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Motegi Formation

• Volcanic rocks
• Miocene (16.7 - 15.9 Ma; 17 Ma, Paleomagnetic)

• Sedimentary facies: Terrestrial
• Lithofacies: Island arc tholeiite, Calc-alkaline
• Lithofacies (Main): Andesitic volcanic breccia, Felsic tuff
• Lithofacies (Minor): Basaltic - dacitic lavas

• Upper limit: Unconformity (Kobana Formation)
• Lower limit: Conformity (Yamanouchi 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