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Inase Formation Shimakura and Tsuchida, 1939

• Volcanic rocks
• Miocene (15.0, 12.9 Ma, K-Ar)
• Correlation: Ishikoshi Andesite, Nonodake Pyroclastic Member

• Lithofacies: Andesitic agglomerate, Two-pyroxene andesite
• Lithofacies (Minor): Tuff, Tuffaceous sandstone, Conglomerate

• Thickness: 120 m or thicker

• Distribution: Shiratsuchi, Taniuchi, Towa town, Hanamaki city, Iwate pref.

• Takeuchi and Kaneko (1996) Geology of the Shizugawa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 93p. (in Japanese with English abstract 5p.)
• Hirokawa and Yoshida (1954) Hitokabe, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 33p. (in Japanese with English abstract 14p.)