Nakaidani Unit

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Nakaidani Unit Banno et al., 2010

High P/T metamorphic rocks
Protolith: Northern Chichibu Belt
Deposition (Limestone): Carboniferous (Conodonts)
Deposition (Chert): Permian, Triassic (Conodonts)
Metamorphism: Late Cretaceous (141.3 - 86.7 Ma, K-Ar)
Late Cretaceous

Metamorphic facies: Pumpellyite-Actinolite facies
Lithofacies: Pelitic phyllite, Meta-chert
Lithofacies (Minor): Meta-basalt tuff, Lava, Meta-sandstone, Crystalline limestone

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 ]

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

Distribution: Odagawa river,Uchiko city, Kita county, Ehime pref.; Nakaidani - Izumigato pass, Ozu city, Ehime pref.
Fossils: Conodonts

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.)