Unit I

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Unit I

Invalid synonym: Nakakubo Formation, Masagoya Formation

Type locality: Komi - Sugyo, Kumakogen city, Kamiukena county, Ehime prefecture
Accretionary complex
Deposition: Jurassic
Correlation: Sumaizuku Unit, Niyodogawa Unit

Sedimentary facies: Marine
Lithofacies: Mélange facies
Matrix: Slate
Exotic blocks (Crusts): Sandstone, Chert, Greenstones (Basalt - Dolerite)
Exotic blocks (Crusts, Minor): Limestone, Siliceous shale, Acidic tuff

Upper limit: Thrust fault (Kashiwagi Unit)
Lower limit: Thrust fault (Unit II)

Northern Chichibu Belt (Jiyoshi, Ehime pref.)
[ Upper ]
/--/--/--/--/-
Kashiwagi Unit
/--/--/--/--/-
Unit I = Sumaizuku Unit
/--/--/--/--/-
Unit II
/--/--/--/--/-
Unit III = Sawadani Unit
/--/--/--/--/-
[ Lower ]

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

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

Distribution: Komi - Sugyo, Kumakogen city, Kamiukena county, Ehime pref.; Kuro river - Takano river - Takanohon river, Kumakogen city, Kamiukena city, Ehime pref.

Tsuji and Sakakibara (2009) Jour. Geol. Soc. Japan, vol.115, no.1, pp.1-16 DOI