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Bosawa Andesite Ozawa et al., 1979

• Type locality: Bosawa, Otsubechi, Yuzawa city, Akita prefecture
• Volcanic rocks
• Miocene

• Lithofacies: Hypersthene augite andesite lava
• Lithofacies (Minor): Tuff breccia, Volcanic breccia

• Thickness: 100 - 200 m
• Lower limit: Unconformity (Sanzugawa Formation)

• Distribution: Bosawa, Otsubechi, Yuzawa city, Akita pref.

• Ozawa et al. (1979) Geology of the Yuzawa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 64p. (in Japanese with English abstract 4p.)