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Biei Unit

Unit structures need to be revised by further investigation.

• Type locality: Hokkaido
• High P/T metamorphic rocks (0.5 - 0.7 GPa, 200 - 250 degree C)
• Protolith: Sorachi oceanic plateau in Panthalassa Ocean
• Protolith: Accretionary complex
• Metamorphism: Early Cretaceous (106 - 101 Ma)

• Metamorphic facies: Pumpellyite-Actinolite facies, High pressure part
• Lithofacies: Basic schist
• Lithofacies (Minor): Chert, Pelitic schst
• Lithofacies (Protolith): Lava, Pillow lava

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

• Distribution: Horokanai pass - Etanbetsu pass, Horokanai city, Uryu county, Hokkaido; Kamuikotan valley, Asahikawa city, Hokkaido

• Takeshita et al. (2018) Jour. Geol. Soc. Japan, vol.124, no.7, pp.491-515 DOI
• Takahashi et al. (2018) Jour. Geol. Soc. Japan, vol.124, no.6, pp.399-411 DOI
• Sakakibara et al. (2007) Jour. Geol. Soc. Japan, vol.113, Supplement, pp.103-118 DOI