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Aseishigawa Basalt Muraoka and Hase, 1990

• Type locality: Aseishi river, Itadome, Kuroishi city, Aomori prefecture
• Volcanic rocks
• Miocene
• Intruded in: Nashikizawa Tuff Member, Lower Member of Itadome Formation
• Correlation: Arakawa Dolerite

• Sedimentary facies: Sills, Dykes
• Lithofacies: Dolerite (3 sheets), Basalt

• Thickness (A sheet): 50 m or thicker, ca. 175 m
• Upper limit: Unconformity (Obirakiyama Pyroclastic Flow Deposit)

• Distribution: Aseishi river, Itadome, Kuroishi city, Aomori pref.; Motonagamine - Origami creek, Owani city, Minamitsugaru county, Aomori pref.

• Muraoka and Hase (1990) Geology of the Kuroishi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 124p. (in Japanese with English abstract 8p.)