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Shangruya Formation

Shangruya Fm

Period: 
Carboniferous

Age Interval: 
C21 (48, 49), late Early Carboniferous


Province: 
Guizhou

Type Locality and Naming

The type section is on the highway from 2 km east of Sanglangniuyan Village to Ruyakou, Wangmo County, Guizhou. It was named by Xiong Jianfei et al. in 1983.


Lithology and Thickness

Limestone. Dark-gray or light-gray moderately thick-bedded sparite bioclastic limestone and calcarenite, occasionally intercalated with chert lamellas and lumps; ~300 m thick.


Lithology Pattern: 
Limestone


Relationships and Distribution

Lower contact

Conformable contact with the underlying Xiaruya Fm.

Upper contact

Conformable contact with the overlying light-gray calcarenite and bioclastic limestone (of Xiaolangfengguan Fm?) which yield conodonts Idiognathodus, etc. and fusulinid Pseudostaffella.

Regional extent

Coeval with upper Lingun Fm of more shallow-water facies


GeoJSON

null

Fossils

Contains Conodont faunas of the Gnathodus semiglaber and G. bilineatus bilineatus zones


Age 

late Early Carboniferous

Age Span: 

    Beginning stage: 
Visean

    Fraction up in beginning stage: 
0.15

    Beginning date (Ma): 
344.27

    Ending stage: 
Serpukhovian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
323.40

Depositional setting

It is interpreted as a deep-water shelf slope facies


Depositional pattern:  


Additional Information


Compiler:  

Wang Hongdi