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Kamosaki Formation Sato et al., 2022

• Type locality: Kamosaki, Akaiwa city, Okayama prefecture
• Volcanic rocks
• Late Cretaceous (ca. 81.8 Ma, U-Pb)

• Sedimentary facies: Terrestrial
• Lithofacies: Rhyolite tuff, Biotite dacite - Rhyolite welded tuff, Lapilli tuff
• Lithofacies (Minor): Biotite dacite lava

• Thickness: 120 m or thicker
• Distribution (East - West): 4.5 km
• Distribution (South - North): 6.8 km
• Lower limit: Unconformity (Omoriyama Formation, Ejiri Unit, Nibori Granite)

• Distribution: Kamosaki - Nishinaka - Iwata, Akaiwa city, Okayama pref.; Gion, Okayama 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.)