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Chiran Formation

Invalid synonym: Kawanabe Group, Chiran Formation

• Coherent formation
• Cretaceous Albian - Cenomanian (Radiolarians)

• Sedimentary facies: Marine
• Lithofacies: Sandstone, Mudstone, Interbedded sandstone and mudstone

• Upper limit: Unknown
• Lower limit: Unknown (Saiki Subgroup)

• Distribution: Yaseo, Minamikyushu city, Kagoshima pref.
• Fossils: Radiolarians

• Saito and Nakagawa (2014) Jour. Geol. Soc. Japan, vol.120, no.3, pp.105-114 DOI