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Mizunashigawa Lavas (Nishiki et al., 2007) Nishiki and Takahashi, 2012

Abbr.: MI

• Type locality: 1,730 m above sea level of Mount Yabashira, Sakuho city, Minamisaku county, Nagano prefecture
• Volcanic rocks
• early Pleistocene (0.92 - 0.87 Ma, K-Ar)

• Lithofacies: Olivine clinopyroxene basaltic andesite
• Lithofacies: Lavas (more than 10 flow units), Debris flow deposit

• Source: Mount Yabashira
• Eruptive volume: 5.6 km³
• Thickness (A unit): 1 - 10 m
• Lower limit: Yagori Volcaniclastics, Oishigawa Pyroclastic Flow

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

• Distribution: 1,050 - 2,114 m above sea level, Yabashira creek - Mizunashi river, Sakuho city, Minamisaku county, Nagano pref.

• Nishiki and Takahashi (2012) Jour. Geol. Soc. Japan, vol.118, no.8, pp.499-515 DOI
• Nishiki et al. (2007) Jour. Geol. Soc. Japan, vol.113, no.5, pp.193-211 DOI