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Kadoya Formation

Invalid synonym: Tsubosawa Formation, Kuroze Formation

• Coherent formation
• early Miocene (18.0 - 17.0 Ma; 20 - 17 Ma, Radiolarians, 19 - 17 Ma, FT; 18.1 - 16.7 Ma, Paleomagnetic)

• Sedimentary facies: Marine
• Sedimentary facies: Flow deposit
• Depth of water: 200 m (Lower part of lower sublittoral zone, Shellfishes)
• Lithofacies: Tuffaceous mudstone
• Lithofacies (Minor): Tuffaceous sandstone, Felsic tuff
• Sedimentary structures: Graded bedding

• Thickness: ca. 540 m
• Upper limit: Unconformity (Oro Formation)
• Lower limit: Conformity (Ohno Formation)

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

• Distribution: Taguchi, Shitara city - Ebi, Shinjo city - Midono river, Toei city, Aichi pref.
• Fossils (Shellfishes): Acilana tokunagai, Neilonella? ovata, Acila (Truncacila) sp., Malletia inermis, Neilonella? ovata, Lucinoma acutilineatum
• Fossils (Trace): Pipe rocks, Phycosiphon incertum

• Hoshi and Ogawa (2012) Jour. Geol. Soc. Japan, vol.118, no.11, pp.748-761 DOI
• Hoshi and Saida (2009) Jour. Geol. Soc. Japan, vol.115, no.5, pp.193-205 DOI