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Nakadai Formation (Hatori et al., 1962) Ueki and Sakai, 2007

Invalid synonym: Nakadai Terrace Deposits, Nakadai Terrace Gravel

• Type locality: Todoroki, Setagaya ward, Tokyo
• Coherent formation
• late Pleistocene (65 - 60 ka)
• Correlation: Musashino Terrace Deposit, Ohorigawa Terrace Deposit

• Sedimentary facies: Fluvial
• Sedimentary facies: River terrace
• Climate: Cold
• Lithofacies: Gravels
• Lithofacies (Top, Minor): Sands, Silt

• Thickness: 2 - 13 m or thicker
• Upper limit: Conformity (Musashino Loam), Unconformity (Kuromegawa Formation, Karaborigawa Formation, Tachikawa Loam)
• Lower limit: Unconformity (Imokubo Formation, Tokyo Formation, Kazusa Group, Tsurumi Formation)

• Distribution: Todoroki, Setagaya ward, Tokyo; Karabori river, Shinmei, Musashimurayama city - Akitsu town, Higashimurayama cit, Tokyo; Tsutsujigaoka, Chofu city, Tokyo; Yanasegawa river, Shiki city, Saitama pref.; Koigakubo - Mitsuya? - Tonogayato - Honda, Kokubunji city, Tokyo; Oi town, Fujimino city, Saitama pref.; Terao, Kawagoe city, Saitama pref.
• Fossils (Plants): Acer mono, Alisma canaliculatum, Alnus sp., Betula sp., Carex sp., Carpinus cordata, cf. Compositae, Corylus heterophylla, Cyperus sp., Duchesnea sp., cf. Eleocharis sp., Fagus crenata, Fragaria sp., Impatiens cf. textori, Isodon sp., Isoetes sp., Labiatae, Lycopus sp., Oxalis sp., Phellodendron amurense, Picea maximowiczii, Polygonum cf. conspicuum, Polygonum thumbergii, Potentilla sp., Prunus salicina, Quercus cf. aliena, cf. Rosaceae, Rubus sp., Scirpus sp., Viola sp., Zanthoxylum schinifolium
• Fossils (Plants, Pollen): Alnus sp., Buxus sp., Orixa sp., Picea sp., Quercus sp.

• Ueki and Sakai (2007) Geology of the Ome District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 189p. (in Japanese with English abstract 5p.)
• Nakazawa and Endo (2002) Geology of the Omiya District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 41p. (in Japanese with English abstract 3p.)
• Oka et al. (1984) Geology of the Tokyo-Seinambu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 148p. (in Japanese with English abstract 7p.)