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Tsubata Siltstone Member
- Type locality: Nakatsubata - Oshirodai elementary school, Tsubata city, Kahoku county, Ishikawa prefecture
- Coherent formation
- Pliocene
- Sedimentary facies: Marine
- Lithofacies: Siltstone
- Lithofacies (Minor): Tuff
- Lithofacies (Bottom): Gravel-bearing sandstone, Sandstone
- Sedimentary structures (Tuff): Ripple stratification
- Paleocurrent: to West
- Himi Formation (Tsubata, Ishikawa pref.)
- [ Upper ]
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- Tsubata Siltstone Member
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- [ Lower ]
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Nakatsubata - Oshirodai elementary school - Kamo, Tsubata city, Kahoku county, Ishikawa pref.
- Fossils (Shellfishes): Acila (Acila) divaricata, Cryptonatica janthostomoides, Glycymeris (Glycymeris) yessoensis, Limopsis (Limopsis) tokaiensis, Mya cuneiformis, Portlandia (Megayoldia) thraciaeformis, Turritella (Neohaustator) saishuensis saishuensis, Venericardia (Cyclocardia) ferruginea orbicularsis
- Sumi et al. (1989) Geology of the Isurugi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 118p. (in Japanese with English abstract 5p.)
- Sumi (1978) Geology of the Tsubata District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 55p. (in Japanese with English abstract 4p.)