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Nigoridaki Pyroclastic Flow Deposit

• Type locality: 1,150 m above sea level, Nigorigogawa river, Osaka town, Gero city, Gifu prefecture
• Tephra
• late Pleistocene

• Lithofacies: Hypersthene hornblende rhyolite pyroclastic flow deposit
• Structures: Columnar joint

• Thickness: 100 m or thicker

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

• Distribution: Nigorigogawa river - Nigoridaki fall, Osaka town, Gero city, Gifu pref.

• Yamada and Kobayashi (1988) Geology of the Ontakesan District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 136p. (in Japanese with English abstract 9p.)