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Kobozaka Pyroclastic Rocks

• Type locality: Kobozaka, Takane town, Hokuto city, Yamanashi prefecture
• Volcanic rocks
• Pleistocene

• Lithofacies: Volcanic breccia, Volcanic sands and gravels
• Lithofacies (Minor): Mudflow deposit

• Thickness: 50 m or thicker
• Upper limit: Unconformity (Kobuchizawa Formation, Kawamata Lava)
• Lower limit: Unconformity (Hinoharu Formation, Nirasaki Debris Avalanche Deposit, Meshimoriyama Volcanics)

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

• Distribution: Kobozaka - Kawamata river - Tonenba, Takane town, Hokuto city, Yamanashi pref.; Hinoharu, Nagasaka town, Hokuto city, Yamanashi pref.

• Kawachi (1977) Geology of the Yatsugatake District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 92p. (in Japanese with English abstract 4p.)