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Jike Formation (Watabe et al., 1952) Mikami, 1955
Invalid synonym: Jike Formation
- Type locality: Yataro river, Jike, Susugaya, Kiyokawa city, Aiko county, Kanagawa prefecture
- Type locality (Submerged): Hayato river, Miyagase, Kiyokawa city, Aiko county, Kanagawa prefecture
- Coherent formation
- Trough-fill deposit at the collision boundary between Oceanic arc of Paleo-Izu-Bonin arc (Ocean crust) and Honshu arc (Island arc)
- Susugaya Trough deposit
- Late Miocene (8.0 - 5.8 Ma; 7.46 Ma, FT; Calcareous nannofossils)
- Sedimentary facies: Marine
- Sedimentary facies: Continental slope
- Sedimentary facies: Ocean side trough slope deposit
- Metamorphic facies: Prehnite-Pumpellyite
- Depth of water: Bathyal near sublittoral zone
- Lithofacies: Siltstone
- Lithofacies (Minor): Conglomerate, Andesite -dacite volcanic sandstone, Dacite tuff, Lapilli tuff, Tuff breccia Basalt - Andesite volcanic breccia
- Paleocurrent: Northeast to Southwest
- Thickness: 200 - 500 m or thicker
- Upper limit: Conformity, partly unconformity (Ochiai Formation)
- Lower limit: Conformity, partly unconformity (Yataro Formation)
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Jike - Shimohara - Horindo - Bessho, Susugaya, Kiyokawa city, Aiko county, Kanagawa pref.; Hayato river - Lake Miyagase, Miyagase, Kiyokawa city, Aiko county, Kanagawa pref.
- Fossils: Corals (Flabellum sp.), Plant fragments
- Fossils (Shellfishes): Chlamys kaneharai, Dentalium yokoyamai, Lucina sp., Nassarius sp., Siphonalia sp., Solemya tokunagai, Thyasira sp.
- Fossils (Foraminifera): Cyclamina incisa, Globigerina sp.
- Fossils (Calcareous nannofossils): Discoaster berggrenii, Discoaster quinqueramus
- Ishikawa et al. (2016) Jour. Geol. Soc. Japan, vol.122, no.7, pp.291-304, DOI
- Ueki et al. (2013) Geology of the Hachioji District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 137p. (in Japanese with English abstract 6p.)
- Matsubara and Amano (2010) Jour. Geol. Soc. Japan, vol.116, no.3, pp.134-150 DOI
- Oka et al. (1979) Geology of the Fujisawa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 111p. (in Japanese with English abstract 5p.)