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Sennokura Pyroclastic Rock Formation
- Lithofacies (Upper): Rhyolite pyroclastic rocks
- Lithofacies (Lower): Dacite lava, Pyroclastic rocks
- Lithofacies (Lower, Minor): Shale
- Thickness (Upper): ca. 300 m
- Thickness (Lower): ca. 400 m
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Niigata pref.
- Chihara et al. (1981) Geology of the Echigo-Yuzawa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 108p. (in Japanese with English abstract 8p.)