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Pyroclastic Rock 1
- Volcanic rocks
- late Miocene
- Intruded by: Trachyte sill (Columnar joint)
- Contemporaneous heterotopic facies: Mimizaki Trachyte
- Sedimentary facies (Upper): Pyroclastic fall deposits near the source by cyclical eruption
- Sedimentary facies (Upper): Spatter
- Sedimentary facies (Lower): Pyroclastic surge
- Lithofacies (Upper): Welded trachytic lapilli tuff
- Lithofacies (Lower): Non-welded trachytic lapilli tuff
- Sedimentary structures (Lower): Graded bedding, Parallel stratification, Cross stratification
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Shinfukuura tunnel - Kurotakiiwa, Okinoshima city, Oki county, Shimane pref.
- Yamauchi et al. (2009) Geology of the Saigo District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 118p. (in Japanese with English abstract 3p.)