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Mizukoshi Formation Matsumoto and Fujimoto, 1939

• Type locality: Mizukoshi, Mifune city, Kamimashiki county, Kumamoto prefecture
• Coherent formation
• Permian, middle - late Guadalupian (Radiolarians, Fusulinids, Brachiopods)

• Sedimentary facies: Marine
• Lithofacies (Upper): Mudstone
• Lithofacies (Upper, Minor): Turbidite sandstone, Calcaeous mudstone, Conglomerate (Usuginu-type)
• Lithofacies (Upper, Basal): Tuffaceous sandstone
• Lithofacies (Lower): Mudstone
• Lithofacies (Lower, Minor): Siliceous tuff, Tuffaceous mudstone

• Thickness: 1,390 m
• Thickness (Upper): 640 m
• Thickness (Upper, Basal sandstone): 50 - 60 m
• Thickness (Lower): 1,050 m
• Distribution (East-West): 8 km
• Distribution (South-North): 2 km
• Upper limit: Unconformity (Basal Formation of Mifune Group)

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

• Distribution: Miyao - Mizukoshi - Fujiki, Mifune city, Kamimashiki county, Kumamoto pref.
• Fossils (Mizukoshi fauna): Fusulinids, Brachiopods, Boreal type-dominant Boreal-Tethyan mixed fauna
• Fossils (Limestone): Foraminifera, Crinoids, Calcareous algae
• Fossils (Limestone, Fusulinids): Lepidolina cf. gubleri, Lepidolina cf. yasubaensis, Lepidolina cf. toriyamai, Lepidolina multiseptata, Lepidolina shiraiwensis, Lepidolina kumaensis
• Fossils (Radiolarians, Upper): Follicucullus charveti, Follicucullus dilatatus, Follicucullus scholasticus, Follicucullus porrectus, Follicucullus ventricosus
• Fossils (Radiolarians, Lower): Follicucullus scholasticus, Follicucullus porrectus, Follicucullus cf. ventricosus
• Fossils (Shale): Corals, Bivalves, Cephalopods, Trilobites, Crinoids
• Fossils (Shale, Brachiopods): Anidanthus ussuricus (= Linoproductus cf. lineatus), Gypospirifer volatilis (= Neospirifer fasciger), Alispiriferella lita (= Spiriferella keilhavii), Neochonetes (Zhongyingia) zhongyingensis, Kitakamichonetes multicapillatus, Capillomesolobus sp., Transennatia gratiosa, Waagenoconcha permocarbonica, Waagenoconcha krystofovichi, Anidanthus mizukoshiensis, Terrakea yanagidai, Yakovlevia kaluzinensis, Urushtenoidea crenulata, Permianella typica, Derbyia nipponica, Acosarina cf. circular, Orthotichia sp., Hustedia ratburiensis, Rhynchopora matsumotoi, Rhynchopora sp., Elivina sp., Dielasma sp.

• Ishida (2010) Jour. Geol. Soc. Japan, vol.116, no.1, pp.55-59 DOI
• Tazawa et al. (2008) Jour. Geol. Soc. Japan, vol.114, no.6, pp.269-285 DOI