[ Top ] [ Japanese ]

Ojiroyama Lava Igarashi et al., 1984

• Type locality: Hikage creek, Okushiga forest road, Sakae city, Shimominochi county, Nagano prefecture
• Volcanic rocks
• Pleistocene

• Lithofacies: Hypersthene augite andesite lava
• Lithofacies (Minor): Tuff breccia

• Thickness: 100 m
• Upper limit: Unconformity (Shigarindo Lava, Kawakurumizawa Lava, Oirizawa Lava)

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

• Distribution: Hikage creek, Okushiga forest road, Sakae city, Shimominochi county, Nagano pref.; Mount Ojiro, Sakae city, Shimominochi county, Nagano pref.

• 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.)