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Lower part

• Type locality: Jigoku valley, Kasugano village, Nara city, Nara prefecture
• Volcanic rocks
• Pyroclastic flow deposit
• Miocene

• Lithofacies: Partly welded massive pyroclastic rocks
• Lithofacies: Tuff, Lapilli tuff, Tuff breccia

• Thickness: 40 m
• Upper limit: Unconformity
• Lower limit: Unconformity

------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown

• Distribution: Jigoku valley, Kasugano village, Nara city, Nara pref.; Nakanokawa village, Nara city, Nara pref.; East of Mount Kasuga, Nara city, Nara pref.; West of Fujiwara, Nara city, Nara pref.; West of Suyama, Nara city, Nara pref.; Myoga, Nara city, Nara pref.

• Sato et al. (2015) Jour. Geol. Soc. Japan, vol.121, no.6, pp.173-178, DOI
• Sato et al. (2012) Jour. Geol. Soc. Japan, vol.118, Supplement, pp.53-69 DOI