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Baizushan Formation
Click to display on map of the Ancient World at:
Baizushan Fm base reconstruction

Baizushan Fm

Period: 
Cretaceous

Age Interval: 
Early Cretaceous, K1bs, (42d)


Province: 
Guangdong

Type Locality and Naming

The name of Baizushan Formation was given by the No712 Geological Team of Guangdong in 1958. Type Locality is at the Baizushan section in the Kaiping County (112º35', 22º19').


Lithology and Thickness

The Baizushan Formation is a group of multi-colored coarse-grained clastic and volcanic rocks. Lower part consists of conglomerate, sandstone, gravel-bearing sandstone, tuffaceous siltstone. Upper part is composed of sandy conglomerate, tuffaceous sandy conglomerate interbedded by tuff, tuffaceous siltstone, and silty shale. It is 96 to 502 m in thickness.


Lithology Pattern: 
Conglomerate


Relationships and Distribution

Lower contact

It unconformably contacts the underlying Siwangshan Fm (not in Lexicon); Regionally, the next older unit is the Gaopiing Gr volcanics of late Jurassic.

Upper contact

Conformably under the Baihedong Fm

Regional extent

The formation is distributed in the area of Guangzhou, Kaiping, Heshan and Dongwan.


GeoJSON

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Fossils

The formation yields Conchostracans Feiyunella zhejiangensis, Linhaiella longiformis, L. mirifica; Charophyte Atopochara trivolvis.


Age 

Not given on Chinese lexicon column; so put as mid-Early Cret for graphic purposes.

Age Span: 

    Beginning stage: 
Hauterivian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
132.60

    Ending stage: 
Barremian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
121.40

Depositional setting


Depositional pattern:  


Additional Information


Compiler:  

Wan Xiaoqiao