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Hodonoirigawa Lavas Mukai et al., 2009
- Type locality: 1,300 m above sea level of Hodonoiri river, Nagawa city, Chiisagawa county, Nagano pref.
- Volcanic rocks
- Pleistocene (2.11 Ma, K-Ar)
- Lithofacies: Volcaniclastics, Lava
- Lithofacies (Upper): Volcanic lapilli tuff, Olivine two pyroxene andesite lava
- Lithofacies (Lower): Conglomerate
- Eruptive volume: 0.58 km3 or more
- Thickness: ca. 5 - 250 m
- Lower limit: Unconformity (Uchimura Formation)
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: more than 1,300 m above sea level of Hodonoiri river - Nonoiri river, Nagawa city, Chiisagata county, Nagano pref.; more than 1,350 m above sea level of Ozawane river, Nagawa city, Chiisagawa county, Nagano pref.; Mount Monomiishi - Shirakabadaira, Ueda city, Nagano pref.
- Mukai et al. (2009) Jour. Geol. Soc. Japan, vol.115, no.8, pp.400-422 DOI