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Nishiakaishi mass

Associated with Eastern Iratsu mass, tectonic blocks of metamorphosed plutonic rocks originated from lower crust - upper mantle

• High P/T metamorphic rocks
• Solid intruded mantle material into Sanbagawa metamorphic rock
• Correlation: Kamikabuto mass, Kumogahara mass, Higashiakaishi mass, Imono mass

• Metamorphic facies: Eclogite facies

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

• Distribution: Ehime pref.

• Aoya et al. (2013) Geology of the Niihama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 181p. (in Japanese with English abstract 3p.)