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Iyo Unit

• High P/T metamorphic rocks
• Deposition (Basalt): Jurassic (ca. 155 Ma)
• Deposition (Gabbro): Jurassic (139 - 135 Ma, U-Pb)
• Protolith: Late Cretaceous (ca. 90 Ma, K-Ar)
• Metamorphism: Late Cretaceous (ca. 90 - 77 Ma, K-Ar)
• Correlation (Upper): Minawa Unit
• Correlation (Lower): Kawaguchi Formation, Koboke Unit

• Metamorphic facies: Chlorite zone
• Metamorphic facies: Pumpellyite-Actinolite facies, Epidote-Blueschist facies
• Lithofacies (Upper): Mafic schist
• Lithofacies (Lower): Pelitic schist
• Lithofacies (Minor): Siliceous schist, Psammitic schist, Meta-gabbro

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

• Distribution: Hizuchi, Yawatahama city, Ehime pref.

• 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.)