Miyanooku Formation

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Miyanooku Formation

Type locality: Miyanooku, Fukumoto, Mimasaka city, Okayama prefecture
Coherent formation
Middle Triassic (Shellfishes)

Sedimentary facies: Marine
Lithofacies: Sandy mudstone
Lithofacies (Minor): Sandstone

Thickness: ca. 300 m

Fukumoto Group
[ Upper ]
?--?--?--?--?-
Miyanooku Formation
--------------
Kyogakubo Formation
--------------
Kusano Formation
~~~~~~~~~~~~~~
[ Lower ]

Central zone (Okayama pref.)
[ Upper ]
/--/--/--/--/-
Nakaiso Conglomerate Bed
?--?--?--?--?-
Yanagi Formation
?--?--?--?--?-
Fukumoto 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: Miyanooku, Fukumoto, Mimasaka city, Okayama pref.
Fossils (Ammonoids): Danubites sp., Hollandites sp., Orthoceras sp.
Fossils (Shellfishes): Neobakevellia myanokuensis, Poleoneilu sp.

Takemura et al. (2009) Jour. Geol. Soc. Japan, vol.115, Supplement, pp.123-137 DOI
Mitsuno and Omori (1965) Susai, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 59p. (in Japanese with English abstract 17p.)