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Hiketa Formation

• Coherent formation
• Izumi sedimentary basin
• Forearc basin associated with strike-slip fault related to Median Tectonic Line
• Late Cretaceous, Campanian (Ammonoids, Paleomagnetism)

• Sedimentary facies: Northern margin of the sedimentary basin
• Sedimentary facies: non-Turbidite
• Depth of water: Outer shelf
• Lithofacies: Shale

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

• Distribution: Doki river, Manno city, Nakatado county, Kagawa pref.; Hiketa, Higashikagawa city, Kagawa pref.
• Fossils: Portlandia sp., Thyasira sp., Periplomya sp.

• Yoshikawa et al. (2011) Jour. Geol. Soc. Japan, vol.117, no.9, pp.523-537 DOI