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Koriyama Formation (Minato and Utada, 1967) Uchimura et al., 2007

• Coherent formation
• Pliocene

• Sedimentary facies: Lacustrine

• Upper limit: Unconformity (Raku Andesite, Iwashita Andesites)
• Lower limit: Unconformity (Kiyoura Andesite)

------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown

• Distribution: Hiwaki town - Iriki town, Satsumasendai city, Kagoshima pref.; Koriyama town, Kagoshima city, Kagoshima pref.; Nishisata town, Kagoshima city, Kagoshima pref.

• Uchimura et al. (2014) Jour. Geol. Soc. Japan, vol.120, Supplement, pp.127-153 DOI
• Uchimura et al. (2007) Jour. Geol. Soc. Japan, vol.113, no.3, pp.95-112 DOI