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Huerjing Formation

Huerjing Fm

Period: 
Paleogene

Age Interval: 
Late Eocene , (12a)


Province: 
Inner Mongolia

Type Locality and Naming

Central-Eastern Inner Mongolia. The naming section is located in Houldjin of the Erlian area, Inner Mongolia. Named by W. Granger and C.P. Berkey in 1922.

Synonym: Houldjin Fm


Lithology and Thickness

Mainly a sequence of deposits composed of yellow conglomerate, grit and sandstone, locally with cross bedding. The thickness is >10 m.


Lithology Pattern: 
Conglomerate


Relationships and Distribution

Lower contact

According to Qi Tao (1990), this formation overlies the Late Eocene Baron Sog Fm (Balunsujo Fm) disconformably.

Upper contact

According to Qi Tao (1990), this formation is covered by Quaternary sandy soil disconformably. Regionally, next younger unit is the Wulantataer Fm?

Regional extent


GeoJSON

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Fossils

More than 10 fossil mammals were reported in the formation (Li and Ting, 1983). As stated above, however, as many Eocene fossils from camp Margetts are mixed, only several fossils occur in the real Houldjin area; they are Hypercoryphodon thomsoni, Entelodon dirus and Cadurcodon sp..


Age 

The age of this formation was suggested to be Early Oligocene in the past, but Wang et al. (2019) inferred it was Late Eocene. [China Lexicon column for Paleogene implies only upper Priabonian]

Age Span: 

    Beginning stage: 
Priabonian

    Fraction up in beginning stage: 
0.5

    Beginning date (Ma): 
35.81

    Ending stage: 
Priabonian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
33.90

Depositional setting


Depositional pattern:  


Additional Information


Compiler:  

Tao Deng, Yuanqing Wang, Qian Li, et al.