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Km1 Tephra
Abbr.: Km1
- Type locality: Kashimamyojin shrine, Gomoto, Teradomari, Nagaoka city, Niigata prefecture
- Tephra
- middle Miocene - early Pliocene (5.87 Ma, FT)
- Lithofacies: Silt-size volcanic ash (3 units)
- Sedimentary structures (Upper): Graded bedding
- Sedimentary structures (Middle): Parallel lamination
- Sedimentary structures (Lower): Graded bedding
- Thickness: 24 cm
- Thickness (Upper): 8 cm
- Thickness (Middle): 9 cm
- Thickness (Lower): 7 cm
- Host: Shiiya Formation
- Km Tephra
- [ Upper ]
- --------------
- Km2
- --------------
- Km1
- --------------
- [ Lower ]
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Gomoto, Teradomari, Nagaoka city, Niigata pref.
- 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.)