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Senninzuka Formation
Type locality: Choshi city, Chiba prefecture
Coherent formation
early Miocene
Upper limit: Unconformity (
Meotogahana Formation
)
Lower limit: Unconformity (
Nagasakihana Formation
)
Distribution: Choshi city, Chiba pref.
Kashiwagi et al. (2013) Jour. Geol. Soc. Japan, vol.119, no.9, pp.647-652
DOI