Kadoya Formation

[ Top ] [ Japanese ]

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)

Hokusetsu Subgroup
[ Upper ]
~~~~~~~~~~~~~~
Kadoya Formation
--------------
Ohno Formation
--------------
Kawakado Formation
--------------
Taguchi Formation
~~~~~~~~~~~~~~
[ Lower ]

Shitara Group
[ Upper ]
?--?--?--?--?-
Nansetsu Subgroup (Shitara Volcanic Rocks)
~~~~~~~~~~~~~~
Hokusetsu Subgroup
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Taguchi, Shitara city, Kitashitara county, Aichi pref.; Ebi - Kuroze, Shinjo city, Aichi pref.; Midono river, Toei city, Kitashitara county, 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