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1340-ho Lava Hayatsu, 1976
- Type locality: summit of 1,340 m peak, Nagano city, Nagano prefecture
- Volcanic rocks
- Lava dome
- Pleistocene (0.22 Ma, K-Ar)
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: 1,340 m peak, Nagano city, 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.)