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Kitamata Formation Kujiraoka, 1953

• Type locality: KItamata, Sakata city, Yamagata prefecture
• Coherent formation
• Miocene
• Correlation: Funakawa Formation, Furukuchi Formation
• Correlation (Upper): Lower Noguchi Formation

• Depth of water: Bathyal (Foraminifera)
• Lithofacies: Mudstone
• Lithofacies (Minor): Acidic tuff, Tuffaceous sandstone

• Thickness: 100 - 800 m
• Upper limit: Top of Tazawa Tuff
• Upper limit: Transitional (Tateyama Formation), Unconformity (Owarabi Debris Avalanche Deposit)
• Lower limit: Transitional (Kusanagi Formation), Conformity (Aosawa Formation, Kannonji Basalt)

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

• Distribution: Kitamata - Tazawa - Kamimochiyama - Matsumine - Ennoji - Tateyama - Yamamoto, Sakata city, Yamagata pref.; Karikawa - Mount Haguro, Shonai city, Higashitagawa county, Yamagata pref.
• Fossils: Sponges (Makiyama chitanii)
• Fossils (Foraminifera): Ammodiscoides japonica, Bathysiphon sp., Cribrostomoides cf. evoluta, Cribrostomoides renzi, Cribrostomoides subglobosum, Cyclammina cancellata, Cyclammina cf. egoensis, Cyclammina japonica, Cyclammina pusilla, Dorothia sp., Globigerina spp., Globorotalia orientalis, Goesella schencki, Haplophragmoides sp., Hormorsina sp., Martinottiella bradyana tarukiensis, Martinottiella communis, Melonis pompilioides, Miliammina echigoensis, Neogloboquadrina aff. asanoi, Praeglobobulimina pupoides, Pullenia apertulla, Spirosigmoilinella compressa, Uvigerina akitaensis, Uvigerina yabei
• Fossils (Radiolarians): Actinomma miocenicum, Anthocarys akitaensis, Cenosphaera sp., Cromyodruppa concentrica, Cyrtocapsella japonica, Cyrtocapsella tetrapera, Flustrella camerica, Flustrella cf. flustrella, Larnacantha elliptica, Larnacantha polyacantha, Lychnocanium nipponicum, Sethocyrtis japonica, Spireuma circularis, Spongodiscus sp., Spongoplegma valiabilium, Spongurus inouei, Stichocorys delmontensis, Stylatractus yatsuoensis, Thecosphaera japonica, Thecosphaera miocenica, Theocyrtis redondoensis

• Tsuchiya (1989) Geology of the Osawa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 85p. (in Japanese with English abstract 6p.)
• Tsuchiya et al. (1984) Geology of the Tsuruoka District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 77p. (in Japanese with English abstract 5p.)
• Ikebe et al. (1979) Geology of the Sakata District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 42p. (in Japanese with English abstract 3p.)