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Yamanouchi Formation

• Volcanic rocks
• Miocene (16.9 - 16.6 Ma; 18 - 17 Ma, Paleomagnetic)

• Sedimentary facies: Terrestrial
• Lithofacies: Basalt, Andesite
• Lithofacies: Lavas, Volcanic breccia, Tuff

• Upper limit: Conformity (Motegi Formation)
• Lower limit: Unconformity (Motokozawa Formation)

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

• Distribution: Motegi city, Haga county, Tochigi pref.

• Amano et al. (2011) Jour. Geol. Soc. Japan, vol.117, Supplement, pp.69-87 DOI
• Tagiri et al. (2008) Jour. Geol. Soc. Japan, vol.114, no.6, pp.300-313 DOI