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Iwaizumi Belt (Onuki, 1956) Shimazu et al., 1970

Invalid synonym: Iwaizumi Group, Iwaizumi Formation

The western part (North Kitakami Belt sensu stricto) is interpreted as a part of Kuzumaki-Kamaishi Sub-belt, and the eastern part (Akka Belt) is as a part of Akka-Tanohata Sub-belt..

• Accretionary complex
• Deposition (Limestone): Late Jurassic
• Accretion: Jurassic

• Lithofacies: Slate, Chert, Sandstone, Limestone, Basaltic lava, Basaltic tuff
• Lithofacies (Minor): Limestone conglomerate

• East limit: Taro Fault/Tectonic Line (Taro Belt)
• West limit: Kuzumaki Fault/Tectonic Line (North Kitakami Belt)

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

• Distribution: Tamagawa seashore, Noda city, Kunohe county, Iwate pref.

• Umetsu et al. (2013) Jour. Geol. Soc. Japan, vol.119, Supplement, pp.82-95 DOI
• Yoshida et al. (1987) Geology of the Rikuchu-Ono District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 70p. (in Japanese with English abstract 6p.)
• Shimazu et al. (1970) Geology of the Taro District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 54p. (in Japanese with English abstract 6p.)