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Katanishi Formation (Chitani ex Ohashi, 1930) Shiraishi, 2000

Invalid synonym: Middle I Terrace Deposit

Invalid synonym (Lower part): Tsubakidai Formation

• Type locality: Honnai - Katanishi terrace, Oga city, Akita prefecture
• Coherent formation
• Pleistocene (ca. 150 - 90 ka, Shimosueyoshi marine transgression)
• Correlation: Shimosueyoshi Formation
• Correlation (Lower): Shimoshinzan Terrace Deposit

• Sedimentary facies: Marine
• Sedimentary facies: Wave-cut platform deposit
• Sedimentary facies (Top): Tidal flat, Inner bay, Longshore bar
• Sedimentary facies (Upper): Foreshore - Upper shoreface
• Sedimentary facies (Middle): Middle - lower shoreface
• Sedimentary facies (Lower): Lower shoreface - Inner continental shelf
• Sedimentary facies (Bottom): Inner - middle continental shelf
• Climate: Warm
• Lithofacies (Top): Clayey sands
• Lithofacies (Upper): Sands
• Lithofacies (Middle): Sands
• Lithofacies (Lower): Sands
• Lithofacies (Bottom): Shell-bearing silty sands
• Lithofacies (Minor): Gravels, Lignite
• Sedimentary structures: Cross stratification, Parallel stratification, Imbricate structure
• Paleocurrent: East to West

• Thickness: 5 - 80 m
• Upper limit: Unconformity, partly conformity ( Older Dune of Noshiro Coastal Dune), Unconformity (Iriai Formation, Hakoi Formation,Hashimoto Formation, Tominaga Lava)
• Lower limit: Unconformity (Shibikawa Formation, Kitaura Formation, Ishikurayama Formation, Nakazawa Formation, Sasaoka Formation, Takaoka Formation, Tentokuji Formation, Funakawa Formation, Onnagawa Formation)

------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown

• Distribution: Katanishi Terrace
• Distribution: Anden seashore, Iriai, Oga city, Akita pref.; Unoki - Honnai, Oga city, Akita pref.; Sakasagawa - Otomo pond, Noshiro city, Akita pref.; Futatsui town, Noshiro city - Fujisato city, Yamamoto county, Akita pref.; Ichinosawatsutsumi, Noshiro city, Akita pref.; Menagata, Minehama, Happo city, Yamamoto county, Akita pref.; Sarukawa - Miyazawa, Oga city, Akita pref.; Yatsuomote, Noishi, Oga city, Akita pref.; Koikawa, Mitane city, Minamiakita county, Akita pref.; Terauchi, Akita city, Akita pref.; Matsumoto, Suedo, Yotsugoya, Akita city, Akita pref.
• Fossils: Plants, Foraminifera, Trace fossils (Teredo sp.)
• Fossils (Shellfishes): Clinocardium (Fuscocardium) braunsi, Corbicula japonica, Corbicula sp., Crassostrea sp., Glycymeris yessoensis, Macoma sp., Trapezium sp., Turritella andenensis
• Fossils (Plants): Cryptomeria japonica, Fagus crenata, Juglans ailanthipolia, Larix leptolepis, Manyanthes trifoliata, Styrax obassia, Thujopsis dolabrata, Trapa bispinosa, Trapa manshurica
• Fossils (Basement, Shellfishes): Penitella kamakurensi), Barnea manilensis
• Tephra: Toya, Aso-4, ST

• Kano et al. (2011) Geology of the Toga and Funakawa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 127p. (in Japanese with English abstract 4p.)
• Shiraishi et al. (2008) Jour. Geol. Soc. Japan, vol.114, Supplement, pp.33-50 DOI
• Fujimoto et al. (2008) Jour. Geol. Soc. Japan, vol.114, Supplement, pp.51-74 DOI
• Murakami et al. (2008) Jour. Geol. Soc. Japan, vol.114, Supplement, pp.111-120 DOI
• Ozawa et al. (1985) Geology of the Ugo-Hamada District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 57p. (in Japanese with English abstract 4p.)
• Ozawa et al. (1985) Geology of the Moritake District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 69p. (in Japanese with English abstract 5p.)
• Ozawa et al. (1984) Geology of the Noshiro District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 91p. (in Japanese with English abstract 9p.)
• Huzioka et al. (1977) Geology of the Akita District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 69p. (in Japanese with English abstract 5p.)
• Huzioka et al. (1976) Geology of the Ugo-Wada District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 65p. (in Japanese with English abstract 5p.)
• Hase and Hirayama (1970) Geology of the Gojome District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 46p. (in Japanese with English abstract 6p.)