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Kuwajima Formation Oishi, 1933

• Type locality: Kuwajima, Hakusan city, Ishikawa prefecture
• Coherent formation
• Early Cretaceous (130.7 Ma, U-Pb)

• Sedimentary facies: Brackish
• Lithofacies (Upper, Main): Mudstone-dominant interbedded sandstone and mudstone
• Lithofacies (Upper, Minor): Sandstone
• Lithofacies (Middle): Sandstone
• Lithofacies (Lower, Main): Mudstone-dominant interbedded sandstone and mudstone
• Lithofacies (Lower, Minor): Sandstone

• Thickness: 950 m
• Upper limit: Transitional (Akaiwa Formation)
• Lower limit: Transitional

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

• Distribution: Shiromine, Ishikawa pref. - Takinami river, Katsuyama city, Fukui pref.
• Distribution: Kuwajima - Akadani river - Togadai valley - Shimotawara river - Nishijima pass, Hakusan city, Ishikawa pref.; Tochigamiya, Katsuyama ciry, Fukui pref.
• Fossils (Upper): Dinosaurs, Turtles, Fishes, Myrene tetoriensis, Ostrea sp., Unio ogamigoensis, Viviparus onogoensis, Xenoxylon latiporosum
• Fossils (Upper, Oguchi flora): Thallites yabei, Equisetites ushimarensis, Adiantopteris sewardi, Adiantopteris sp., Birisia alata, Birisia onychioides, Cladophlebis exiliformis, Cladophlebis denticulata, Cladophlebis spp., Coniopteris burejensis, Eboracia nipponica, Gleichenites nipponensis, Gleichenites porsildii, Onychiopsis elongata, Osmundopsis distans, Ruffordia goepperti, Ctenis nipponica, Cycadites sp., Nilssonia kotoi, Nilssonia nipponensis, Nilssonia orientalis, Tetoria endoi, Dictyozamites falcatus, Dictyozamites imamurae, Dictyozamites kawasakii, Dictyozamites reniformis, Dictyozamites tetoriensis, Neozamites sp., Ginkgoidium nathorsti, Ginkgoites digitata, Ginkgoites huttonii, Czekanowskia sp., Phoenicopsis sp., Elatocladus spp., Pityophyllum sp., Podozamites lanceolatus, Podozamites reinii, Taeniopteris emarginata, Taeniopteris vittata
• Fossils (Lower): Myrene tetoriensis

• Sakai et al. (2019) Jour. Geol. Soc. Japan, vol.125, no.3, pp.255-260 DOI
• Sakai et al. (2018) Jour. Geol. Soc. Japan, vol.124, no.3, pp.171-189 DOI