Unoya Unit

Unoya Unit Nakajima et al., 2008

Invalid synonym: Miyakoda Formation

Type locality: Unoya town, Toyohashi city, Aichi prefecture
Accretionary complex
Deposition (Chert): Middle - Late Permian, Early - Late Triassic, Early Jurassic (Radiolarians)
Deposition (Siliceous mudstone): Early Jurassic (Radiolarians)
Deposition (Mudstone): Middle Jurassic (Radiolarians)
Accretion: Middle Jurassic
Correlation: Ishigami zone

Sedimentary facies: Marine
Lithofacies: Broken facies
Lithofacies (Minor): Mélange facies
Lithofacies: Interbedded sandstone and mudstone
Matrix: Mudstone
Exotic blocks (Slabs): Chert, Sandstone

Thickness: 900 m or thicker

Chichibu Belt (Toyohashi, Aichi pref.)
[ Upper ]
/--/--/--/--/-
Ishimakisan Unit
--------------
Suse Unit
/--/--/--/--/-
Tame Unit
/--/--/--/--/-
Unoya Unit
/--/--/--/--/-
[ Lower ]

[ Upper ]
/--/--/--/--/-
Kurosegawa Belt
/--/--/--/--/-
Northern Chichibu Belt
/--/--/--/--/-
Southern Chichibu Belt
/--/--/--/--/-
[ Lower ]

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

Distribution: Unoya town - Owaki town - Ashige wetland, Toyohashi city, Aichi pref.; Miyakodagawa river - Miyakoda - Kanasashi - Sunza - Mount Okusayama - Seto - Mount Utsuyama, Hamana ward, Hamamatsu city, Shizuoka pref.
Fossils (Radiolarians): Archicapsa? pachyderma, Canesium lentum, Canoptum rugosum, Eucyrtidiellum sp., Follicucullus cf. scholasticus, Hexasaturnalis hexagonus, Hsuum minoratum, Japonocampe nova, Katroma kurusuensis, Laxtorum? jurassicum, Muelleritortis cochleata, Parahsuum simplum, Parentactinia nakatsugawaensis, Transhsuum hisuikyoense, Triassocampe coronata, Triassocampe deweveri, Tricolocapsa conexa, Tricolocapsa plicarum, Trillus elkhornensis, Yeharaia elegans

Nakashima et al. (2008) Geology of the Toyohashi and Tahara District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 113p. (in Japanese with English abstract 3p.)
Isomi and Inoue (1999) Geology of the Hamamatsu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 35p. (in Japanese with English abstract 4p.)
Saito (1955) Mikawa-Ono, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 36p. (in Japanese with English abstract 11p.)
Saito and Isomi (1954) Akihasan, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 34p. (in Japanese with English abstract 10p.)