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Koasama lava dome

• Volcanic rocks
• Pleistocene (20 ka, ¹⁴C)

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

• Distribution: Mount Koasama, Nagano pref.

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