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Kisakata Formation Ozawa et al., 1982

• Coherent formation
• Kisakata lake filling deposit
• Holocene (0.92, 0.87 ka BP, ¹⁴C)

• Sedimentary facies: Lacustrine
• Lithofacies: Sands, Silt
• Lithofacies (Minor): Mud, Clay

• Thickness: 1.0 - 18.4 m
• Distribution (East-West): ca. 1.0 km
• Distribution (South-North): ca. 5.5 km
• Upper limit: Unconformity (Younger Sand Dune Deposits)
• Lower limit: Unconformity (Nishime Formation, Older Sand Dune Deposits, Kisakata Debris Avalanche Deposits)

• Distribution: Maekawa - Kisakata town, Nikaho city, Akita pref.
• Fossils (Bivalves): Corbicula japonica, Crassostrea gigas, Cyclina sinensis, Macoma contabulata, Macoma incongrua, Meretrix lusoria, Mya (Arenomya) arenaria oonogai, Ruditapes philippinarum, Trapezium (Neotrapezium) liratum
• Fossils (Gastropods): Assiminea lutea japonica, Batillaria cumingii, Batillaria multiformis, Batillaria zonalis, Cerithideopsilla djadjariensis, Cingulina cingulata, Didontoglossa koyasuensis, Fluviocingula nipponica, Lunella coronata coreensis, Monodonta (Monodonta) labio, Reishia clavigera, Reticunassa festiva, Stenothyra edogawaensis
• Fossils (Trace fossils): Naticidae? gen. et sp. indet, Teredinidae? gen. et sp. indet

• Ozawa et al. (1982) Geology of the Kisakata District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 73p. (in Japanese with English abstract 4p.)