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Zhuogedong Formation
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Zhuogedong Fm base reconstruction

Zhuogedong Fm

Period: 
Devonian

Age Interval: 
D31 (32), (early Late Devonian)


Province: 
Xizang (Tibet)

Type Locality and Naming

The type section is located at Zhuogedong of Xiao Banda region, Mangkang County of Tibet Zhang Autonomous Region. It was named by Third Geological Team of Sichuan in 1972 and published by Sichuan Geological Survey and Nanjing Institute of Geology and Paleontology in 1982.


Lithology and Thickness

Dolomitic limestone. The Formation consists of gray to light-gray thin- to massive-bedded dolomitic limestone, clayey limestone and dolomite. The thickness ranges from 218 to 570 m.


Lithology Pattern: 
Dolomitic limestone


Relationships and Distribution

Lower contact

The formation rests conformably on the Dingzhonglong Fm.

Upper contact

The formation is overlain by the Qiangge Fm.

Regional extent

This Formation is distributed at Jiaseding, Haitong and Bagong of Mangkang County, and at Jiangda and Duojiban of Yanjin County.


GeoJSON

{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[98.7,30.5],[98.3,29.5],[98.9,28.7],[99,29.9],[98.7,30.5]]]]}}

Fossils

It contains brachiopods Cyrtospirifer sinensis, Tenticospirifer tenticulum, Hypothyridina hunanensis, and corals, stromatoporoids and bivalves.


Age 

(early Late Devonian)

Age Span: 
S

    Beginning stage: 
Frasnian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
378.90

    Ending stage: 
Frasnian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
371.10

Depositional setting


Depositional pattern:  


Additional Information


Compiler:  

(Xian Shiyuan)