Home Multi-Country Search About Admin Login
Cenozoic
Cretaceous
Jurassic
Triassic
Permian
Carboniferous
Devonian
Silurian
Ordovician
Cambrian
Neoproterozoic
Mesoproterozoic

Search by
Select Region(s) to search
Hold Ctrl (Windows/Linux) or Command (Mac) to select multiple
Jingangkou Formation
Click to display on map of the Ancient World at:
Jingangkou Fm base reconstruction

Jingangkou Fm

Period: 
Cretaceous

Age Interval: 
Late Cretaceous, K2jg (27a,c)


Province: 
Shandong

Type Locality and Naming

Liu Mingwei et al (1994) named the Jingangkou Formation in Jingangkou of Lvgezhuang Village, Laiyang of Shandong. The type section was measured by Liu Mingwei et al (1992) at the Jingangkou section of the Lvgezhuang Village, Laiyang (120º39', 36º52').

Synomyn: Wangshi Fm, which is now upper Wangshi Gr -- In 1987, this formation was referred to the Wangsi Fm by the Shandong Regional Geological Survey.


Lithology and Thickness

This formation is a group of multi-colored mudstone, siltstone and sandstone. It is intercalated with dolomitic beds. It is 105.5 m thick.


Lithology Pattern: 
Siltstone


Relationships and Distribution

Lower contact

It has a conformably contact with the underlying Hongtuya Fm.

Upper contact

Regional extent

The distribution of this formation is restricted in Laiyang.


GeoJSON

{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[120.83,37.27],[121.05,37.24],[121.29,37.19],[121.32,37.09],[121.29,36.98],[121.13,36.82],[120.66,36.41],[120.26,35.97],[119.66,35.59],[119.16,35.17],[119.23,35.55],[119.37,36.02],[119.64,36.21],[120.02,36.5],[120.47,37.04],[120.83,37.27]]]]}}

Fossils

This formation yields ostracods Talycyprides turgid, T. amoena, Cypridea gigantean, Candona sp., Candoniella caudida; sporopollen Psophophaera sp., Tricolpoites sp.


Age 

[NOTE: Assumed here to be coeval with Jiaozhou Fm in southern part of this basin; therefore Maastrichtian to earliest Danian].

Age Span: 

    Beginning stage: 
Maastrichtian

    Fraction up in beginning stage: 
0.2

    Beginning date (Ma): 
70.94

    Ending stage: 
Danian

    Fraction up in the ending stage: 
0.5

    Ending date (Ma):  
63.85

Depositional setting

The formation is in fluvial- lacustrine deposition, occasionally with arid climate sediments.


Depositional pattern:  


Additional Information


Compiler:  

Wan Xiaoqiao