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Uwaigusa Formation (Kitamura et al., 1968)

Invalid synonym: Uwaigusa Tuff Breccia, Honna Formation

• Type locality: Shirasawagawa forest road, Nishitani - Tamanashi, Kaneyama city, Onuma county, Fukushima prefecture
• Type locality (Original): Uwaigusa, Kaneyama city, Onuma county, Fukushima prefecture
• Volcanic rocks
• Collapse caldera-fill deposit
• Pliocene

• Sedimentary facies (Debris avalanche deposit): Caldera-collapse deposit
• Lithofacies: Rhyolite
• Lithofacies: Pyroclastic flow deposit, Debris avalanche deposit

• Thickness: ca. 300 m
• Upper limit: Unconformity (Shirifukitoge Pyroclastic Deposit, Aizu-kaneyama Volcanic Rocks)
• Lower limit: Unconformity (Takizawagawa Formation)

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

• Distribution: Uwaigusa - Honna - Lake Numazawa - Nishitani - Tamanashi, Kaneyama city, Onuma county, Fukushima pref.

• Masubuchi and Ishizaki (2011) Jour. Geol. Soc. Japan, vol.117, no.6, pp.357-376 DOI
• Yamamoto and Komazawa (2004) Geology of the Miyashita District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 71p. (in Japanese with English abstract 5p.)