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Bilong Formation
Click to display on map of the Ancient World at:
Bilong Fm base reconstruction

Bilong Fm


Period: 
Permian

Age Interval: 
P1 (54b), Cisuralian Epoch (Early Permian)


Province: 
Xizang (Tibet)

Type Locality and Naming

The type section is located in a belt extending from the east of the Kangma County Town to the Baidingpu area, Tibet. It was named by Zhang Binggao in 1974.


Lithology and Thickness

Sandstone: Light-grey quartz-sandstone. Thickness is about 30 m.


Lithology Pattern: 
Sandstone


Relationships and Distribution

Lower contact

Conformable contact with the underlying Kewoxige Fm.

Upper contact

Next younger regional unit is the Kangma Fm.

Regional extent

Distributed in the area of Kangma County


GeoJSON

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Fossils

Brachiopods as represented by the Stepanoviella fauna and simple Coral such as the Pleramplexus, whose features are similar to those faunas found in the Jilong Fm of Dingri area and in the Pangduo Gr of the Lhasa area.


Age 

Early Permian Epoch, but details are not given.

Age Span: 

    Beginning stage: 
Artinskian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
290.51

    Ending stage: 
Artinskian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
283.30

Depositional setting

It is interpreted as a


Depositional pattern:  


Additional Information


Compiler:  

Wang Yujing

GeoJSON estimate by Longgang Ye and Yuyin Li (Chengdu Univ. Tech. students)