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NA37 Tephra
Abbr.: NA37
- Type locality: Nobe river, Ojiya city, Niigata prefecture
- Tephra
- Pliocene
- Lithofacies: Andesite tuff (6 units)
- NA37
- [ Upper ]
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- NA37F
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- NA37E
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- NA37D
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- NA37C
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- NA37B
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- NA37A
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- [ Lower ]
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Nobe river, Ojiya city, Niigata pref.; Imogawa river - Takinomata, Uonuma city, Niigata pref.
- Yanagisawa et al. (1986) Geology of the Ojiya District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 177p. (in Japanese with English abstract 6p.)