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Sdp Tephra Kurokawa et al., 1987
Abbr.: Sdp
- Type locality: Yamada, Teradomari, Nagaoka city, Niigata prefecture
- Tephra
- Pliocene - Pleistocene
- Lithofacies: Pumiceous volcanic ash
- Sdp Tephra
- [ Upper ]
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- Sdp-C
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- Sdp-B
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- Sdp-A
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- [ Lower ]
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Yamada - Shido bridge - Ochimizu, Teradomari, Nagaoka city, Niigata pref.; Inohana - Kodake - Tateishi, Izumozaki city, Santo county, Niigata pref.; Otsu, Nishiyama town, Kashiwazaki city, Niigata pref.; Miyagawa seashore - Takahama elementary school, Kashiwazaki city, Niigata pref.
- Kobayashi et al. (2002) Geology of the Sanjo District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 98p. (in Japanese with English abstract 4p.)
- Kobayashi et al. (1995) Geology of the Kashiwazaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 102p. (in Japanese with English abstract 4p.)
- Kobayashi et al. (1993) Geology of the Izumozaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 91p. (in Japanese with English abstract 4p.)