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Koriyama Formation Yoshida et al., 1969

• Coherent formation
• Pleistocene

• Sedimentary facies: Alluvial fan deposit
• Lithofacies: Gravels, Sands

• Distribution: Southeastern flank of Mount Oshoyama, Koriyama city, Fukushima pref.

• Sakaguchi (1995) Geology of the Nihonmatsu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 79p. (in Japanese with English abstract 4p.)