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

Bancheng Fm

Period: 
Carboniferous, Permian

Age Interval: 
C1-P2 (96), late Carboniferous-early Permian


Province: 
Guangxi

Type Locality and Naming

The type section is located at Tianche in the vicinity of Bancheng area, Qinzhou City, Guangxi Zhuang Autonomous Region (108°40′, 22°18′). It was named by Zhong Keng et al., in 1992.


Lithology and Thickness

Chert. Grey-yellow and brown-grey thin-bedded chert, siliceous shale and siltstone.


Lithology Pattern: 
Chert


Relationships and Distribution

Lower contact

Disconformable contact with the underlying Shijia Fm of the Devonian System, with the disappearance of dark-grey cherts from the Shijia Fm and with the occurrence of grey-yellow cherts in the Bancheng Fm serving as a boundary between them.

Upper contact

Unconformable contact with the overlying Pengjiu Fm.

Regional extent

This formation is distributed mainly in the Lingshan, Qinzhou and Fangcheng areas.


GeoJSON

{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[109.51,21.59],[109.48,21.54],[109.35,21.52],[109.23,21.56],[109.17,21.62],[109.08,21.65],[109,21.71],[108.91,21.78],[108.77,21.81],[108.63,21.89],[108.56,22],[108.48,22.12],[108.47,22.21],[108.47,22.33],[108.46,22.45],[108.52,22.6],[108.7,22.67],[108.82,22.71],[108.94,22.65],[109.04,22.57],[109.19,22.34],[109.33,22.09],[109.46,21.71],[109.53,21.62],[109.51,21.59]]]]}}

Fossils


Age 

No details given.

Age Span: 

    Beginning stage: 
Tournaisian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
359.30

    Ending stage: 
Wordian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
264.34

Depositional setting

It is interpreted as deep-sea deposits.


Depositional pattern:  


Additional Information


Compiler:  

Yin Bao’an

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