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Kayanotaira Pyroclastic Flow Deposit Akahane, 1977

• Type locality: Mansui river, Kayanotaira, Kijimadaira city, Shimotakai county, Nagano prefecture
• Tephra
• Pleistocene (1.53 Ma, K-Ar)

• Lithofacies: Hornblende hypersthene augite dacite pyroclastic flow deposit

• Thickness: 200 - 250 m
• Upper limit: Unconformity (Takappyoyama Lava, Okushiga Lake Deposit)
• Lower limit: Unconformity (Ketto Formation, Shiga Green Volcanic Rocks, Takai Volcanic Rocks, Hirao Volcanic Rocks)

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

• Distribution: Kayanotaira - Kobanosawa creek, Kijimadaira city, Shimotakai county, Nagano pref.
• Fossils: Wood fragments

• Shimazu and Tateishi (1993) Geology of the Naebasan District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 90p. (in Japanese with English abstract 5p.)
• Akahane et al. (1992) Geology of the Nakano District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 106p. (in Japanese with English abstract 4p.)