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Bg-1 Tephra
Abbr.: Bg-1
- Type locality: Bango, Sakurayama, Zushi city, Kanagawa prefecture
- Tephra
- Pliocene
- Lithofacies: Pumice, Crystalline volcanic ash
- Sedimentary structures: Parallel stratification
- Bg Tephra
- [ Upper ]
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- Bg-3
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- Bg-2
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- Bg-1
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- [ Lower ]
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Sakurayama - Numama, Zushi 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.)