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Nanamagarisaka Lava Hayatsu, 1972

• Type locality: Otaki creek, Shinano city, Kamiminochi county, Nagano prefecture
• Volcanic rocks
• Stratovolcano
• Pleistocene

• Lithofacies: Lava

• Distribution (Width): ca. 500 m
• Distribution (Length): ca. 2.5 km
• Thickness: ca. 50 m or thicker
• Upper limit: Unconformity (Chosui Lava, Mikaerisaka Lava)
• Lower limit: Unconformity (Hesoyama Lava)

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

• Distribution: Otaki creek - Mount Hesoyama, Shinano city, Kamiminochi county, Nagano pref.

• Nagamori et al. (2003) Geology of the Togakushi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 109p. (in Japanese with English abstract 3p.)