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Ar Tephra (Tsuchi, 1976) Mizuno et al., 1987
Abbr.: Ar
- Type locality: Arigaya - Shinogaya, Omaezaki city, Shizuoka prefecture
- Tephra
- Pliocene - early Pleistocene
- Lithofacies: Volcanic ash
- Ar Tephra
- [ Upper ]
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- Ar-V
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- Ar-IV
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- Ar-III
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- Ar-II
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- Ar-I
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- [ Lower ]
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Arigaya - Shinogaya - Kadoya, Omaezaki city, Shizuoka pref.; Kawakami - Kikukawa city, Shizuoka pref.
- Sugiyama et al. (1988) Geology of the Omaezaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 153p. (in Japanese with English abstract 6p.)