 BP	3077–2881	Cladium chinense	503499
25	MG10	− 0.39 to − 0.42	3570 ± 30 BP	3972–3731	Cladium chinense	483203
26	MG10	− 0.75 to − 0.78	5010 ± 30 BP	5892–5656	Leaves, Najas spp. and unidentified taxa	483426
27	MG10	− 0.66 to − 0.69	5780 ± 30 BP	6657–6500	Zannichellia palustrisRuppia maritima,and unidentified taxa	483204
28	MG13	0.99 to 0.97	2720 ± 30 BP	2868–2761	Cladium chinense	481644
29	MG13	− 2.68 to − 2.71	4890 ± 30 BP	5662–5587	Najas spp., Zannichellia palustris and unidentified taxa	482824

Ages were calibrated with OxCal version 4.3 (Bronk Ramsey 2017) and ranges at two standard deviations were computed with the calibration data of IntCal13 (Reimer et al. 2013)

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