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Qishan Formation

Qishan Fm

Period: 
Carboniferous

Age Interval: 
C12 (8), early Late Carboniferous


Province: 
Xinjiang

Type Locality and Naming

The type section is located about 28 km northeast of Qishan Mt., Kanggutager, Xinjiang. It was named by Ding Taoquan et al. in 1988.

Synonym: Qi'eshan Fm


Lithology and Thickness

Volcanics, Sandstones and Limestone. Dominated by dark-gray to gray-green pebbly crystal-lithic tuff, altered basalt, calcareous sandstone, clayey limestone, sandy limestone, clayey siltstone, etc. Exposed thickness 905.2 m.


Lithology Pattern: 
Volcanic ash


Relationships and Distribution

Lower contact

Unconformable contact with the underlying Dananhu Fm

Upper contact

Unconformable contact with the overlying Aqikebulak Fm

Regional extent

Distributed on the south margin of the Hami basin and the marginal north slope area of Qoltag


GeoJSON

null

Fossils

Containing Angara Flora Angaropteridium cardiopteroides and Lepidodendron sp.


Age 

early Late Carboniferous

Age Span: 

    Beginning stage: 
Bashkirian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
323.40

    Ending stage: 
Bashkirian

    Fraction up in the ending stage: 
0.25

    Ending date (Ma):  
321.34

Depositional setting

It is interpreted as flora-bearing continental clastic and carbonate sediments


Depositional pattern:  


Additional Information


Compiler:  

Zhang Zixin