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Yunokoshiyama Rhyolite
- Type locality: Mount Yunokoshi, Gojome city, Minamiakita county, Akita prefecture
- Volcanic rocks
- Miocene
- Lithofacies: Rhyolite lava, Tuff breccia, Tuff
- Lithofacies (Minor): Perlite
- Funakawa Formation (Gojome, Akita pref.)
- [ Upper ]
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- Yunokoshiyama Rhyolite
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- Main part
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- [ Lower ]
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Mount Yunokoshi, Gojome city, Minamiakita county, Akita pref.; Urayama, Akita city, Akita pref.
- Hase and Hirayama (1970) Geology of the Gojome District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 46p. (in Japanese with English abstract 6p.)