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Qingyuangang Formation
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Qingyuangang Fm base reconstruction

Qingyuangang Fm

Period: 
Cretaceous

Age Interval: 
Late Cretaceous, (18) K2qy


Province: 
Inner Mongolia

Type Locality and Naming

Hailar Basin. The Qingyuangang Formation was named by the Second Petroleum Team in 1961. The type locality is down the borehole of Bei 4.


Lithology and Thickness

The Qingyuangang Formation is a group of pink red, gray siltstone, muddy siltstone, with intercalations of sandy conglomerate. It is about 300 m thick.


Lithology Pattern: 
Siltstone


Relationships and Distribution

Lower contact

The Qingyuangang Formation is unconformably overlying the Yimin Fm.

Upper contact

The Qingyuangang Formation is unconformably below the Huchashan Fm (Miocene).

Regional extent

It is distributed in the Hailar basin.

Fossils:

The formation yields ostracods, charophyte, spore and pollen fossils.


GeoJSON

{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[118.5,49.73],[120.55,49.47],[120.7,49.17],[120.54,48.9],[120.32,48.44],[120.08,48.04],[119.66,47.74],[119.33,47.7],[118.81,47.82],[117.79,47.97],[116.83,47.94],[116.04,47.86],[115.94,47.97],[116.33,48.44],[116.74,48.87],[117.46,49.39],[118.5,49.73]]]]}}

Fossils

The formation yields ostracods, charophyte, spore and pollen fossils.

GeoJSON: { "type": "Feature", "properties": { "id": null, "NAME": "NE Inner Mongolia (Cret. 18 hailar Basin)" }, "geometry": { "type": "MultiPolygon", "coordinates": [ [ [ [ 118.5, 49.73 ], [ 120.55, 49.47 ], [ 120.7, 49.17 ], [ 120.54, 48.9 ], [ 120.32, 48.44 ], [ 120.08, 48.04 ], [ 119.66, 47.74 ], [ 119.33, 47.7 ], [ 118.81, 47.82 ], [ 117.79, 47.97 ], [ 116.83, 47.94 ], [ 116.04, 47.86 ], [ 115.94, 47.97 ], [ 116.33, 48.44 ], [ 116.74, 48.87 ], [ 117.46, 49.39 ], [ 118.5, 49.73 ] ] ] ] } }

Fossils:

None listed


Age 

mid-Campanian to mid-Maastrichtian

Age Span: 

    Beginning stage: 
Campanian

    Fraction up in beginning stage: 
0.6

    Beginning date (Ma): 
76.76

    Ending stage: 
Maastrichtian

    Fraction up in the ending stage: 
0.6

    Ending date (Ma):  
68.49

Depositional setting


Depositional pattern:  


Additional Information


Compiler:  

Wan Xiaoqiao