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Yamaguchi Pumice Tuff

• Type locality: Yamaguchi, Yamanashi city, Yamanashi prefecture
• Volcanic rocks
• Pliocene

• Sedimentary facies: Terrestrial
• Sedimentary facies (Minor): Shallow lacustrine
• Lithofacies: Andesite pumice tuff, Tuff breccia
• Lithofacies (Minor): Volcanic breccia

• Thickness: 200 m or thicker
• Upper limit: Conformity, partly interfingered or transitional (Toiwa Pyroclastic Flow Deposit), Unconformity (Katayama Lava, Kubodaira Mudflow Deposit)
• Lower limit: Unconformity (Higashiyamanashi Volcano-Plutonic Complex, Kofu Granodioritic Complex, Taragatoge Volcanic Rock)

------ Transitional, ~~~~~~ Intrusive, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown

• Distribution: Yamaguchi - Makidair - Kirisashi, Yamanashi city, Yamanashi pref.; Kamezawa river, Kai city, Yamanashi pref.; Iwdo, Koshu 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.)