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Kurisaka Formation

• Accretionary complex
• Late Jurassic, Kimmeridgian (Ammonoids, Radiolarians)

• Sedimentary facies: Marine
• Lithofacies: Silty mudstone
• Lithofacies (Minor): Interbedded sandstone and mudstone

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

• Distribution: Sakashu, Naga city, Naga county, Tokushima pref.
• Fossils: Ammonoids (Ataxioceras kurisakaense), Bivalves, Radiolarians

• Hara et al. (2014) Geology of the Kitagawa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 72p. (in Japanese with English abstract 4p.)
• Ishida (2007) Jour. Geol. Soc. Japan, vol.113, no.3, pp.83-94 DOI