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Sorigasezawa Andesite Muraoka and Takakura, 1988

• Type locality: Sorigase creek, Ose river, Towada city, Aomori prefecture
• Volcanic rocks
• Miocene
• Intruded in: Nijikai Tuff

• Lithofacies: Quartz augite hypersthene andesite

• Upper limit: Unconformity (Hakkoda 1st-stage Pyroclastic Flow Deposit)

• Distribution: Sorigase creek, Ose river, Towada city, Aomori pref.

• Takarada and Muraoka (2004) Geology of the Hakkoda San District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 86p. (in Japanese with English abstract 4p.)