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Chojabaru Gravels

• Coherent formation
• Pleistocene
• Correlation: Kasatoritoge Gravels

• Sedimentary facies: Fluvial
• Sedimentary facies: Alluvial fan deposit
• Lithofacies: Gravels, Sands
• Lithofacies (Minor): Volcanic ash, Pumice

• Thickness: 6 m or thicker
• Upper limit: Unconformity (Loam)
• Lower limit: Unconformity (Oishigawa Scoria, Kasuga Volcanic Rocks)

• Distribution: Chojabaru, Saku city, Nagano pref.

• Kawachi and Aramaki (1979) Geology of the Komoro District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 39p. (in Japanese with English abstract 2p.)