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Yezo Group (Matsumoto, 1951) Takashima et al., 2004

Invalid synonym: Yezo Supergroup

Yezo Group had been divided into Upper Yezo Group, Middle Yezo Group and Lower Yezo Group.

• Type locality: Oyubari, Yubari city, Hokkaido
• Coherent formation
• Yezo forearc basin
• Late Cretaceous

• Lithofacies: Mudstone, Turbidite sandstone

• Thickness: ca. 10,000 m
• Distribution (South-North): ca. 300 m
• Upper limit: Unconformity (Ishikari Group, Poronai Group)
• Lower limit: Conformity (Sorachi Group), Unconformity (Kamuikotan Metamorphic Rocks)

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

• Distribution: Teshio-Nakagawa, Haboro, Tomamae, Kotanbetsu, Rumoi-Obira, Ashibetsu, Mikasa, Oyubari, Mukawa-Hitahobetus, Hokkaido
• Key beds: KY-1, KY-2, KY-3, KY-4, KY-5, KY-6

• Takahashi et al. (2018) Jour. Geol. Soc. Japan, vol.124, no.6, pp.399-411 DOI
• Takashima et al. (2018) Jour. Geol. Soc. Japan, vol.124, no.6, pp.381-398 DOI
• Shimada et al. (2013) Jour. Geol. Soc. Japan, vol.119, no.6, pp.432-436 DOI
• Honda et al. (2011) Jour. Geol. Soc. Japan, vol.117, no.11, pp.599-616 DOI
• Hayashi et al. (2011) Jour. Geol. Soc. Japan, vol.117, no.1, pp.14-34 DOI
• Takahashi (2010) Jour. Geol. Soc. Japan, vol.116, no.8, pp.412-417 DOI
• Tsujino (2009) Jour. Geol. Soc. Japan, vol.115, no.3, pp.122-129 DOI
• Tamaki et al. (2008) Jour. Geol. Soc. Japan, vol.114, no.5, pp.207-217 DOI
• Hoyanagi et al. (2007) Jour. Geol. Soc. Japan, vol.113, Supplement, pp.205-215 DOI
• Ando et al. (2007) Jour. Geol. Soc. Japan, vol.113, Supplement, pp.185-203 DOI
• Ueda (2007) Jour. Geol. Soc. Japan, vol.113, Supplement, pp.137-152 DOI