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Waruishi Formation
- Sedimentary facies: Marine
- Lithofacies (Upper): Shale
- Lithofacies (Lower): Shale
- Sedimentary structures (Lower): Parallel stratification
- Thickness (Upper): 160 m or thicker
- Thickness (Lower): 120 m or thicker
- Lower limit: Conformity (Honodani Formation)
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Kyoto pref.
- Fossils (Ammonoids): Danubites sp., Hollandites sp.
- Kobayashi (2008) Jour. Geol. Soc. Japan, vol.114, no.2, pp.80-87 DOI
- Kurimoto and Makimoto (1990) Geology of the Fukuchiyama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 97p. (in Japanese with English abstract 5p.)
- Igi and Kuroda (1965) Oeyama, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 81p. (in Japanese with English abstract 12p.)