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Shinano Formation Matsuzawa et al., 1960

Invalid synonym: Kamihadagawa Formation, Nishihirose Formation

• Type locality: Shinano, Seto city, Aichi prefecture
• Coherent formation
• First Seto Inland Sea
• Sedimentary basin in island arc
• early - middle Miocene (18.0, 15.2 Ma, FT)
• Correlation: Akeyo Formation

• Sedimentary facies: Shallow marine
• Sedimentary facies: Mud floor
• Climate: Temperate deciduous broad-leaved forest
• Depth of water: 50 - 60 m
• Lithofacies: Sandstone, Sandy siltstone, Siltstone, Tuffaceous sandstone

• Thickness: ca. 15 - 40 m or thicker
• Upper limit: Unconformity (Seto Porcelain Clay Formation, Fujioka Formation)
• Lower limit: Unconformity (Younger Ryoke Granitoids)

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

• Distribution: Shinano - Mizuno, Seto city, Aichi pref.; Kitashin town, Nisshin city, Aichi pref.; Tamomi town - Ohata town - Nishihirose town - Tamodaira town - Fuso town - Yagusa town, Toyota city, Aichi pref.
• Fossils: Decapods, Brachiopods (Disctinisca sp.), Bryozoans
• Fossils (Shellfishes): Acila sumirabilis, Batillaria? sp., Calyptraea tubura, Chlamys iwamurensis, Crassostreas p., Cultellus izumoensis, Cyclocardia siogamensis, Dosinorbis nomurai, Euspira meisensis, Hamalopoma sp., Liocyma minuta, Lucinoma acutilineatum, Nipponomarcia nakamurai, Periploma sp., Phos minoensis, Proclava otukai, Protorotella cf. depressa, Saccella miensis, Siphonalia? sp., Siratoria siratoriensis, Soldicorbula sp., Teredo sp., Tritia sp., Turritella sagai, Vicaryella ishiiana, Zeuxis kometubus
• Fossils (Daijima-type flora): Acer rotundatum, Carpinus miofangiana, Carpinus subcoradata, Corylus sp., Machilus sp., Magnolia miocenica, Metasequoia occidentalis, Parrotia pristina
• Fossils (Diatoms): Actinoptychus senarius, Paratia sulcata, Stellarima microtrias, Stephanopyxis sp., Thalassionema nitzschioides
• Tephra: Tamomi Tephra

• Nakashima et al. (2021) Geology of the Toyota District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 91p. (in Japanese with English abstract 4p.)
• Hatano and Yoshida (2018) Jour. Geol. Soc. Japan, vol.124, no.3, pp.191-205 DOI