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Shimosato Sandstone and Mudstone
- Type locality: Uragami - Sho, Nachikatsuura city, Higashimuro county, Wakayama prefecture
- Coherent formation
- Miocene
- Sedimentary facies: Marine
- Lithofacies: Sandstone, Mudstone
- Lithofacies (Minor): Tuff
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Uragami - Sho - Ugui - Konoshiro - Cape Miminohana, Nachikatsuura city, Higashimuro county, Wakayama pref.; Tagawa - Yamate - Gondaira - Shimosato, Kozagawa city, Higashimuro county, Wakayama pref.; Tawara - Tanami, Kushimoto city, Higashimuro county, Wakayama pref.; Taiji city, Higashimuro county, Wakayama pref.
- Fossils: Corals, Brachiopods (Terebratalia? sp.), Foraminifera (Cyclammina sp.), Bryozoans
- Fossils (Shellfishes): Acila sp., Ancistrolepis sp., Cancellaria cf. hukushimana, Conchocele disjuncta, Dosinia nomurai, Lucinoma sp., Macoma optiva, Neverita cf. coticazae, Periploma owasense, Portlandia murayamai, Portlandia cf. thraciaeformis, Solen sp., Tapes sp., Turritella s-hataii, Turritella tanaguraensis, Venericardia cf. ferruginea, Venericardia orbicularia
- Hirokawa and Mizuno (1965) Kushimoto, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 25p. (in Japanese with English abstract 3p.)
- Mizuno and Imai (1964) Tanami, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 61p. (in Japanese with English abstract 4p.)
- Mizuno (1957) Nachi, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 37p. (in Japanese with English abstract 3p.)