Uchiko Unit

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Uchiko Unit Banno et al., 2010

High P/T metamorphic rocks (ca. 350 degree C, 0.48 - 0.53 GPa)
Deposition (Limestone): Triassic (Conodonts)
Deposition (Chert): Permian, Triassic (Conodonts)
Protolith: Late Cretaceous (175 - 87 Ma, U-Pb)
Metamorphism: Late Cretaceous (94.6, 90.6 Ma, K-Ar)
Correlation: upper Minawa Unit

Metamorphic facies: Chlorite zone
Metamorphic facies: Pumpellyite-Actinolite facies
Lithofacies: Pelitic schist
Lithofacies (Minor): Mafic schist, Siliceous schist, Psammitic schist, Calcareous schsit, Serpentinite

Thickness: 1,650 m or thicker
Distribution (Width): ca. 2 - 7 km

Sanbagawa Metamorphic Rocks (eastern Ozu, Ehime pref.)
[ Upper ]
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Nakaidani Unit
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Fukuoka Unit
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Kannan Unit = Mikabu Unit
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Ozu Unit
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Uchiko Unit
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Iyo Unit
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[ Lower ]

Sanbagawa Metamorphic Rocks (western Ozu, Ehime pref.)
[ Upper ]
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Hijikawa Unit
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Mikabu Unit
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Ozu Unit
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Uchiko Unit
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Kikitsu Unit
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Iyo Unit
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[ Lower ]

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

Distribution: Kajiyadani - Mount Kosanjiyama - Gotoge pass - Hiraji, Ozu city, Ehime pref.; Mount Kurakakeyama, Yawatahama city, Ehime pref.; Uchiko - Ose, Uchiko city, Kita county, Ehime pref.
Fossils: Conodonts

Miyazaki (2024) Geology of the Iyo-Nagahama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 155p. (in Japanese with English abstract 5p.)
Banno et al. (2010) Geology of the Ozu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 58p. (in Japanese with English abstract 2p.)