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Besshi Eclogite Unit, Eclogite Unit

Invalid synonym: Besshi unit (includes Shirataki unit), Besshi nappe

• High P/T metamorphic rocks
• Metamorphism (Eclogite facies): Late Cretaceous (88.8, 88.2 Ma, Lu-Hf)
• Metamorphism (Main): Late Cretaceous (85.6 Ma, U-Pb)
• Metamorphism (Chlorite zone): Late Cretaceous (94 - 85 Ma, Ar-Ar; 92.6 Ma, FT)
• Correlation: Iimori Unit
• Correlation (Lower): Northern Shimanto Belt

• Metamorphic facies: Eclogite facies
• Metamorphic facies (Chlorite zone, Upper): Greenschist
• Metamorphic facies (Chlorite zone, Lower): Pumpellyite-Actinolite
• Metamorphic facies (Oligoclase - Biotite zone): 610 degree C, 0.9 - 1.1 GPa
• Metamorphic facies (Albite - Biotite zone): 520 - 540 degree C, 0.8 - 1.1 GPa
• Metamorphic facies (Garnet zone): 440 - 480 degree C, 0.7 - 1.0 GPa
• Metamorphic facies (Chlorite zone): 360 degree C, 0.55 - 0.65 GPa
• Lithofacies (Protolith): Deep sea sediments
• Lithofacies: Pelitic schist, Basic schist, Siliceous schist

• Lower limit: Thrust fault

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

• Distribution: Niihama city - Shikokuchuo city, Ehime pref.; Shirataki, Okawa city, Tosa county - Motoyama city, Nagaoka county, Kochi pref.
• Distribution (Chlorite zone): Toyosaka, Tomisato village, Shikokuchuo city, Ehime pref.; Waseda, Motoyama city, Nagaoka county, Kochi pref.

• Aoya et al. (2017) Jour. Geol. Soc. Japan, vol.123, no.7, pp.491-514 DOI
• Takeshita et al. (2011) Jour. Geol. Soc. Japan, vol.117, no.1, pp.53-56 DOI
• Otoh et al. (2010) Jour. Geol. Soc. Japan, vol.119, No.2, pp.333-346 DOI
• Sakurai and Takasu (2009) Jour. Geol. Soc. Japan, vol.115, no.3, pp.101-121 DOI
• Okamoto et al. (2009) Jour. Geol. Soc. Japan, vol.115, Supplement, pp.37-49 DOI