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Sandaohe Gr
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Sandaohe Gr base reconstruction

Sandaohe Gr

Period: 
Cretaceous

Age Interval: 
Late Cretaceous, K2sG, (40)


Province: 
Guizhou

Type Locality and Naming

Guihou – west. The Sandaohe Formation was erected by the Guizhou Bureau of Geology and Mineral Resources in 1987. The section for the designation is in the Niejia yard of Sandaohe of Weining of Guizhou.


Lithology and Thickness

The Sandaohe Group is composed of conglomerate and quartz sandstone. The Sandaohe Group is 131.0 m thick.


Lithology Pattern: 
Conglomerate


Relationships and Distribution

Lower contact

Its base marked by gray massive conglomerate is distinguished from the underlying Upper Permian Erqiao Fm marked by yellow massive sandstone and shows a disconformable contact with the latter.

Upper contact

Its top is not observed in the type area.

Regional extent

The present group is limited in Sandaohe of Weining of Guizhou, covering an area of 5 km2, with a thickness ranging from 131 to 154 m.


GeoJSON

{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[105.77,27.39],[105.71,27.43],[105.77,27.68],[105.99,27.97],[106.15,28.24],[106.31,28.37],[106.4,28.42],[106.53,28.46],[107.5,28.55],[107.89,28.66],[107.98,28.64],[107.81,28.33],[107.35,27.72],[106.93,27.14],[106.71,27.02],[106.29,27.14],[105.77,27.39]]]]}}

Fossils

None listed


Age 


Age Span: 

    Beginning stage: 
Aptian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
121.40

    Ending stage: 
Turonian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
89.39

Depositional setting

It belongs to piedmont-diluvial-fluvial deposition.


Depositional pattern:  


Additional Information


Compiler:  

Wan Xiaoqiao