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Shinzawa Formation

• Type locality: Totsuka substation, Shinzawa, Totsuka city, Totsuka ward, Yokohama city, Kanagawa prefecture
• Coherent formation
• Pleistocene
• Correlation (Upper): Fujisawa Loam

• Lithofacies (Upper): Tuffaceous mud
• Lithofacies (Upper, Minor): Pumice, Scoria
• Lithofacies (Middle): Gravel-bearing sands
• Lithofacies (Lower): Sandy mud

• Thickness: 10 m or thicker
• Thickness (Upper): ca. 3 m
• Thickness (Middle): ca. 5 m
• Thickness (Lower): ca. 2 m
• Upper limit: Unconformity (Totsuka Formation)

• Distribution: Miyanotani - Shinzawa, Totsuka city, Totsuka ward, Yokohama city, Kanagawa pref.

• Mitsunashi and Kikuchi (1982) Geology of the Yokohama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 105p. (in Japanese with English abstract 4p.)