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Nayixiong Formation

Nayixiong Fm


Period: 
Permian

Age Interval: 
P3 (58), Wuchiapingian Stage (early Lopingian Epoch; early Late Permian)


Province: 
Qinghai

Type Locality and Naming

The type section is located in the vicinity of the Kaixinling Coal Mine, Zhiduo County, Qinghai Province. It was named by the 2nd Regional Geological Survey Party under the Qinghai Geological Bureau in 1982-1983. Lower unit of the Wuli Gr.


Lithology and Thickness

Clastics. Sandy shale, siltstone, limestone and coal seams. Thickness is over 283.7 m.


Lithology Pattern: 
Siltstone


Relationships and Distribution

Lower contact

Uncertain contact relationship with the underlying Kaixinling Gr

Upper contact

Regional extent

Distributed in the Kaxinling and Dongmaolong areas of the Zhiduo County.


GeoJSON

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Fossils

Brachiopods such as Squamularia grandis, Oldhamina transversa, Leptodus nobilis; and Plant fossils (phytolites) represented by the Lobatannularia johorensis-Annularia pingloensis assemblage.


Age 

Wuchiapingian Stage of the Lopingian Epoch

Age Span: 

    Beginning stage: 
Wuchiapingian

    Fraction up in beginning stage: 
0.5

    Beginning date (Ma): 
256.89

    Ending stage: 
Wuchiapingian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
254.24

Depositional setting


Depositional pattern:  


Additional Information


Compiler:  

Wang Yujing