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Chokai Unit

Synonym: Asaji Metamorphic Rocks

Correlation unknown.

• Type locality: Asaji, Bungo-ohno city, Oita prefecture
• Low P/T metamorphic rocks (0.2 GPa, 610 degrees Celsius)
• Metamorphism: Cretaceous?

• Lithofacies (Protolith): Mélange facies
• Lithofacies (Protolith): Pelitic rocks
• Lithofacies (Protolith, Minor): Siliceous mudstone, Mafic rocks, Sandstone, Chert, Limestone

• Distribution (Length): 20 km
• Distribution (Width): 2 - 4 km
• Upper limit: Thrust fault (Ultramafic Unit), Unconformity (Ryozen Formation)

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

• Distribution: Notsuharu, Oita city, Oita pref.; Asaji, Bungo-ono city, Oita pref.

• Fujii et al. (2008) Jour. Geol. Soc. Japan, vol.114, no.3, pp.127-140 DOI
• Takagi et al. (2007) Jour. Geol. Soc. Japan, vol.113, no.1, pp.1-14 DOI