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Upper Wakamiya Formation

• Coherent formation
• Early Cretaceous

• Sedimentary facies: Lacustrine

• Upper limit: Partly unconformity (Shiohama Formation)
• Lower limit: Partly unconformity (Lower Wakamiya Formation)

• Distribution: Miyata, Miyawaka city, Fukuoka pref.; Toyonishi - Utsui, Shimonoseki city, Yamaguchi pref.

• Ota et al. (2011) Jour. Geol. Soc. Japan, vol.117, no.5, pp.289-298 DOI
• Horiuchi and Hisada (2008) Jour. Geol. Soc. Japan, vol.114, no.9, pp.447-460 DOI