Akka - Tanohata Sub-belt

[ Top ] [ Japanese ]

Invalid synonym: Otanabe Formation, Akkagawa Formation, Taro Belt, eastern part of Iwaizumi Belt (Akka Belt)

Accretionary complex
Early Triassci - Late Jurassic

Sedimentary facies: Marine
Lithofacies: Coherent facies (Chert-clastic sequence)
Lithofacies: Feldspar and quartz rich sandstone

Upper limit: Iwaizumi Tectonic Line, Seki- Odaira Fault
Upper limit: Unconformity (Tanohata Formation, Kuji Group)

Asamushi, Aomori pref.
/--/--/--/--/-
Tateishi Formation
/--/--/--/--/-
Higashidake Formation
/--/--/--/--/-

Cape Shiriya, Aomori pref.
[ Upper ]
/--/--/--/--/-
Shiriya Group
/--/--/--/--/-
[ Lower ]

Ichinohe, Iwate pref.
[ Upper ]
/--/--/--/--/-
Takayashiki Formation
/--/--/--/--/-
[ Lower ]

Rikuchu-Seki, Iwate pref.
[ Upper ]
/--/--/--/--/-
Takayashiki Formation
/--/--/--/--/-
Akka Formation
/--/--/--/--/-
Sawayamagawa Formation
/--/--/--/--/-
Magidai Formation
/--/--/--/--/-
Kisawahata Formation
/--/--/--/--/-
[ Lower ]

Akka - Kuji, Iwate pref.
[ Upper ]
/--/--/--/--/-
Takayashiki Unit
/--/--/--/--/-
Akka Unit
/--/--/--/--/-
Magidai Formation
/--/--/--/--/-
Kisawahata Formation
/--/--/--/--/-
[ Lower ]

Tanohata, Iwate pref.
[ Upper ]
/--/--/--/--/-
Magisawa Formation
/--/--/--/--/-
Koshimeguri Formation
/--/--/--/--/-
[ Lower ]

North Kitakami Belt
[ Upper ]
/--/--/--/--/-
Kuzumaki - Kamaishi Sub-belt
/--/--/--/--/-
Akka - Tanohata Sub-belt
/--/--/--/--/-
[ Lower ]

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

Distribution: Kuji city - Akka, Iwaizumi city, Shimohei county, Iwate pref.; Tanohata city, Shimohei county, Iwate pref.

Tuzino et al. (2018) Geology of the Ichinohe District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 161p. (in Japanese with English abstract 4p.)
Takahashi et al. (2016) Jour. Geol. Soc. Japan, vol.122, no.1, pp.1-22, DOI
Ehiro et al. (2008) Jour. Geol. Soc. Japan, vol.114, Supplement, pp.121-139 DOI
Uemura (1983) Geology of the Asamushi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 40p. (in Japanese with English abstract 4p.)
Shimazu and Teraoka (1962) Rikuchu-Noda, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 53p. (in Japanese with English abstract 11p.)