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Komadeike Volcaniclastics

Abbr.: KO

• Type locality: Lake Komade, Sakuho city, Minamisaku county, Nagano prefecture
• Volcanic rocks
• early Pleistocene (1.01 - 0.93 Ma, K-Ar)

• Lithofacies: Volcanic fan
• Lithofacies: Olivine clinopyroxene basalt
• Lithofacies: Lavas (5 flow units), Debris flow deposit, Welded pyroclastic rocks, Agglutinates

• Source: Oishi river
• Eruptive volume: 9.6 km³
• Thickness (A unit): 1 - 5 m
• Upper limit: Unconformity (Usonokuchi Gravel Bed)
• Upper limit: Chiyosato-bokujo Lavas
• Lower limit: Kabutoiwa Lava

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

• Distribution: 800 - 1,450 m above sea level, east slope of Mount Kengamine, Sakuho city, Minamisaku county, Nagano pref.

• Nishiki and Takahashi (2012) Jour. Geol. Soc. Japan, vol.118, no.8, pp.499-515 DOI