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Hongya Formation

Hongya Fm

Period: 
Neogene

Age Interval: 
Late Miocene, N1, (6a)


Province: 
Qinghai

Type Locality and Naming

Hexi corridor (Gansu-Qinghai). The naming section is located at Xiangshuihe in the Daha’erten River valley, Ulan County, in the western segment of the Qilian Mountains, Qinghai. Named by the First Regional Survey Party of Gansu in 1985.


Lithology and Thickness

In most areas mainly purplish red clastic rocks, composed of grayish white, brownish red and brownish yellow marlstone, mudstone, sandstone and conglomerate, the base of which is red sandstone and conglomerate. The thickness is up to 2600 m.


Lithology Pattern: 
Continental marl


Relationships and Distribution

Lower contact

It overlies late Cenozoic strata with angular unconformity.

Upper contact

Regional extent


GeoJSON

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Fossils

Perissodactyla: Hipparion, Chilotherium; Artiodactyla: Samotherium, Gazella, Chleuastochoenus, Cervidae indet., Giraffidae indet.; Carnivora: Carnivora indet.


Age 


Age Span: 

    Beginning stage: 
Tortonian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
11.63

    Ending stage: 
Messinian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
5.34

Depositional setting

Fluvio-lacustrine deposits.


Depositional pattern:  


Additional Information


Compiler:  

Tao Deng, Sukuan Hou, J.Z. Qigao, Q. Li, Q.Q. Shi, B.Y. Sun, S.Q. Wang, F.X. Wu