Akaiwa Subgroup

Type locality: Akaiwa, Hakusan city, Ishikawa prefecture
Coherent formation
Early Cretaceous
Correlation: Tochio Formation

Sedimentary facies: Terrestrial

Upper limit: Unconformity (Omichidani Formation)

Akaiwa Subgroup (Ishikawa pref. - Fukui pref.)
[ Upper ]
~~~~~~~~~~~~~~
Kitadani Formation
--------------
Akaiwa Formation
--------------
[ Lower ]

Akaiwa Subgroup (Ono, Fukui pref.)
[ Upper ]
~~~~~~~~~~~~~~
Nochino Conglomerate Member
~~~~~~~~~~~~~~
[ Lower ]

Tetori Group
[ Upper ]
~~~~~~~~~~~~~~
Akaiwa Subgroup
--------------
Itoshiro Subgroup
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Hakusan city, Ishikawa pref.
Fossils (Upper): Kitadani flora, Tamodani flora
Fossils (Lower): Akaiwa flora
Fossils (Footprints, Theropods): Byakudansauropus shiraminensis
Fossils (Footprints, Ornithopods): Caririchnium sp.

Sakai et al. (2018) Jour. Geol. Soc. Japan, vol.124, no.3, pp.171-189 DOI
Hirasawa et al. (2010) Jour. Geol. Soc. Japan, vol.116, Supplement, pp.103-121 DOI
Nozawa et al. (1975) Geology of the Hida-Furukawa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 79p. (in Japanese with English abstract 9p.)
Kawai et al. (1957) Arashimadake, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 110p. (in Japanese with English abstract 13p.)