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Kitajima Formation

Penetration resistance value (N value) is more than 50

• Coherent formation
• Pleistocene
• Correlation: Kotogawa Formation, Sakaide Formation
• Correlation (Upper): Kawauchi Formation, Shigenobugawa Formation

• Sedimentary facies (Mud): Marine
• Sedimentary facies (Sandy gravels): Fluvial
• Lithofacies: Sandy gravels, Muds (3 beds)

• Upper limit: Conformity (Tokushima Formation)
• Upper limit: Penetration resistance value (N value) = 50

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

• Distribution: Tokushima plain, Tokushima pref.
• Fossils: Phacosoma sp., Ostracods (Bicornucythere bisanensis), Echinoids
• Tephra: Sanbe-Ukinuno Tephra (SUK, 21 - 20 ka), AT

• Kawamura and Nishiyama (2019) Jour. Geol. Soc. Japan, vol.125, no.1, pp.87-105 DOI