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

Huanglianduo Fm

Period: 
Neoproterozoic

Age Interval: 
Early Sinian (Early Ediacaran), Z (21, 22)


Province: 
Henan, Shanxi, Shaanxi

Type Locality and Naming

The Huanglianduo Fm was named by Guan Baode et al. in 1980. The typical section is situated in Jiuntidong near Xiatang Town in Lushan County, Henan Province. The reference section is located in Guguling, Changfeng County of Yexian, Henan Province.

[Figure: Type section of the Huanglianduo Fm]

Synonym: （黄连垛组）


Lithology and Thickness

The Huanglianduo Fm is dominated by light gray to grayish white dolomite with siliceous bandings and chert. The lower part is composed of sandy conglomerate interbedded with quartzite. The chert shows flat-beddings and interlayer folds with different color and syngenetic rubbles. The thickness ranges from 133 to 445 m.


Lithology Pattern: 
Dolomite


Relationships and Distribution

Lower contact

The lowermost part with light gray stable sandy conglomerate rests disconformably on the underlying Luoyukou Fm (Jixian, late Mesoproterozoic)

Upper contact

The formation is disconformably overlain either by the Dongjia Fm or by the Luoquan Fm

Regional extent

The Huanglianduo Formation is exposed in Luonan of Shaanxi Province, in Ruicheng of Shanxi Province, and in Dengfeng, Yiyang, Lingbao, Ruyang, Fangcheng, Lushan, Yexian, Wuyang and Xiping counties of Henan Province.


GeoJSON

{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[111.37,34.23],[109.57,34.24],[109.54,34.27],[109.56,34.38],[109.8,34.62],[110.1,34.73],[110.46,34.75],[110.93,34.82],[111.37,34.82],[111.74,34.75],[112.08,34.72],[112.54,34.59],[112.32,34.46],[111.86,34.31],[111.37,34.23],[107.37,34.27],[107.1,34.51],[107.28,34.53],[107.76,34.62],[108.28,34.68],[108.93,34.89],[109.66,35.07],[110.39,35.44],[110.78,35.6],[110.57,35.12],[110.08,34.75],[109.6,34.48],[109.36,34.4],[108.62,34.24],[108.12,34.21],[107.37,34.27]]]]}}

Fossils

The thick-bedded massive dolomite in upper part yields stromatolites Straticonophyton f.


Age 

Early Sinian (Early Ediacaran) on schematic stratigraphic column.

Age Span: 

    Beginning stage: 
Ediacaran

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
635.00

    Ending stage: 
Ediacaran

    Fraction up in the ending stage: 
0.25

    Ending date (Ma):  
610.95

Depositional setting


Depositional pattern:  


Additional Information


Compiler:  

Extracts from The Neoproterozoic Erathem (chapter in Stratigraphic Lexicon of China, draft of 2022) by Gao Linzhi, Ding Xiaozhong, Zhang Chuanheng, Zhang Heng.