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Aobasan Andesites

• Volcanic rocks
• Pliocene - Pleistocene

• Lithofacies (Upper): Olivine-bearing augite hypersthene andesite tuff breccia
• Lithofacies (Upper, Minor): Andesite lava
• Lithofacies (Lower): Tuff breccia

• Lower limit: Unconformity (Uchiura Group, Nabae Group, Yakuno Complex, Biotite rhyolite)

• Distribution: Mount Aobasan - Nashima island - Nabae - Konoura - Takaya - Kowada, Takahama city, Oi county, Fukui pref.

• Igi et al. (1961) Maizuru, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 49p. (in Japanese with English abstract 9p.)
• Hirokawa et al. (1958) Obama, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 31p. (in Japanese with English abstract 8p.)
• Hirokawa and Kuroda (1958) Tangoyura, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 23p. (in Japanese with English abstract 9p.)
• Hirokawa and Kuroda (1957) Nokogirizaki, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 22p. (in Japanese with English abstract 9p.)