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Iwayakan'non Lava

• Volcanic rocks
• Pleistocene (0.94 Ma, K-Ar)

• Lithofacies: Lava
• Lithofacies: two pyroxene andesite

• Source: West of Mount Kakuma
• Flow unit: A few tens of sheets
• Thickness (Flow unit): 2 - 15 m
• Upper limit: Unconformity (Gotomiki Lava)
• Lower limit: Unconformity

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

• Distribution: Kakuma river, Tsumagoi city, Gunma pref.

• Nishiki et al. (2013) Jour. Geol. Soc. Japan, vol.119, no.7, pp.474-487 DOI