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Toiwa Pyroclastic Flow Deposit
- Type locality: north of Akashiba, Makioka town, Yamanashi city, Yamanashi prefecture
- Type locality (Old): Toiwa, Kofu city, Yamanashi prefecture
- Volcanic rocks
- Pliocene
- Intruded by: Katayama Lava
- Sedimentary facies: Terrestrial
- Lithofacies: Pyroclastic flow deposit
- Lithofacies: Hypersthene augite andesite scoria tuff (A few flow units)
- Sedimentary structures: Reversed graded bedding
------ Transitional, ~~~~~~ Intrusive, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Akashiba - Shiodaira - Sakura pass - Hayabusa, Makioka town, Yamanashi city, Yamanashi pref.; Mizugamori, Yamanashi city - Kofu city, Yamanashi pref.; Toiwa, Kofu 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.)