Izuo Unit

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Izuo Unit Shimura et al., 2017

Type locality: along Takami river, Izuo - Kotsugawa, Higashiyoshino city, Yoshino county, Nara prefecture
Accretionary complex
Cretaceous

Sedimentary facies: Marine
Metamorphic facies: Pumpellyite-Actinolite
Lithofacies: Mélange facies, Broken facies
Lithofacies: Interbedded sandstone and mudstone
Matrix: Mudstone
Exotic blocks (Slabs): Chert, Basalt

Thickness (Overall): ca. 3,000 m
Thickness (Chert): 400 m or thinner
Thickness (Sandstone): 280 m or thinner

Mugitani Formation
[ Upper ]
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Izuo Unit
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Sebato Unit
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[ Lower ]

Kouyasan Group
[ Upper ]
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Mugitani Formation
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Unokawa Formation
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Takaharagawa Formation
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Akataki Formation
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Makio Formation
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[ Lower ]

Shimanto Belt (Nara pref.)
[ Upper ]
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Kouyasan Group = North Shimanto
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Hidakagawa Group = North Shimanto
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Hikigawa Group = South Shimanto
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[ Lower ]

Shimanto Belt (Wakayama pref.)
[ Upper ]
/--/--/--/--/-
Kouyasan Group = North Shimanto
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Hidakagawa Group = North Shimanto
/--/--/--/--/-
Niunokawa Formation
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Otonashigawa Group
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Muro Group
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[ Lower ]

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

Distribution: Kotsu - the Takami and Shigo river confluence, Higashiyoshino city, Yoshino county, Nara pref.; Seto, Kawakami city - Kotsu, Higashiyoshino city, Yoshino county, Nara pref.

Shimura et al. (2019) Jour. Geol. Soc. Japan, vol.125, no.5, pp.349-365 DOI
Shimura et al. (2017) Jour. Geol. Soc. Japan, vol.123, no.11, pp.925-937 DOI