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Sadoyama Volcanic Rocks Hayatsu, 1985

• Type locality: Mount Sadoyama, Nagano city, Nagano prefecture
• Volcanic rocks
• Stratovolcano
• Pleistocene (0.25 Ma, K-Ar)

• Lithofacies: Lava, Pyroclastic flow deposit, Pumice fall deposit, Debris avalanche deposit
• Lithofacies: Hornblende-bearing andesite, Dacite

• Thickness: 20 m or thicker
• Upper limit: Unconformity (Yamakuwayama Lava)

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

• Distribution: Mount Sadoyama, Nagano city, Nagano pref.; Seki river, Shinano city, Kamiminochi county, Nagnao pref.

• Nagamori et al. (2003) Geology of the Togakushi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 109p. (in Japanese with English abstract 3p.)