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Kamuriki Formation Kato, 1980

• Type locality: Mount Kamuriki - Ipponmatsu pass, Chikuma city - Chikuhoku city, Higashichikuma county, Nagano prefecture
• Volcanic rocks
• Miocene

• Lithofacies: Andesite tuff breccia
• Lithofacies (Minor): Volcanic breccia, Andesite lava, Tuff, Dacite

• Thickness: ca. 100 m or thicker
• Upper limit: Unconformity (Mitsumineyama Volcanics, Hijiriyama Volcanics)
• Lower limit: Unconformity (Susobana Formation)

• Distribution: Mount Kamuriki, Chikuma city, Nagano pref.

• Kato (1980) Geology of the Sakaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 57p. (in Japanese with English abstract 5p.)