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Kogawa Formation

• Type locality: Iwate prefecture
• Coherent formation
• Eocene

• Lithofacies: Sandstone, Breccia

• Distribution: Matsuhashi river, Matsuhashi, Iwaizumi city, Shimohei county, Iwate pref.

• Tsuchiya et al. (2008) Jour. Geol. Soc. Japan, vol.114, Supplement, pp.159-179 DOI
• Yoshida and Katada (1984) Geology of the Miyako District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 44p. (in Japanese with English abstract 6p.)