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Liangfengpo Formation
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Liangfengpo Fm base reconstruction

Liangfengpo Fm

Period: 
Permian

Age Interval: 
P3 (77), Lopingian Epoch (Late Permian)


Province: 
Guizhou

Type Locality and Naming

The type section is located in the Liangfengpo area of the Tang Bianzhai region about 3 km to the west of the Qinglong County Town, Guizhou Province. It was named by Wang Yu et al., in 1963.


Lithology and Thickness

Siltstone. A suite of grey-green siltstone, intercalated with limestone lenses. Its basal part is composed of thin-bedded siltstone. Its middle and upper parts are composed of grey-green siltstones, intercalated with three layers of clayey limestone lenses. Thickness is over 26.3 m.


Lithology Pattern: 
Continental marl


Relationships and Distribution

Lower contact

Conformable contact with the underlying Xuanwei Fm

Upper contact

Conformable contact with the overlying Lower Triassic strata (Feixianguan Fm)

Regional extent

Occurs only in the naming area of the Tang Bianzhai region.


GeoJSON

{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[105.19,25.94],[105.19,25.94],[105.23,25.95],[105.25,25.95],[105.29,25.92],[105.31,25.88],[105.35,25.8],[105.39,25.76],[105.41,25.71],[105.44,25.64],[105.45,25.58],[105.45,25.5],[105.43,25.45],[105.41,25.42],[105.38,25.42],[105.34,25.48],[105.28,25.54],[105.2,25.63],[105.1,25.74],[105.11,25.82],[105.19,25.94]]]]}}

Fossils

Fusulinida such as Palaeofusulina sinensis, Nankinella sp., etc ; Brachiopods such as Pugnax pseudoutah, Avonia janus, Uncinunellina timorensis, Schelliwienella regularis, Streptorhynchus sp., etc.; and Bivalves such as Girtypecten sublaguratus, Aviculopecten cf. hellatulus, etc..


Age 

Lopingian Epoch (Late Permian)

Age Span: 

    Beginning stage: 
Changhsingian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
254.24

    Ending stage: 
Changhsingian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
251.90

Depositional setting

It is interpreted as littoral-facies deposits.


Depositional pattern:  


Additional Information


Compiler:  

Shang Qinghua

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