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Moribu Formation

Moribu Fm


Period: 
Permian

Age Interval: 
Middle Permian (Roadian), (19b)


Province: 
Hida Gaien Belt- Fukuji-Takayama area

Type Locality and Naming

Fukuji—Takayama area (a) is the type locality of this belt (Tsukada et al., 2004).

Synonym:


Lithology and Thickness

Clastic rocks with felsic tuffaceous rocks and limestone

[Figure 1: Stratigraphic relationship among the rocks of the Hida Gaien Belt (after M. Ehiro et al., 2016)]

[Figure 2: A columnar section of the Muribu and Fukuji successions showing their major lithologies and characteristic layers and blocks (after M. Ehiro et al., 2016)]


Lithology Pattern: 
Coarse clastics


Relationships and Distribution

Lower contact

Unconformably overlying the Arakigawa Fm

Upper contact

Regionally, the schematic strat column indicates the next younger unit as Funatsu Granite Fm

Regional extent

Hida Gaien Belt- Fukuji-Takayama area (a)


GeoJSON

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Fossils

It yields Middle Permian brachiopods and fusulinoideans with recycled Lower Permian fusulinoideans in its lowermost horizon (Fujimoto et a1., 1962; Horikoshi et al., 1987; Tazawa et al., 1993; Niwa et a1., 2004).


Age 

Middle Permian (Roadian)

Age Span: 

    Beginning stage: 
Roadian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
274.37

    Ending stage: 
Roadian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
269.21

Depositional setting


Depositional pattern:  


Additional Information


Compiler:  

Moreno, T., WALLIS, S., Kojima, T. & Gibbons, W. (Eds) 2016. The Geology of Japan. Geological Society. London. 1-24.