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Bingfeng Formation
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Bingfeng Fm base reconstruction

Bingfeng Fm

Period: 
Permian

Age Interval: 
P (61), Guadalupian Epoch (Middle Permian)


Province: 
Sichuan

Type Locality and Naming

The type section is located at the Bingfeng Ridge of Zhongzaniuchang, 60 km to the southeast of the Batang County Town, Sichuan Province. It was named by the No. 3 Regional Geological Reconnainssance Party under the Geological Bureau of Sichuan Province in 1974.


Lithology and Thickness

Limestone. Light-grey to dark-grey medium-bedded limestone, oolitic limestone, basalt and a small amount of lenticular hematite ore layers. Thickness is 181.6 m


Lithology Pattern: 
Oolitic limestone


Relationships and Distribution

Lower contact

Conformable contact with the underlying Ranlang Fm.

Upper contact

Conformable contact with the overlying Chidantan Fm

Regional extent

Distributed in the Batang area of Sichuan Province and in the Zhongdian area of Yunnan Province, with its thickness of 900 m in the Zhongdian area, intercalated with tuffaceous slate.


GeoJSON

{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[99.4,30.3],[99.2,30.1],[99.3,29.6],[99.4,29.3],[99.8,29.1],[99.8,29.3],[99.6,30.3],[99.6,30.4],[99.4,30.3]]]]}}

Fossils

Fusulinida represented by Pseudodoliolina, Neoschwagerina, Verbeekina and Sumatrina.

Corals represented by Iranophyllum, Waagenophyllum, Wentzelella, etc.


Age 

Maokouan Subepoch = Guadalupian Epoch (Middle Permian)

Age Span: 

    Beginning stage: 
Roadian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
274.37

    Ending stage: 
Capitanian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
259.55

Depositional setting

It is interpreted as shallow-sea carbonate-platform deposits.


Depositional pattern:  


Additional Information


Compiler:  

Wang Yujing

GeoJSON estimate by Can Cai and Xinyi Zhang (Chengdu Univ. Tech. students)