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Joetsu-O18L Tephra
Abbr.: JA-O18L
Synonym: JA, O18L
- Tephra
- Pleistocene (1.12 Ma)
- Correlation: SK030
- O18 Tephra
- [ Upper ]
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- Upper
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- Middle
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- JA-O18L
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- [ Lower ]
- SK030 Tephra
- [ Upper ]
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- JA-O18L
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- [ Lower ]
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Boso peninsula, Chiba pref.
- Utsunomiya and Ooi (2019) Geology of the Kazusa-Ohara District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 127p. (in Japanese with English abstract 4p.)
- Tamura et al. (2019) Jour. Geol. Soc. Japan, vol.125, no.1, pp.23-39 DOI
- 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.)