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Kosha volcano

Synonym: Kosha Volcanic Rocks

• Type locality: Mount Kosha, Nakano city - Yamanouchi city - Kjimadaira city, Shimoakai county, Nagano prefecture
• Volcanic rocks
• Pleistocene (ca. 0.3 - 0.2 Ma, K-Ar)

• Lithofacies:

• Distribution (Diameter): ca. 6 km
• Distribution (Height): ca. 1,000 m
• Upper limit: Unconformity (MK- SY Scoria, Ochiai Lake Deposit)
• Lower limit: Unconformity (Kokuzo Volcanic Rocks, Takinosawa Volcanic Rocks)

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

• Distribution: Mount Kosha, Nakano city - Yamanouchi city - Kjimadaira city, Shimoakai county, Nagano, Nagano pref.

• 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.)