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Kakumagawa Lava Takahashi and Nishiki, 2006
- Type locality: Kakuma river, Saku city, Nagano prefecture
- Volcanic rocks
- early Pleistocene (1.09 Ma, K-Ar)
- Lithofacies: Basaltic andesite
- Lithofacies: Lavas (more than 3 flow units), Pyroclastic rocks
- Source: Tokin-no-iwa rock - Okawara pass
- Eruptive volume: 0.4 km3
- Thickness (A unit): 5 - 15 m
- Intercalated in Mochizuki Volcaniclastics.
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: 1,590 - 1,670 m above sea level, Kakuma river, Saku city, Nagano pref.
- Nishiki and Takahashi (2012) Jour. Geol. Soc. Japan, vol.118, no.8, pp.499-515 DOI