Table 1 Summary of core sections from which paleolatitudes were obtained.
Locality name | Latitude (N) | Longitude (E) | Core ID | Depth in core (mbsf) | N | Inc (°) | α95(°) | Plat (°) | Lithology | Age (Ma) |
|---|---|---|---|---|---|---|---|---|---|---|
KP490 Seamount | 29°09.30′ | 133°21.51′ | 07DSKP490BMS01 | 4.30–4.40 | 5 | −44.5 | 3.7 | 26.2 | Calcareous mudstone | NN7-15 (3.6–11.8) (N) |
Hyuga Seamount | 27°59.25′ | 134°45.00′ | 02DA10BMS02 | 7.20–7.29 | 4 | −35.9 | 7.8 | 19.9 | Sandy limestone | NP24 (27.2–30.0) (N) |
11.87–12.00 | 5 | −24.3 | 7.9 | 12.7 | Sandy limestone | NP24 (27.2–30.0) (N) | ||||
Osumi Seamount | 27°13.10′ | 135°06.69′ | 00DA02BMS01 | 0.50–0.60 | 4 | −30.7 | 12.2 | 16.5 | Calcareous sandstone | NP25 (23.3–27.2) (N) |
1.55–1.66 | 4 | 37.5 | 16.3 | 21.0 | Calcareous sandstone | NP25 (23.3–27.2) (N) | ||||
Shinsei Seamount | 24°21.47′ | 136°25.21′ | 03DS076BMS02 | 2.43–2.50, 2.50–2.58 | 9 | 34.6 | 8.5 | 19.0 | Sandy limestone | NP24–25 (23.3–30.0) (N) |
Meisei Seamount | 23°52.15′ | 136°47.51′ | 02DA15LC01* | 0.11–1.80 | 36 | 40.4 | 3.2 | 23.0 | Calcareous silt | NN11–20 (0.3–8.2) (N) |
Hokuto Seamount | 23°50.71′ | 136°29.71′ | 03DS083LC01* | 0.11–1.86 | 22 | 40.0 | 6.1 | 22.8 | Calcareous silt | NN5–6 (11.8–14.9) (N) |
KP357 Seamount | 22°21.35′ | 136°53.18′ | 04DSKP357BMS01 | 3.00–3.12 | 5 | 22.1 | 14.4 | 11.5 | Sandy limestone | NP23 (30.0–32.4) (N) |
22°24.56′ | 136°48.88′ | 04DSKP357BMS02 | 8.75–8.83, 8.85–8.90 | 5 | −34.3 | 19.0 | 18.8 | Tuff | NP23–24 (27.2–32.4) (N) | |
22°22.32′ | 136°51.36′ | 05DSKP357BMS01 | 1.26–1.40 | 5 | 26.2 | 16.3 | 16.3 | Sandy siltstone | NP23 (30.0–32.4) (N) | |
Hazuki Seamount | 21°43.75′ | 135°58.76′ | 04DSKP359BMS01 | 5.25–5.33, 5.45–5.50 | 4 | −15.2 | 7.2 | 7.7 | Sandy siltstone | NP23–24 (27.2–32.4) (N) |
Naze Seamount | 28°03.71′ | 131°27.29′ | 03DS135LC01* | 0.58–0.70 | 5 | 1.6 | 7.4 | 0.8 | Silt | E.-M. Eocene (42.6–52.6) (F) |
Daito 401 Seamount | 26°27.05′ | 131°23.45′ | 07DSDA401BMS02 | 4.00–4.10 | 4 | 17.7 | 15.3 | 9.1 | Limestone | NP16 (39.7–42.5) (N) |
Daito 3316 Seamont | 25°41.35′ | 133°16.26′ | 02DA16BMS01 | 0.20–0.33 | 4 | 2.0 | 23.9 | 1.0 | Limestone | P12–14 (37.9–42.6) (F) |
Oki-Daito 432 Seamount | 22°44.69′ | 134°34.23′ | 04DSOD432BMS01 | 2.02–2.12 | 4 | 5.6 | 11.8 | 2.8 | Limestone | 29.9–33.8 (Sr) |
Basho Seamount | 22°19.82′ | 128°39.44′ | 02DB16BMS02 | 1.99–2.10 | 4 | 15.1 | 5.2 | 7.7 | Limestone | P12–14 (37.9–42.6) (F) |
Iwoto Trough SE | 22°00.23′ | 140°15.17′ | 06DSIB502BMS02 | 6.48–6.60, 6.60–6.71 | 11 | 40.8 | 4.1 | 23.3 | Tuffaceous siltstone | NN9 (9.8–10.6) (N) |
Shichigosan Knoll | 21°31.70′ | 140°58.45′ | 06DSIB504BMS01 | 2.47–2.63 | 7 | −36.1 | 8.8 | 14.5 | Tuffaceous siltstone | NN9 (9.8–10.6) (N) |