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Nawashiroda Formation

Invalid synonym: Naeshiroda Formation

• Coherent formation
• Higashidaigo basin
• middle Miocene (Foraminifera)

• Sedimentary facies: Marine
• Sedimentary facies: Inner shelf
• Lithofacies: Sandy turbidite, Sandstone-dominant interbedded sandstone and mudstone
• Lithofacies (Minor): Conglomerate
• Sedimentary structures: Parallel stratification, Graded stratification, Ripples

• Thickness: 150 - 300 m
• Lower limit: Conformity, partly Interfingered (Nantaisan Volcanic Breccia)

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

• Distribution: Daigo city, Kuji county, Ibaraki pref.
• Fossils: Echinoids, Bivalves, Foraminifera (Miogypsina kotoi)

• Hosoi et al. (2017) Jour. Geol. Soc. Japan, vol.123, no.8, pp.613-626 DOI
• Amano et al. (2011) Jour. Geol. Soc. Japan, vol.117, Supplement, pp.69-87 DOI
• Tagiri et al. (2008) Jour. Geol. Soc. Japan, vol.114, no.6, pp.300-313 DOI