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Tatsuno Formation (Goto and Nakada, 1956)

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: ca. 500 - 630 m
• Distribution (Width): 600 m
• Upper limit: Thrust fault (Yakuno Complex)
• 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.; Toyotomi town, Himeji city, Hyogo pref.; Oyanagi town, Kasai city, Hyogo pref.
• Fossils (Limestone): Crinoids, Bryozoans (Batostomella, Fenestella sp., Fistulipora? sp., Tabuliporella), Calcisponges, Marine calcareous algae (Garwoodia)
• Fossils (Limestone, Foraminifera): Agathammina sp., Codonofusiella cf. kwangsiana, Colaniella cylindrica, Colaniella inflata, Colariella media, Colaniella minima, Colaniella parva, Colaniella xikouensis, Globivalvulina sp., Glomospira sp., Hemigordius sp., Lunucammina sp., Nodosaria sp., Pachyphloia sp., Pseudocolaniella sp., Robuloides sp., Wanganella sp.
• Fossils (Limestone, Fusulinids): Neoschwagerina douvillei?, Reichelina sp.
• Fossils (Shale, Radiolarians): Follicucullus scholasticus

• Kobayashi (2008) Jour. Geol. Soc. Japan, vol.114, no.2, pp.80-87 DOI
• Yamamoto et al. (2002) Geology of the Yamasaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 48p. (in Japanese with English abstract 4p.)
• Yamamoto et al. (2000) Geology of the Tatsuno District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 66p. (in Japanese with English abstract 5p.)
• Ozaki et al. (1995) Geology of the Hojo District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 101p. (in Japanese with English abstract 6p.)
• Igi and Wadatsumi (1980) Geology of the Kamigori District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 74p. (in Japanese with English abstract 4p.)