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Shirane volcano
- Volcanic rocks
- Multiple volcano (Lava dome, Shield volcano)
- Mount Keitsuka: Shield volcano
- Pleistocene - Holocene
- Lithofacies: Olivine pyroxene andesite lava, Agglomerate, Volcaniclastics
- Lower limit: Unconformity (Quartz porphyry, Rhyolite)
- Shirane volcano
- [ Upper ]
- --------------
- Shiranesan Lava
- ~~~~~~~~~~~~~~
- [ Lower ]
- Shirane volcano
- [ Upper ]
- --------------
- Keitsukasan Lava
- ~~~~~~~~~~~~~~
- [ Lower ]
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Mount Nikkoshirane - Mount Konsei - Mount Zazen - Mount Goshiki - Mount Keitsuka, Nikko city, Tochigi pref.
- Kawata (1955) Nantaizan, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 43p. (in Japanese with English abstract 7p.)