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West-Iwate volcano Sakurai, 1903

Invalid synonym: Old Iwate volcano

• Type locality: Hachimandaira city - Takizawa city - Shizukuishi city, Iwate prefecture
• Volcanic rocks
• Caldera volcano
• Pleistocene - Holocene (0.3 - 0.0 Ma)

• Lithofacies: Tholeiite
• Lithofacies: Basalt - Basaltic andesite
• Lithofacies: Calc-alkaline andesite

• Distribution (Caldera, South-North): ca. 3 km
• Distribution (Caldera, East-West): ca. 1.5 km
• Upper limit: Unconformity (East-Iwate volcano)

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

• Distribution: Hachimandaira city - Takizawa city - Shizukuishi city, Iwate pref.

• Itoh et al. (2018) Jour. Geol. Soc. Japan, vol.124, no.4, pp.271-296 DOI
• Suto and Ishii (1987) Geology of the Shizukuishi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 142p. (in Japanese with English abstract 5p.)
• Kawano and Uemura (1964) Hachimantai, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 36p. (in Japanese with English abstract 8p.)