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Chaotugou Formation

Chaotugou Fm

Period: 
Carboniferous

Age Interval: 
C11 (54), Early Carboniferous


Province: 
Inner Mongolia

Type Locality and Naming

The type section is at Chaotugou, Aohan Banner, Inner Mongolia. It was named by the No. 2 Regional Geological Survey Party of Inner Mongolia in 1956.


Lithology and Thickness

Volcanics and Volcaniclastics. It is dominated by basic and intermediate-acid volcanic lavas as well as pyroclastic rock and tuff shale, intercalated with sericite quartz schist, locally with minor limestone. Exposed thickness 2262 m.


Lithology Pattern: 
Volcanics


Relationships and Distribution

Lower contact

Unconformably overlies the Silurian System

Upper contact

Conformable with the overlying Baijiadian Fm

Regional extent

Distributed from Chaotugou to Laoxigou, Aohan Banner, Inner Mongolia, and also exposed along Hashitubeigou−Hashangou−Banshaoguo of Nanwanzi Township, Naiman Banner.


GeoJSON

null

Fossils

No fossils are found in the formation


Age 

Early Carboniferous

Age Span: 

    Beginning stage: 
Tournaisian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
359.30

    Ending stage: 
Tournaisian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
346.73

Depositional setting

It is interpreted as volcanic eruption sediments


Depositional pattern:  


Additional Information


Compiler:  

Li Wenguo