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
Longhuashan Formation

Longhuashan Fm

Period: 
Devonian

Age Interval: 
D13 (56), Late Emsian ((late Early Devonian)


Province: 
Yunnan

Type Locality and Naming

The type section is located at Longhuashan of Zhanyi, Yunnan, and the reference section is at Xujiachong of Qujing, Yunnan.

It was named by A.W. Grabau in 1931.


Lithology and Thickness

Sandstone. In Xujiachong section, it is dominated by yellowish-green, purplish-red, grayish-green and yellowish-white sandstone, mudstone and shale interbeds. It is 500-800 m thick.

In Longhuashan section, the lower part of Longhuashan Fm is incompletely outcropped (about 90 m), but the lithology is the same as that of the Xujiachong section.


Lithology Pattern: 
Sandstone


Relationships and Distribution

Lower contact

Upper contact

The top is in a conformable or disconformable contact with the overlying Chuandong Fm (the lower part of old Haikou Fm).

Regional extent


GeoJSON

null

Fossils

This formation mainly yields plant fossils Dreparophycus spinaeformis, Zosterophyllum yunnanicum; fish Galeaspis shujiachongensis and bivalve.


Age 

Late Emsian ((late Early Devonian)

Age Span: 

    Beginning stage: 
Emsian

    Fraction up in beginning stage: 
0.5

    Beginning date (Ma): 
402.41

    Ending stage: 
Emsian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
394.30

Depositional setting


Depositional pattern:  


Additional Information


Compiler:  

(Wang Shitao)