N<sub>2</sub> Formation

N₂ Formation

Coherent formation
late Triassic, Carnian

Sedimentary facies: Shallow marine
Lithofacies: Sandstone
Lithofacies (Minor): Sandy shale, Shale, Conglomerate

Thickness: 180 - 350 m or thinner
Upper limit: Conformity (N₃ Formation)
Lower limit: Conformity (N₁ Formation), Unconformity (Arakura Formation)

Nabae Group (Nabae, Fukui pref.)
[ Upper ]
--------------
N₄ Formation
--------------
N₃ Formation
--------------
N₂ Formation
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N₁ Formation
--------------
[ Lower ]

Central zone (Kyoto - Hyogo)
[ Upper ]
/--/--/--/--/-
Nabae Group
?--?--?--?--?-
Yakuno Group
~~~~~~~~~~~~~~
Maizuru Group
/--/--/--/--/-
[ Lower ]

Maizuru Belt
[ North ]
/--/--/--/--/-
North zone
/--/--/--/--/-
Central zone
/--/--/--/--/-
South zone
/--/--/--/--/-
[ South ]

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

Distribution: Nabae, Takahama city, Oi county, Fukui pref.; Arakura - Shikahara, Maizuru city, Kyoto pref.
Fossils (Shellfishes): Bakevellia matsushitai, Bakevellia monobensis, Bakevellia oyogiensis, Cardinia triadica, Chlamys mojsisovicsi, Cuspidaria ayabensis, Homomya matsuoensis, Lima (Pseudolimea) naumanni, Lima Yataensis, Lima yataensis var. kuredaniensis, Minetrigonia katayamai, Minetrigonia hegiensis obsoleta, Neoschizodus kawarensis, Ostrea sp., Oxytoma sp., Palaeopharus maizurensis, Parallelodon monobensis, Pleurotomaria? sp., Plicatula hekiensis, Schafhäutria sp., Spiriferina kawarensis, Velata maizurensis

Igi et al. (1961) Maizuru, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 49p. (in Japanese with English abstract 9p.)
Hirokawa et al. (1958) Obama, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 31p. (in Japanese with English abstract 8p.)