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W3 Unit Yamada et al., 1979
- Type locality: Kibitanigawa river, Kaizuka city, Osaka prefecture
- Volcanic rocks
- Late Cretaceous, Campanian
- Intruded by: Kogigawa Granite, Biotite granodiorite porphyry
- Lithofacies: Rhyolitic dacite welded tuff
- Lithofacies (Basal): Tuffaceous mudstone, Tuffaceous sandstone
- Thickness: ca. 250 m
- Thickness (Basal): ca. 10 m
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Kibitanigawa river - Sobura - Kogigawa river, Kaizuka city, Osaka pref.; Kamikoda, Kumatori city, Sennan county, Osaka pref.
- Seike et al. (2013) Jour. Geol. Soc. Japan, vol.119, no.12, pp.759-775 DOI
- Itihara et al. (1986) Geology of the Kishiwada District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 148p. (in Japanese with English abstract 7p.)