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Okinajima Debris Avalanche Deposit (Mizuno, 1958)
Invalid synonym: Okinajima mud flow deposit, Okinajima volcanic mudflow deposit
- Type locality: Inawashiro Daini Power Plant, Nippashi river, Kawahigashi town, Aizuwakamatsu city, Fukushima prefecture
- Coherent formation
- Pleistocene (42 ka)
- Interfingered: Bn-HP1 Tephra
- Sedimentary facies: St. Helens-type collapse
- Sedimentary facies: Flow mounds
- Lithofacies: Andesite volcanic breccia, Tuff breccia
- Thickness: 23 - 100 m
- Area: 85 km2
- Volume: 4 km3
- Bandai volcano
- [ Upper ]
- ~~~~~~~~~~~~~~
- Okinajima Debris Avalanche Deposit
- ~~~~~~~~~~~~~~
- [ Lower ]
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Inawashiro Daini Power Plant, Nippashi river, Kawahigashi town, Aizuwakamatsu city, Fukushima pref.; Okinajima hills, Fukushima pref.
- Hasegawa et al. (2011) Jour. Geol. Soc. Japan, vol.117, Supplement, pp.33-48 DOI
- Yamamoto et al. (2006) Geology of the Kitakata District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 63p. (in Japanese with English abstract 5p.)