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Muhua Formation

Muhua Fm

Period: 
Carboniferous

Age Interval: 
C11 (48), early Early Carboniferous


Province: 
Guizhou

Type Locality and Naming

The type section is located at Muhua Village, Changshun, Guizhou. It was named by Xiong Jianfei in 1983.


Lithology and Thickness

Clayey Limestone. Black and gray-black moderately thick-bedded and thin-bedded clayey limestone, with clayey matter between the layers. With laminated structure well developed, and grain size grading, it is formed by deposits formed by low-density flows, thickness 13.64 m.


Lithology Pattern: 
Clayey limestone


Relationships and Distribution

Lower contact

Conformable contact with the underlying Wangyou Fm.

Upper contact

Conformable contact with the overlying Dawuba Fm

Regional extent

Widely distributed in the Pu’an-Mawei subarea, and best exposed along Wangyou of Huishui to Muhua of Changshun.


GeoJSON

null

Fossils

The lower part of the formation roughly corresponds to the upper part of the conodont Siphonodella crinulata zone.


Age 

early Early Carboniferous

Age Span: 

    Beginning stage: 
Tournaisian

    Fraction up in beginning stage: 
0.2

    Beginning date (Ma): 
356.79

    Ending stage: 
Tournaisian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
346.73

Depositional setting

It is interpreted as platform margin slope facies with calcareous turbidites.


Depositional pattern:  


Additional Information


Compiler:  

Wang Hongdi