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Toki Sand and Gravel Formation
- Coherent formation
- Fluvio-lacustrine basin including Lake Tokai
- Pliocene (ca. 11 - 2 Ma)
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Mizunami city - Nakatsugawa city, Gifu pref.
- Tephra: Nakatsugawa I&II Tuff Bed (= Ohta Tephra)
- Ueki et al. (2019) Jour. Geol. Soc. Japan, vol.125, no.3, pp.227-236 DOI
- Hatano and Yoshida (2018) Jour. Geol. Soc. Japan, vol.124, no.3, pp.191-205 DOI
- Sasao et al. (2011) Jour. Geol. Soc. Japan, vol.117, no.8, pp.476-481 DOI