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Okinazawa Basalt Member

• Type locality: Okinazawa, Nishiwaga city, Waga county, Iwate prefecture
• Volcanic rocks
• Half-graben
• middle Miocene

• Lithofacies: Basalt tuff breccia, Lapilli tuff
• Lithofacies (Minor): Basalt volcanic breccia, Tuff, Sandstone, Mudstone

• Thickness: 0 - 200 m
• Upper limit: Conformity
• Lower limit: Conformity

------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown

• Distribution: Okinazawa, Nishiwaga city, Waga county, Iwate pref.

• Hosoi and Amano (2013) Jour. Geol. Soc. Japan, vol.119, no.9, pp.630-646 DOI
• Ozawa et al. (1971) Geology of the Kawashiri District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 40p. (in Japanese with English abstract 5p.)