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Nunoiwayama Lavas Shimazu et al., 1983

• Type locality: 1,300 m above sea level or higher of Mount Nunoiwa, Sakae city, Shimominochi county, Nagano prefecture
• Volcanic rocks
• Pleistocene

• Lithofacies: Calc-alkaline
• Lithofacies: Hypersthene augite andesite lava (3 flow units)
• Lithofacies (Bottom): Tuff breccia, Volcanic breccia

• Thickness: 200 m or thicker
• Upper limit: Unconformity (Oneyama Lavas, Takizawa Lavas)
• Lower limit: Unconformity (Uenohara Welded Tuff, Kusso Formation)

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

• Distribution: summit of Mount Nunoiwa, Sakae city, Shimominochi county, Nagano pref.; northern flank of Mount Torikabuto, 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.)