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Omoriyama Andesite Sakamoto et al., 1955

• Volcanic rocks
• Miocene
• Correlation: Himegatake Andesite

• Lithofacies: Andesite

• Upper limit: Unconformity? (Funakawa Formation)

• Distribution: Yonaizawa region, Akita pref.

• Kano et al. (2012) Geology of the Aniai District, 2nd Edition, 1:50,000 Quadrangle Series, Geological Survey of Japan, AIST, 59p. (in Japanese with English abstract 4p.)