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Chaergelahe Formation

Chaergelahe Fm

Period: 
Carboniferous

Age Interval: 
C1 (13b), Early Carboniferous


Province: 
Heilongjiang

Type Locality and Naming

The type section is located on the right bank of the Chuanheli River, Handaqi Township, Heihe City, Heilongjiang. It was named by Zhang Hairi et al. in 1977, and formally cited in Regional Geology of Heilongjiang Province in 1989.


Lithology and Thickness

Conglomerate, Sandstone and Siltstone. Lower part is formed by rhythmic sediments of yellow-brown conglomerate with lithic sandstone and silty slate. Upper part is medium−coarse lithic sandstone, gray-black siltstone and clayey slate, with wavy, slightly oblique and horizontal beddings. Thickness greater than 405 m.


Lithology Pattern: 
Coarse-grained sandstone


Relationships and Distribution

Lower contact

Conformable contact with the underlying Huadaqi Fm

Upper contact

Uncertain: top boundary is unclear. Next younger regional unit is Tangjiatun Fm volcanic ash

Regional extent

Distributed in the middle reach of the Quanyan River of Nenjiang County and reaches of the Boergeli, Xiaoheli and Chaergela rivers of Heihe City


GeoJSON

null

Fossils

NOT GIVEN


Age 

It was classified into the Middle Carboniferous when named, and attributed to the Lower Carboniferous by the compilers for Regional Geology of Heilongjiang Province.

Age Span: 

    Beginning stage: 
Visean

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
346.73

    Ending stage: 
Serpukhovian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
323.40

Depositional setting

It is interpreted as a river-deltaic facies


Depositional pattern:  


Additional Information


Compiler:  

Liu Fa