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

Mangcuo Fm

Period: 
Permian

Age Interval: 
P (60), Kungurian Stage (late-Cisuralian Epoch; late-Early Permian)


Province: 
Xizang (Tibet), Qinghai, Sichuan

Type Locality and Naming

The type section is located on the western side of the Xiaobangdamangco to the southeast of the Mongkang County, Tibet. It was named by the 3rd Regional Geological Reconnaissance Party under the Bureau of Geology and Mineral Resources of Sichuan Province in 1974.


Lithology and Thickness

Limestone. Composed of light-grey and grey-white medium- and thick-bedded limestones and crystal-clastic tuffs, with a thickness of 350 m.


Lithology Pattern: 
Limestone


Relationships and Distribution

Lower contact

Disconformable contact with the underlying Lizha Fm or its coeval Ebana Fm

Upper contact

Conformable below Tyokar Fm

Regional extent

Distributed in the areas of the Mongkang County, Chando Region, Leiniaoqi County and Batang County of western Sichuan Province; and in the area of the Angqian County, Qinghai Province, with a fairly great change in its thickness, as being of 305 m in the Xiaobangdamangco of the Mongkang County; of 151.8 m in the Xiaobangdadina area; of 39 m in the Gangzhuoyong of the Angqian County of Qinghai Province; of 164 m in the area of the Lunzhuosi Temple of the Leiniaoqi County; of over 80 m in the Anba area of the Chando Region; and of 1397 m in the Erarqin area of the Batang County.


GeoJSON

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Fossils

Abundant marine animal fossils, including Fusulinida represented by Parafusulina, Misellina, Toriyamaia, Yangchienia, Pseudofusulina and Schwagerina; Corals such as Szechuanophyllum, Lophophyllidium and Yatsengia; as well as Ammonoids such as Popanoceras, etc.,


Age 

Qixia’an Subepoch of the Yangsingian Epoch = Kungurian Stage (late-Cisuralian Epoch; late-Early Permian)

Age Span: 

    Beginning stage: 
Kungurian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
283.30

    Ending stage: 
Kungurian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
274.37

Depositional setting


Depositional pattern:  


Additional Information


Compiler:  

Wang Yujing

GeoJSON estimate by Longgang Ye and Yuyin Li (Chengdu Univ. Tech. students)