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Karayama Formation Matsuzawa and Kato, 1954

• Coherent formation
• Higher terrace depositsl
• early - middle Pleistocene
• Correlation: Kamisue Formation, Yatomi Formation, Kagiya Formation

• Sedimentary facies: Fluvial
• Paleo-river system: Kisogawa river or Tokigawa river
• Lithofacies (Upper): Sands, Silt
• Lithofacies (Lower): Gravels

• Thickness (Upper): 3 - 4 m
• Thickness (Lower): 3 - 6 m
• Upper limit: Unconformity (Yagoto Formation)
• Lower limit: Unconformity (Yadagawa Formation)

• Distribution: Ryusenji - Higashiyama - Nagoya university, Nagoya city, Aichi pref.
• Tephra: Nekogahora Tephra

• Sakamoto et al. (1986) Geology of the Nagoya-Nambu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 55p. (in Japanese with English abstract 3p.)
• Sakamoto et al. (1984) Geology of the Nagoya-Hokubu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 64p. (in Japanese with English abstract 3p.)