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Kyoraishi Formation

• Coherent formation
• Pleistocene

• Sedimentary facies: Montane zone (1,000 - 1,500 m elevation, Plant fossils)
• Lithofacies: Sands, Gravels
• Lithofacies (Minor): Mud, Peat
• Sedimentary structures (Minor): Cross stratification

• Thickness: 16 m
• Thickness: 2- 3 m
• Upper limit: Unconformity (Nirasaki Debris Avalanche Deposit)
• Lower limit: Unconformity (Ojirogawa Mudflow Deposit, Momonoki Subgroup)

• Distribution: Kamanashi river, Matsubara - Kokkai bridge - Hanaimizu, Hakushu town, Hokuto city, Yamanashi pref.; Omukawa river, Hakushu town, Hokuto city, Yamanashi pref.
• Fossils (Peat): Fagus crenata, Picea cf. bicolor, Magnolia obovata (Cones), Picea jezoensis, Picea maximowiczii (Cones)

• Kawachi (1977) Geology of the Yatsugatake District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 92p. (in Japanese with English abstract 4p.)