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Honglishan Formation
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Honglishan Fm base reconstruction

Honglishan Fm

Period: 
Cretaceous, Paleogene

Age Interval: 
Late Cretaceous, K2hl, (1a)


Province: 
Xinjiang

Type Locality and Naming

Tang Keyi erected the Honglishan rock series in 1955. The type locality is in Honglishan of the south Fuhai County, Xinjiang. The reference section is at Sangequan of the south Fuhai County, Xinjiang.


Lithology and Thickness

Lower part of the Honglishan Formation is represented by gray white quartz grit and sandy conglomerate with brown yellow sandy mudstone and with calcareous nodules. Upper part is brown red sandy mudstone with the same colored or small amounts of light gray calcareous sandstone and conglomerate with gypsum. The formation is 101.36 m thick.


Lithology Pattern: 
Clayey sandstone


Relationships and Distribution

Lower contact

The base of the formation marked by brown mudstone overlaps unconformably on the Paleozoic at type section. Regionally, conformable on the Donggou Fm (mid-Late Cretaceous)

Upper contact

The top marked by brown red mudstone with sandstone lies conformably below the overlying Paleogene Sangequan Fm (= Yixibaila Fm ??).

Regional extent

The present formation occurs sporadically on the northwest, north and northeast margins of the Junggar basin of Xinjiang. In Honglishan, Delunshan and Lijishan areas on the northwest margin of the basin, it shows a slightly angular discordance with the underlying Donggou Formation; in the Ermuchang area of the Ulungur River it overlaps the Paleozoic; in the Gobi-Wuolonggang area of Jiangjun on the northeast margin of the basin, it overlaps the Jurassic Coal Measures, and lies conformably, disconformably or locally unconformably under the overlying Paleogene, with the exposed thickness from 73 to 101 m.


GeoJSON

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Fossils

This formation yields ostracods Talicypridea amoena, Cypridea cavernosa, Candona longirenifformis; bivalves Pseudohyria zhungarica, P. sangequanensis; Charophytes Aclistochara mundula, Maedlerisphaeria nana; and carnivorous Dinosaurs. In the Gobi area of Jiangjun also yields bivalves Cuneopsis vjalovi, C. hongsaquanensis; gastropods Mesolanistes efremovi, M. bajanchongorensis, Hydrobia nemegetensis; and Dinosaurian eggs Ooulityes rugustus, O. elongatus, O. megatermus, O. sphaeroides, etc.


Age 

Not given; but temporarily placed as coeval with base of Ziniquanzi Fm in the adjacent sub-basin of same Junggar Basin; which is implied as beginning in upper Campanian by Dangpeng Xi, Xiaoqiao Wan, et al. (2019; Integrated Stratigraphy and TimeScale of China) and extending early-Early Eocene (base Yixibaila Fm).

Age Span: 

    Beginning stage: 
Campanian

    Fraction up in beginning stage: 
0.75

    Beginning date (Ma): 
75.04

    Ending stage: 
Ypresian

    Fraction up in the ending stage: 
0.5

    Ending date (Ma):  
52.04

Depositional setting

It is of continental facies.


Depositional pattern:  


Additional Information


Compiler:  

Wan Xiaoqiao