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Oiriyamasancho Lava Kaneko, 1988

• Type locality: 1,270 m above sea level of the summit of Mount Oiriyama, Nozawaonsen city, Shimotakai county, Nagano prefecture
• Volcanic rocks
• early Pleistocene

• Lithofacies: Olivine-bearing augite hypersthene andesite lava

• Source: Mount Kenashiyama
• Thickness: 50 m or thinner
• Lower limit: Unconformity (Hikagerindo Lava)

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

• Distribution: summit of Mount Oiriyama, Nozawaonsen city, Shimotakai county, Nagano pref.

• Yanagisawa et al. (2000) Geology of the Iiyama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 144p. (in Japanese with English abstract 6p.)