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Kannodai Formation

• Coherent formation
• Akakura caldera fill
• Pleistocene

• Sedimentary facies: Lacustrine, Caldera lake
• Sedimentary facies (Upper): Basin plain
• Sedimentary facies (Upper): Low-density turbidity current deposit, Suspension fallout deposit
• Sedimentary facies (Middle): Slope apron
• Sedimentary facies (Middle): Turbidity current deposit, Debris-avalanche flow deposit by caldera slope failures
• Lithofacies (Upper): Mudstone, Pumice lapilli tuff
• Lithofacies (Middle): Interbedded sandstone and mudstone, Tuff breccia, Pumice lapilli tuff
• Lithofacies (Lower): Breccia, Sandstone
• Sedimentary structures (Middle): Slump structures

• Thickness (Upper): 100 - 150 m
• Thickness (Middle): 250 - 300 m
• Thickness (Lower): 200 - 250 m
• Upper limit: Unconformity (Hitohane Formation, Nakayamadaira Caldera Fill Deposit)
• Lower limit: Unconformity (Ohayama Formation)

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

• Distribution: Kurikoma area, Yamagara pref. - Miyagi pref.
• Fossils: Plant fossils

• Otake (2007) Jour. Geol. Soc. Japan, vol.113, no.11, pp.549-564 DOI