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Okenuma Unit
Abbr.: Az-OK
- Tephra
- Holocene (6,710 yBP, 14C)
- Sedimentary facies: Pyroclastic cone
- Lithofacies:
- Source: Okenuma crater
- Mode of eruption: Vulcanian
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Fukushima pref.
- Furukawa et al. (2018) Geology of the Azuma Yama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 74p. (in Japanese with English abstract 3p.)