Momonoki Formation

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Momonoki Formation Katayama, 1939

Coherent formation
Late Triassic, middle Carnian

Sedimentary facies: Fluvial, Lacustrine
Sedimentary facies: Delta
Lithofacies: Conglomerate, Sandstone, Mudstone, Coal
Lithofacies: Conglomerate includes igneous rocks. Limestone is not included.
Paleocurrent: from North-northeast

Thickness: ca. 1,000 m
Upper limit: Conformity (Asou Formation)
Lower limit: Disconformity (Hirabara Formation)

Mine Group (Omine, Yamaguchi pref.)
[ Upper ]
?--?--?--?--?-
Asou Formation
--------------
Momonoki Formation
~~~~~~~~~~~~~~
Hirabara Formation
~~~~~~~~~~~~~~
[ Lower ]

Mine Group (Asa, Yamaguchi pref.)
[ Upper ]
?--?--?--?--?-
Kamoshiro Formation
--------------
Yamanoi Formation
--------------
Nakatsuka Formation
--------------
Idekami Formation
--------------
Hiramatsu Formation
?--?--?--?--?-
[ Lower ]

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

Distribution: Momonoki, Mine city, Yamaguchi pref.
Fossils: Fishes
Fossils (Plants): Cladophlebis sp., Podozamites sp., Nagatostrobus sp., Neocalamites, Baiera, Dictyophyllum
Fossils (Insects): order Coleoptera, order Blattodea, order Hemiptera, order Orthoptera, order Hymenoptera, order Odonata
Deposit: Omine coal field

Maeda and Oyama (2019) Jour. Geol. Soc. Japan, vol.125, no.8, pp.585-594 DOI