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
Hexian Formation

Hexian Fm

Period: 
Devonian

Age Interval: 
D13 (67), late Early Devonian


Province: 
Guangxi

Type Locality and Naming

The type section is located from Shankou to Hongfan of Renyi in Hexian County, Guangxi. It was named in “Guangxi Regional Geology” in 1985.


Lithology and Thickness

Siltstone. It is dominated by purplish-red, grayish-green shale, mudstone, sandy shale, intercalated with sandstone and siltstone, fine-grained sandstone, dolomite and limestone.

It is 187 m thick and the regional thickness is about 48-440 m.


Lithology Pattern: 
Siltstone


Relationships and Distribution

Lower contact

This formation is in a conformable contact with the underlying Shiqiao Fm.

Upper contact

This formation is in a conformable contact with the overlying Xindu Fm.

Regional extent

It is mainly distributed in Hexian, Zhongshan, Pingle, and Xing’an and Quanzhou in North Guangxi as well.


GeoJSON

null

Fossils

It mainly yields fish Yunnanolepis chii, coral Favosites sp., Aulopora sp., bivalve Modiomorpha sp., Salinopsis sp. and plant fossil.


Age 

late Early Devonian

Age Span: 

    Beginning stage: 
Eifelian

    Fraction up in beginning stage: 
0.7

    Beginning date (Ma): 
388.00

    Ending stage: 
Eifelian

    Fraction up in the ending stage: 
0.9

    Ending date (Ma):  
386.20

Depositional setting


Depositional pattern:  


Additional Information


Compiler:  

Wang Shitao