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Ok3 Tephra
Abbr.: Ok3
- Lithofacies: Crystalline volcanic ash
- Ok Tephra
- [ Upper ]
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- Ok4
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- Oksco
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- Ok3
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- Ok2
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- Ok1
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- [ Lower ]
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Mount Ogusuyama - Kurihama - Abekura - Nagase, Yokosuka city, Kanagawa pref.; Kannonhana seashore - Cape Tenjinnzaki, Sajima, Yokosuka city, Kanagawa pref.; Kikuna, Minamishimoura town, Miura city, Kanagawa pref.
- Eto et al. (1998) Geology of the Yokosuka District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 128p. (in Japanese with English abstract 3p.)