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Stage 3
- Type locality: Oshima-Kojima island, Hokkaido
- Volcanic rocks
- Pleistocene
- Lithofacies: Andesite, Dacite, Lava
- Oshima-Kojima volcano
- [ Upper ]
- +__+__+__+__+_
- Stage 3
- --------------
- Stage 2
- --------------
- Stage 1
- ~~~~~~~~~~~~~~
- [ Lower ]
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Oshima-Kojima island, Hokkaido
- Kosugi et al. (2013) Jour. Geol. Soc. Japan, vol.119, no.12, pp.743-758 DOI