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Oneyama Lavas Shimazu et al., 1983

• Type locality: 1,460 m above sea level of Mount Oneyama, Yashiki, Sakae city, Shimominochi county, Nagano prefecture
• Volcanic rocks
• Pleistocene

• Lithofacies: Calc-alkaline
• Lithofacies: Hypersthene augite andesite lava (some flow units)
• Lithofacies (Minor): Volcanic breccia, Tuff breccia

• Thickness: 350 m
• Upper limit: Unconformity (Shirakurayama Lavas)
• Lower limit: Unconformity (Takizawa Lavas, Nunoiwayama Lavas, Uenohara Welded Tuff)

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

• Distribution: Mount Oneyama - Takayama creek - Akakura creek - Takizawa creek, Sakae city, Shimominochi county, Nagano pref.

• Igarashi et al. (2007) Jour. Geol. Soc. Japan, vol.113, no.11, pp.565-584 DOI
• Shimazu and Tateishi (1993) Geology of the Naebasan District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 90p. (in Japanese with English abstract 5p.)