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Minami-naganuma Formation

• Pull-apart sedimentary basin deposits
• Coherent formation
• late Oligocene

• Lithofacies: Pyroclastic sandstone, Mudstone, Pumice tuff

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

• Distribution: Umaoi hills, Hokkaido

• Okamura et al. (2010) Jour. Geol. Soc. Japan, vol.116, no.4, pp.181-198 DOI
• Hoyanagi et al. (2007) Jour. Geol. Soc. Japan, vol.113, Supplement, pp.205-215 DOI