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Tatairtag Formation
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Tatairtag Fm base reconstruction

Tatairtag Fm

Period: 
Devonian

Age Interval: 
D1-2 (14), Early to Middle Devonian.


Province: 
Xinjiang

Type Locality and Naming

North Tarim Basin. The type section is located at Tatairtag, northwest of Tongguzibulong Village, northeast of Keping (Kalpin), Xinjiang. It was named by No 13 Xinjiang Geological Team in 1957 and was published by Xinjiang Compiling Group for Regional Stratigraphical Scale (1980).


Lithology and Thickness

Sandstone. The formation is dominated by dark-red fine-grained sandstone and siltstone, green mudstone and sandstone, and red sandstone and siltstone interbeds, and dark-red thin-bedded sandstone, etc., with some occurrences of micro-bedding. It is 61 m in thickness.


Lithology Pattern: 
Fine-grained sandstone


Relationships and Distribution

Lower contact

The formation is in a disconformable contact with underlying Tage Fm of Keping (Kalpin) of Silurian.

Upper contact

The formation has conformably contacts with the overlying Yimugantawu Fm.

Regional extent


GeoJSON

{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[80.88,41.35],[78.72,40.76],[76.39,40.06],[76.06,39.28],[79.38,39.52],[81.44,40.26],[82.82,41.17],[82.25,41.79],[80.88,41.35]]]]}}

Fossils

In the center area of Tage in Keping, red slate and quartz sandstone intercalated with calcareous shale yield bivalve Edmondia sp.;

in the Tage and Yinganshan area in Keping are found brachiopod Lingula sp., and gastropods Naticopsis sp., Euomphalus sp.;

in Diggings of Kanji are found plant fossil Lepidodenodropsis sp.


Age 

Early to Middle Devonian.

Age Span: 
S

    Beginning stage: 
Eifelian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
394.30

    Ending stage: 
Givetian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
378.90

Depositional setting


Depositional pattern:  


Additional Information


Compiler:  

(Wang Shitao)