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Dodozan Formation Sato et al., 2022

• Type locality: Osegi, Akaiwa city, Okayama prefecture
• Volcanic rocks
• Late Cretaceous (before 83 Ma)
• Intruded by: Nibori Granite

• Sedimentary facies: Terrestrial
• Sedimentary facies (Minor): Lacustrine
• Lithofacies: Hornblende biotite rhyolite lapilli tuff
• Lithofacies (Minor): Rhyolite lava, Mudstone

• Thickness: 500 m
• Distribution (East - West): 1.8 km
• Distribution (South - North): 2.0 km
• Upper limit: Unconformity (Wake Formation)
• Lower limit: Unconformity (Omoriyama Formation, Mantomi Unit)

• Distribution: Osegi - Mount Dodosan - Sawahara - Onodagawa river, Akaiwa city, Okayama pref.

• Sato et al. (2022) Geology of the Wake District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 106p. (in Japanese with English abstract 4p.)