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Sonobe Formation

• Type locality: Sono elementary school, Sonobe town, Nantan city, Kyoto prefecture
• Coherent formation
• Pleistocene
• Correlation: Shitsukawa Formation

• Lithofacies: Gravels
• Lithofacies (Minor): Clay

• Thickness: 10 - 20 m or thicker
• Lower limit: Unconformity (Tamba Belt)

• Distribution: Sonobe elementary school - Wakamori - Shishiudo - Uchibayashi - Kumazaki, Sonobe town, Nantan city, Kyoto pref.; Honme town - Takashiba - Yunohana, Kameoka city, Kyoto pref.

• Imoto et al. (1991) Geology of the Sonobe District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 68p. (in Japanese with English abstract 4p.)
• Imoto et al. (1989) Geology of the Kyoto-Seihokubu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 84p. (in Japanese with English abstract 4p.)