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Chunjieqiao Formation
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Chunjieqiao Fm base reconstruction

Chunjieqiao Fm

Period: 
Devonian

Age Interval: 
D1, (25), Early Devonian


Province: 
Xizang (Tibet)

Type Locality and Naming

The type section is located at Guqin of Chayu County, Xizang Autonomous Region. It was named by Chen Bingwei, Ai Changxing and Zhaxi Wangqu in 1982.


Lithology and Thickness

Sandstone. The formation is characterized by a set of purplish-red coarse-grained clastic rocks composed of purplish-red pebble-bearing coarse-grained sandstone and fine-grained sandstone, partly intercalated with black to grayish-black slate and sandy slate. It is 348 m in thickness.


Lithology Pattern: 
Sandstone


Relationships and Distribution

Lower contact

Disconformably overlies on the nodular limestone of Ordovician Sangqu Fm.

Upper contact

See note on Songzong Gr ; which is next younger unit in the general region; but its lower contact is not known.

Regional extent

It is mainly distributed at south of Ranwu, the southeast of Songzong County and Chunjieqiao of Chayu County, Xizang Autonomous Region


GeoJSON

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Fossils

No fossils have been found.


Age 

Early Devonian

Age Span: 
S

    Beginning stage: 
Lochkovian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
419.00

    Ending stage: 
Emsian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
394.30

Depositional setting


Depositional pattern:  


Additional Information


Compiler:  

(Xian Siyuan)