[ Top ] [ Japanese ]

Oiri Lava Kaneko, 1988

• Type locality: 1,160 m above sea level of Uenotaira, Nozawaonsen city, Shimotakai county, Nagano prefecture
• Volcanic rocks
• early Pleistocene

• Lithofacies: Olivine augite hypersthene andesite lava
• Lithofacies (Top): Pyroclastic fall deposit

• Source: Mount Kenashiyama
• Thickness: 20 - 50 m
• Upper limit: Unconformity (Hikagerindo Lava, Oiriyama Lava)
• Lower limit: Unconformity (Honzawa Lava)

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

• Distribution: Uenotaira - southern slope of Mount Oiri, 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.)