Fig. 3

Correlation of upper Cenozoic successions. Upper Cenozoic successions on and around the Miyako Islands, on the OMSP, and on Okinawa Jima, together with their correlations and ages. Paleobathymetric changes and tectonic movements of southern Okinawa Jima are also shown. Upper Pleistocene and Holocene deposits are not illustrated. Data: Miyako Jima, Sato et al. (2002), Hanagata and Nobuhara (2015); MITI Miyakojima-Oki well, Tsuburaya and Sato (1985); Offshore Okinawa 1 − X well, Aiba and Sekiya (1979), Sato et al. (2022); Okinawa Jima, Tanaka and Ujiié (1984), Hanagata (2004), Sato et al. (2004), Odawara et al. (2005b), Chiyonobu et al. (2009), Fujita et al. (2011), Imai et al. (2017). Biozones: a CN zones, calcareous nannofossil zones of Okada and Bukry (1980); b PL zones, planktic foraminiferal zones of Berggren et al. (1995); c N zones: standard tropical–subtropical planktic foraminiferal zones of Blow (1969). Paleobathymetry: 1, Mollusks, Ogasawara and Masuda (1983); 2, Mollusks, Noda 1980, 1988; 3, Ostracods (Nohara 1987); 4, Benthic foraminifers (Nakagawa et al. 2001); 5, Benthic foraminifers (Matsumoto et al. in press). Note that the vertical lengths of the bars for biozones do not denote actual chronological ranges. *sublittoral; **upper shelf slope (100–300 m water depth); ***upper continental slope (< 500 water depth); ****lower continental slope (500–1500 water depth). Tectonic movement: Faulting 1, formation of normal faults cutting the Shimajiri Group; Faulting 2, formation of faults cutting the Shimajiri Group and the main body of the Ryukyu Group