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Jipuria Formation
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Jipuria Fm base reconstruction

Jipuria Fm

Period: 
Permian

Age Interval: 
P3 (47), Changhsingian Stage of the Lopingian Epoch


Province: 
Xizang (Tibet)

Type Locality and Naming

The type section is located at Jipuria about 10 km to the northeast of the Jipu Village, Duoma Region, Ritu County, Tibet. It was named by Liang Dingyi et al., in 1982.

Synonym: Jipuria Gr


Lithology and Thickness

Sandstone and Limestone. It is divisible into two parts: Lower part is composed of conglomerate, calcareous sandstone and sandy limestone, with a thickness of 650 m. Upper part consists of grey stratified cherty banded limestone, dolomitic limestone and dolomite, with a thickness of 500 m, yielding coral and Fusulinida fossils. Total thickness is 1150 m.


Lithology Pattern: 
Sandy limestone


Relationships and Distribution

Lower contact

Unconformable contact with the underlying Tunlonggongba Fm or Longge Fm

Upper contact

Conformably overlain by Oula Fm of early Triassic

Regional extent

Distributed in the areas of Tuotala, Duoldong Mt. and Rehepan, Duoma Region, Ritu County, Tibet.


GeoJSON

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Fossils

Lower part yields a small amount of brachiopods and fragments of crinoidal stems.

Upper part has Fusulinida fossils represented by Palaeofusulina, Codonofusiella, Reichelina, and Sphaerulina; and Coral fossils such as Huayunophyllum, Waagenophyllum.


Age 

Changhsingian Stage of the Lopingian Series.

Age Span: 

    Beginning stage: 
Changhsingian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
254.24

    Ending stage: 
Changhsingian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
251.90

Depositional setting


Depositional pattern:  


Additional Information


Compiler:  

Wang Yujing

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