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Maruyama Andesite Mizuno, 1976

• Volcanic rocks
• Miocene

• Lithofacies (Upper): Olivine augite andesite lava, Tuff breccia
• Lithofacies (Lower): Hypersthene augite andesite lava, Tuff breccia

• Thickness: ca. 200 m

• Distribution: Mount Maruyama - Aoki pass - Sora pass, Chikuhoku city, Higashichikuma county, 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.)