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Tatsuno Formation

Invalid synonym: Upper Tatsuno Group, , Upper Nakagaichi Formation

• Type locality: Iseki, Issai town, Tatsuno city, Hyogo prefecture
• Paleozoic volcanic island arc in the ocean (Yakuno paleo-island arc)
• Coherent formation
• late Permian, Wuchlapingian
• Correlation: Upper Formation of Maizuru Group, Middle Formation of Maizuru Group

• Lithofacies: Mudstone
• Lithofacies (Minor): Sandstone, Interbedded mudstone and sandstone, Limestone, Conglomerate

• Thickness: 500 m
• Upper limit: Thrust fault (Yakuno Ophiolite)
• Lower limit: Thrust fault (Yamasaki Formation)

------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown

• Distribution: Iseki, Issai town, Tatsuno city, Hyogo pref.; Tatsuno city - northern Aioi city, Hyogo pref.
• Fossils (Limestone): Crinoids, Bryozoans, Calcisponges, Marine algae
• Fossils (Limestone, Foraminifera): Colaniella parva, Codonofusiella cf. kwangsiana

• Kobayashi (2008) Jour. Geol. Soc. Japan, vol.114, no.2, pp.80-87 DOI