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Upper part

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

• Sedimentary facies: Reworked pyroclastic deposit
• Lithofacies (Main): Tuff
• Lithofacies (Minor): Tuffaceous sandstone, Tuffaceous mudstone
• Sedimentary structures: Paralle stratification, Cross-stratification, Graded bedding

• Thickness: 7 - 13 m
• Upper limit: Conformity
• Lower limit: Unconformity

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

• Distribution: North and South of Mount Mikasa, Nara city, Nara pref.; East foot, Mount Kasuga, 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