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Zhageyong Formation

Zhageyong Fm


Period: 
Permian

Age Interval: 
P (58), Capitanian Stage (late Guadalupian Epoch; late-Middle Permian


Province: 
Qinghai

Type Locality and Naming

The type section is located in the area of Gamaodengzou to the north of the Mohai region and to the south of the Ziqu region, Zaduo County, Qinghai Province. It was named by the 2nd Regional Geological Reconnaissance Party in 1982-1983.


Lithology and Thickness

Volcanics and Clastics. Composed of grey-purple basalt, volcanic breccia, coarse- and medium-grained lithoclastic sandstone, feldspar-rich sandstone, siltstone and bio-limestone, with a thickness of over 1436 m.


Lithology Pattern: 
Volcanics


Relationships and Distribution

Lower contact

Conformable contact with the underlying Gadikao Fm

Upper contact

Unconformable contact with the Wuli Gr (Nayixiong Fm)

Regional extent

Distributed in the Jiezha area of the Ziqu region, Zaduo County, Qinghai Province.


GeoJSON

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Fossils

Yields Fusulinid fossils such as Yabeina, Neoschwagerina, Verbeekina, Yangchienia, Schwagerina and Nankinella; Ammonoids such as Altudoceras, Agathiceras; and Brachiopods such as Urushtenia, Spiriferellina, Neoplicatifera, Waagenochocha, Acosarina, Orthotichia.


Age 

Lengwuan Stage of the Yangsingian Epoch = Capitanian Stage (late Guadalupian Epoch; late-Middle Permian

Age Span: 

    Beginning stage: 
Roadian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
274.37

    Ending stage: 
Wordian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
264.34

Depositional setting


Depositional pattern:  


Additional Information


Compiler:  

Wang Yujing