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Kuroishi Fan Deposit Iwai, 1980

• Type locality: Takadate river, Kuroishi city, Aomori prefecture
• Coherent formation
• Pleistocene

• Sedimentary facies: Terrestrial
• Lithofacies (Upper): Loam
• Lithofacies (Lower): Gravels
• Lithofacies (Lower, Minor): Silt, Sands, Lignite

• Thickness: 30 - 50 m
• Lower limit: Unknown (Hakkoda 1st-stage Pyroclastic Flow Deposit, Hakkoda 2nd-stage Pyroclastic Flow Deposit)

• Distribution: Takadate river, Kuroishi city, Aomori pref.

• Muraoka and Hase (1990) Geology of the Kuroishi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 124p. (in Japanese with English abstract 8p.)