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Fujina Formation (Tomita and Sakai, 1937) Takayasu and Nakamura, 1984

Invalid synonym: Fujina Mudstone Formation

• Type locality: Fujina, Tamayu town, Matsue city, Shimane prefecture
• Coherent formation
• middle Miocene (14 - 13 Ma)
• Correlation: Furue Formation

• Sedimentary facies: Shallow marine
• Water temperature: Cold ocean current
• Depth of water: 20 - 60 m
• Lithofacies (Upper): Siltstone
• Lithofacies (Lower): Sandstone
• Lithofacies (Minor): Interbedded sandstone and siltstone, Interbedded sandstone and conglomerate

• Thickness: 400 m or thicker
• Upper limit: Conformity (Matsue Formation, Hikawa Formation)
• Lower limit: Conformity (Omori Formation, Kimachi Formation)

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

• Distribution: Izumo city - Yasugi city, Shimane pref.; Shinji town, Matsue city, Shimane pref.; Fujina, Tamayu town, Matsue city, Shimane pref.
• Fossils (Fujina fauna): Acila aivaricata submirabilis, Anomia sp., Buccinum yatukanum, Cancellaria sp., Clinocardium shinjiense, Conchocele sp., Crassostrea sp., Cultellus izumoensis, Cyclocardia fujinaensis, Dosinia kaneharai fujinaensis, Ennucula praenipponica, Fissidentalium yokoyamai, Fulgoraria sinziense, Glycymeris sp., Kotorapecten kagamianus kagamianus, Liracassis japonica, Lucinoma annulata, Macoma sp., Margarites sinzi, Mercenaria yokoyamai, Mizuhopecten sp., Modiolus modiolus difficilis (= Modiolus kurilensis), Macoma optiva, Nassarius sp., Neverita kiritaniana, Olivella sp., Pandora sp., Panope nomurae, Paphia sp., Periploma sp., Phos iwakianus fujinaensis, Portlandia gratiosa, Saccella confusa toyomaensis, Serripes cf. groenlandicus, Siphonalia cf. spadicea, Sulcurites cryptoconoides, Teredo sp., Thracia higashinodonoensis, Turritella tanaguraensis, Umbonium sp., Vasticardium sp.
• Fossils: Desmostylus japonicus, Argonauta tokunagai, Mizuhobaris izumoensis, Fishes (Otolith), Sharks (Teeth)
• Fossils (Ostracods): Kotoracythere tsukagoshii, Acanthocythereis koreana, Neomonoceratina cf. tsurugasakensis, Neomonoceratina japonica, Palmoconcha irizukii, Elofsonella sp., Laperousecythere sp., Palmenella limicola, Acanthocythereis dunelmensis, Acanthocythereis tsurugasakensis, Robertsonites reticuliformus
• Fossils (Foraminifera): Ammonia tochigiensis, Amphicoryna fukushimaensis, Amphicoryna pauciloculata, Anomalina glabrata, Buccella frigida, Cribroelphidium imanishii, Cribrostomoides cf. crassimargo, Cyclammina cancellata, Epistominella pulchella, Gaudryina ishikiensis, Globigerina angustiumbilicata, Globigerina praebulloides praebulloides, Globigerina praebulloides pseudociperonensis, Globigerina weissi, Globigerina woodi, Globigerinita glutinata, Globorotalia continuosa, Globorotalia quinifalcata, Globorotalia praescitula, Globorotalia peripheroronda, Globorotalia scitula, Guttulina yabei, Islandiella cf. helenae, Pullenia salisburyi, Quinaqueloculina adneriana, Quinqueloculina sakaii, Quinqueloculina vulgaris, Uvigerina akitaensis, Uvigerina cf. hootsi

• Kano (2018) Jour. Geol. Soc. Japan, vol.124, no.10, pp.781-803 DOI
• Sawada et al. (2013) Jour. Geol. Soc. Japan, vol.119, no.4, pp.267-284 DOI
• Matsuura et al. (2013) Jour. Geol. Soc. Japan, vol.119, no.4, pp.312-320 DOI
• Sato et al. (2011) Jour. Geol. Soc. Japan, vol.117, no.8, pp.439-450 DOI
• Tanaka and Nomura (2009) Jour. Geol. Soc. Japan, vol.115, no.6, pp.261-265 DOI
• Utada (2007) Jour. Geol. Soc. Japan, vol.113, no.8, pp.438-453 DOI
• Kano et al. (1998) Geology of the Taisha District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 58p. (in Japanese with English abstract 3p.)
• Kano et al. (1991) Geology of the Imaichi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 79p. (in Japanese with English abstract 5p.)