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T₄ River Terrace Deposit

• Coherent formation
• Holocene

• Lithofacies: Gravels

• Thickness: 3 - 4 m or thinner

• Distribution: Hatanaka, Ome city, Tokyo; Hikawa, Okutama city, Nishitama county, Tokyo; Sannai - Tateya - Takao, Akiruno city, Tokyo

• Sakai (1987) Geology of the Itsukaichi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 75p. (in Japanese with English abstract 5p.)