Home Multi-Country Search About Admin Login
Cenozoic
Cretaceous
Jurassic
Triassic
Permian
Carboniferous
Devonian
Silurian
Ordovician
Cambrian
Neoproterozoic
Mesoproterozoic

Search by
Select Region(s) to search
Hold Ctrl (Windows/Linux) or Command (Mac) to select multiple
Cuijiatun Formation
Click to display on map of the Ancient World at:
Cuijiatun Fm base reconstruction

Cuijiatun Fm

Period: 
Neoproterozoic

Age Interval: 
Sinian (Ediacaran), Z （25）


Province: 
Liaoning

Type Locality and Naming

Southern peninsula of Liaoning. The Cuijiatun Fm was named by Yu Jianzhang et al. in 1964. The typical section is located in Cuijiatun, Jinxian County, Liaoning Province.

[Figure: The column of the Cuijiatun Fm. of the Liaoning peninsula. Photos are stromatolite occurrences in the Cuijiatun Fm.]

Synonym: （崔家屯组）


Lithology and Thickness

The Cuijiatun Fm is dominantly composed of light gray to greenish gray silty shale, greenish gray to purple thin-bedded silty shale, glauconite siltstone and stromatolite-bearing limestone, which belongs to the platform slope facies. Its total thickness varies from 86 to 118 m.


Lithology Pattern: 
Claystone


Relationships and Distribution

Lower contact

With a layer of thick-bedded siltstone, the basal part overlies conformably the underlying Majiatun Fm

Upper contact

The top part, a layer of greenish gray silty shale, is bounded by the overlying Zhoujiawaizi Fm

Regional extent

Southern peninsula of Liaoning. The Cuijiatun Fm is dominantly exposed in Jinxian area and piecemeal exposed in Fuzhou area, of which the limestone intercalations are unstable. In Qipanmo section of Dalian, the stromatolite limestone occurs in the upper part, but in Beishan area, it occurs in the lower part, showing as lenticules.


GeoJSON

{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[121.9,39.13],[122.28,39.17],[122.27,39.08],[122.17,38.85],[121.94,38.55],[121.58,38.34],[121.12,38.19],[120.73,38.36],[121,38.81],[121.45,39.03],[121.9,39.13]]]]}}

Fossils

This formation yields stromatolites: Cuijiatunia cuijiatunensis, Patomia qidingshanensis, Katauia changdaoensis, Hunjiangia jinxianensis etc. Microplants: Macroptycha cf. minuta, Monotrematosphaeridium adperum, Hubeisphaera radiata, Pseudodiacrodium uerticale, Leiofusa sp., Leiopsophosphaera infriata, L. legumeniformis, Dictyosphaera macroreticu lata, Trachysphaeridium rude, T. rugosum, T. incrassatum, Micrhystridium sp. Quadratimorpha jugata, Pseudo zonosphaera aff. sinica etc.


Age 

Upper (7 of 8) in a succession of eight formations spanning early through middle Sinian (early through middle Ediacaran) formations according to assigned "Z" code and schematic stratigraphic column.

Age Span: 

    Beginning stage: 
Ediacaran

    Fraction up in beginning stage: 
0.6

    Beginning date (Ma): 
577.28

    Ending stage: 
Ediacaran

    Fraction up in the ending stage: 
0.7

    Ending date (Ma):  
567.66

Depositional setting

It belongs to the platform slope facies


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.