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Totsuka Formation Association for Kanto Quaternary research, 1973

Invalid synonym: Hodogaya Formation (Basal conglomerate)

• Type locality: Shinzawa - Miyanotani, Totsuka ward, Yokohama city, Kanagawa prefecture
• Coherent formation
• Fore-arc basin sediments (Kazusa trough)
• Pleistocene
• Correlation: Tsuchiya Formation
• Contemporaneous heterotopic facies: lower Tsuchihashi Loam

• Sedimentary facies: Marine, Freshwater
• Sedimentary facies: Inner bay
• Lithofacies: Muddy sands, Peat, Gravels
• Sedimentary structures: Cross stratification

• Thickness: 8 m or thicker
• Upper limit: Conformity (Tsuchihashi Loam), Unconformity (Shimosueyoshi Formation)
• Lower limit: Unconformity (Shinzawa Formation, Kamikurata Formation, Sannodai Loam)

• Distribution: Shinzawa - Miyanotani, Totsuka ward, Yokohama city, Kanagawa pref.; Mutsukawa - Minamiota, Minami ward, Yokohama city, Kanagawa pref.; Yamate town, Naka ward, Yokohama city, Kanagawa pref.
• Fossils: Plants
• Fossils (Shellfishes): Anadara granosa, Batillaria sp., Crassostrea gigas, Cyclina chinensis

• 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.)