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Yoroiiwa Pyroclastic Flow Deposit

• Type locality: Hocchi pass, Kai city - Nirasaki city, Yamanashi prefecture
• Tephra
• early Pleistocene

• Lithofacies: Andesite pyroclastic flow deposit (more than 3 flow units)

• Thickness: 100 m or thicker
• Upper limit: Conformity (Yoroiiwa Lava and Dike)
• Lower limit: Unconformity (Kuroiwa Lava Domes)

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

• Distribution: Hocchi pass, Kai city - Nirasaki city, Yamanashi pref.; Manju pass - Komori, Nirasaki city, Yamanashi pref.

• Mimura et al. (1984) Geology of the Mitake-Shosenkyo District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 61p. (in Japanese with English abstract 4p.)