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Rhyolitic tuff Imaoka et al., 2019
- Type locality: Shiroyama, Isa town, Mine city, Yamaguchi prefecture
- Caldera fill deposit
- Volcanic rocks
- Late Cretaceous
- Lithofacies: Rhyolitic crystalline tuff
- Shiroyama Rhyolitic Pyroclastic Rock Member
- [ Upper ]
- '''''''/,,,,,,
- Rhyodacitic lapilli tuff
- '''''''/,,,,,,
- Rhyodacitic welded tuff
- '''''''/,,,,,,
- Rhyolitic lapilli tuff
- '''''''/,,,,,,
- Rhyolitic tuff
- '''''''/,,,,,,
- [ Lower ]
- Zenjojiyama Formation (Kibe caldera)
- [ Upper ]
- ~~~~~~~~~~~~~~
- Sakurayama Intrusive Breccia
- ~~~~~~~~~~~~~~
- Shiinokibata Breccia Member
- '''''''/,,,,,,
- Inugasako Breccia Member
- '''''''/,,,,,,
- Shiroyama Rhyolitic Pyroclastic Rock Member
- '''''''/,,,,,,
- Ushiroyama Andesite Member
- ~~~~~~~~~~~~~~
- [ Lower ]
- Zenjojiyama Formation
- [ East ]
- ::::::::::::::
- Taikazan body
- ::::::::::::::
- Hirano body
- ::::::::::::::
- Zenjojiyama body
- ::::::::::::::
- Kibe body
- ::::::::::::::
- [ West ]
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Shiroyama - Sugitani, Isa town, Mine city, Yamaguchi pref.; Yoshinori, Omine town, Mine city, Yamaguchi pref.
- Imaoka et al. (2019) Jour. Geol. Soc. Japan, vol.125, no.7, pp.529-553 DOI