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Koyamada Formation

• Coherent formation
• Pleistocene

• Sedimentary facies: Marine
• Lithofacies: Sandstone, Conglomerate, Siltstone

• Upper limit: Unconformity (Kakuto Pyroclastic Flow Deposit)
• Lower limit: Unconformity (Shimokado Pyroclastic Flow Deposit, Kogashira Formation, Keno Pyroclastic Flow Deposit)

• Distribution: Kagoshima pref.
• Fossils (Bivalves): Dosinia sp., Cyclina sp.

• Uchimura et al. (2014) Jour. Geol. Soc. Japan, vol.120, Supplement, pp.127-153 DOI