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Kumutake Formation
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Kumutake Fm base reconstruction

Kumutake Fm

Period: 
Cretaceous

Age Interval: 
Late Cretaceous, K2km, (2)


Province: 
Xinjiang

Type Locality and Naming

Turpan Basin. Xia Gongjun erected the Kumutake series in 1956. The section for the designation is in Kumutake (Shadunzi) 10 km south of the Shanshan County, Xinjiang.

Synonym: Kumtax Fm


Lithology and Thickness

The Kumutake Formation is represented by tangerine and brown red massive fine sandstone, occasionally with red mudstone and blue gray granule conglomerate in the lower part. It is 123 m thick.


Lithology Pattern: 
Fine-grained sandstone


Relationships and Distribution

Lower contact

Its base marked by blue gray granule conglomerate lies disconformably on the underlying Lianmuqin Fm.

Upper contact

Its top marked by tangerine and brown red massive granule conglomerate lies unconformably under the overlying Subashi Fm.

Regional extent

The present formation occurs in Huoyanshan of the Turpan basin and the Kumutake (Shadunzi) of Shanshan County, and eastward sporadically south of Wudaogou. It is monomorphic and persistent in lithology and ranges from 20 to 123 m in thickness.


GeoJSON

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Fossils

The formation bears ostracods Talicypridea meliora, T. gemma, Cypridea caveernosa, C. rostrata, Ziziphocypris simakovi, Candoniella mordvilkoi.


Age 

Shown as end-Turonian through middle Campanian by Dangpeng Xi, Xiaoqiao Wan, et al. (2019; Integrated Stratigraphy and TimeScale of China)

Age Span: 

    Beginning stage: 
Turonian

    Fraction up in beginning stage: 
0.9

    Beginning date (Ma): 
89.84

    Ending stage: 
Campanian

    Fraction up in the ending stage: 
0.75

    Ending date (Ma):  
75.04

Depositional setting

It is of fluvial-lacustrine deposition.


Depositional pattern:  


Additional Information


Compiler:  

Wan Xiaoqiao