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Mengdalek Formation

Mengdalek Fm

Period: 
Carboniferous

Age Interval: 
C11 (16a), early Early Carboniferous


Province: 
Xinjiang

Type Locality and Naming

The type section is located at Mengdalek, south of Wushi County Seat, Xinjiang. It was named by Zhang Shiben et al. in 1991.


Lithology and Thickness

Conglomerate and Siltstone. Littoral clastic and carbonate rock deposits: gray massive conglomerate interbedded with purple-red and light green-gray medium- to thick-bedded siltstone, clayey sandstone as well as mudstone and nodular limestone. Exposed thickness 172 m; with minor lateral changes in lithology and thickness.


Lithology Pattern: 
Conglomerate


Relationships and Distribution

Lower contact

Unconformable contact with the underlying Lower Silurian Series

Upper contact

Conformable contact with the overlying Lower Carboniferous Kongtaiaikengou Fm

Regional extent

Distributed at the east end of Suogedangtawu of the Kalpin area


GeoJSON

null

Fossils

Minor amount of plant fragments


Age 

Defined to be early Early Carboniferous in age according to its contact relationship with the overlying and underlying strata.

Age Span: 

    Beginning stage: 
Tournaisian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
359.30

    Ending stage: 
Visean

    Fraction up in the ending stage: 
0.5

    Ending date (Ma):  
338.54

Depositional setting

It is interpreted as a littoral facies.


Depositional pattern:  


Additional Information


Compiler:  

Zhang Zixin