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Setagaya Formation Civil Engineering Laboratory of the Tokyo Metropolitan Government, 1996

• Type locality: underground of Kinuta, Setagaya-ku, Tokyo Metropolis
• Coherent formation
• Incised-vally fill deposit
• Pleistocene
• Correlation: lower Kioroshi Formation

• Sedimentary facies (Top): Tidal flat
• Sedimentary facies (Upper): center of bay
• Sedimentary facies (Middle): Estuary
• Sedimentary facies (Lower): Braided river in incised valley
• Climate: Intermediate-temperate forest (Pollen)
• Lithofacies: Mud
• Lithofacies (Basal): Sands and gravels, Gravelly sands, Muddy sands, Sandy mud
• Sedimentary structures: Cross stratification

• Thickness: ca. 20 m or thinner
• Upper limit: Unconformity (Tokyo Formation, Musashino Terrace Deposit)
• Lower limit: Unconformty (Kazusa Group)

• Distribution: Setagaya, Tokyo
• Fossils: Shellfishes (Magallana gigas), Burrows
• Fossils (Diatoms): Tryblionella granulata, Cyclotella cf. litoralis, Eunotia spp., Pinnularia spp., Cyclotella choctawhatcheeana, Thalassiosira spp., Thalassionema nitzschioides, Chaetoceros sp., Rhizosolenia sp., Paraliasulcata sp., Paraliasulcata fenestrata, Diploneis smithii, Giffenia cocconeiformis, Pseudopodosira kosugii
• Fossils (Upper, Pollen): Alnus sp., Hemiptelea sp., Carpinus sp., Ostrya sp., Cryptomeria sp., Quercus (Lepidobalanus) sp., Lagerstroemia sp., Melia sp., Sapinum sp., Mallotus sp.
• Fossils (Lower, Pollen): Hemiptelea sp., Quercus (Lepidobalanus) sp., Alnus sp., Carpinus sp., Ostrya sp., Quercus (Cyclobalanopsis) sp., Lagerstroemia sp., Pinus sp., Cryptomeria sp.
• Tephra: Tu-31

• Nakazawa et al. (2019) Jour. Geol. Soc. Japan, vol.125, no.5, pp.367-385 DOI