Mitsuno Formation

Invalid synonym: Shiko Formation

Coherent formation
Miocene

Sedimentary facies: Marine
Lithofacies (Top): Sandstone, Mudstone
Lithofacies (Upper): Interbedded sandstone and mudstone
Lithofacies (Middle): Sandstone
Lithofacies (Lower): Interbedded sandstone and mudstone
Lithofacies (Bottom): Sandstone
Lithofacies (Bottom, Minor): Coal
Sedimentary structures (Bottom): Cross stratification, Pipe rocks

Thickness (Top): 150 m or thicker
Thickness (Upper): ca. 30 m
Thickness (Middle): 160 - 200 m
Thickness (Lower): ca. 100 m
Thickness (Bottom): 60 - 70 m
Lower limit: Transitional (Shikiya Mudstone)

Kumano Group
[ Upper ]
~~~~~~~~~~~~~~
Mitsuno Formation
--------------
Koguchi Formation
--------------
Onuma Formation
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Mie pref.; Nagai - Takada - Asari - Miwasaki - Miyai - Otokawa - Koguchi - Shiko - Kowase - Kusunokubo, Shingu city, Wakayama pref.; Iseki - Kawaseki - Nagatani - Enmanji - Kago - Kanayama -Ogurusu, Nachikatsuura city, Higashimuro county, Wakayama pref.
Fossils: Spilifer sp., Corals, Bryozoans
Fossils (Shellfishes): Aloidis cf. succincta, Anadara setoensis, Cylina lunulata, Nassarius (Hinia) simizui, Pecten sp., Striarca sp., Turritella kiiensis, Vasticardium sp.

Mizuno (1957) Nachi, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 37p. (in Japanese with English abstract 3p.)
Murayama (1954) Shingu, Atawa, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 27p. (in Japanese with English abstract 6p.)