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Hiratani Intrusive Breccia Imaoka et al., 2019
- Volcanic rocks
- Graben-form caldera?
- Late Cretaceous
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Yamaguchi pref.
- Aiyama and Kanaori (2019) Jour. Geol. Soc. Japan, vol.125, no.7, pp.555-570 DOI
- Imaoka et al. (2019) Jour. Geol. Soc. Japan, vol.125, no.7, pp.529-553 DOI