Nakatsugawa Formation

Coherent formation
Tethys ocean
Late Jurassic, middle Kimmeridgian - early Tithonian (Ammonoids)

Sedimentary facies: Marine
Climate: Tropical - Subtropical (Rudist bivalves)

Lithofacies: Conglomerate, Sandstone, Interbedded sandstone and mudstone, Torinosu Limestone

Imaidani Group
[ Upper ]
?--?--?--?--?-
Nakatsugawa Formation
?--?--?--?--?-
Oriai Formation
?--?--?--?--?-
[ Lower ]

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

Distribution: Seiyo city, Ehime pref.
Fossils: Ammonoids (Hybonoticeras sp.), Bivalves

Sano et al. (2007) Jour. Geol. Soc. Japan, vol.113, no.9, pp.500-503 DOI