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Huoboshan Formation
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Huoboshan Fm base reconstruction

Huoboshan Fm

Period: 
Devonian

Age Interval: 
D22 (5), Givetian (late Middle Devonian)


Province: 
Heilongjiang

Type Locality and Naming

The type section is located at Huoboshan, Beikuang of Wunur, Heilongjiang Province. It was named by the No 2 branch Team of Heilongjiang No 2 Team of Regional Geological Survey in 1981.


Lithology and Thickness

Breccia, sandstone. It is dominated by green breccia intercalated with calcareous quartz sandstone and chert. In Zhadunhe Forest Farm, it changes to fine-grained sandstone and sandy conglomerate, partly intercalated with tuffaceous sandstone and tuff, and commonly with conglomerate and breccia at the base. It is more than 150 m in thickness.


Lithology Pattern: 
Conglomerate


Relationships and Distribution

Lower contact

The formation may be partly in a disconformable contact with the underlying Beikuang Fm siltstone

Upper contact

The next younger formation regionally is the Xiadaminshan Fm tuffs.

Regional extent


GeoJSON

{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[120.68,50.36],[120.86,48.89],[121.92,49.14],[122.78,50.37],[121.66,51.31],[120.68,50.36]]]]}}

Fossils

It contains plant fossil fragments, and coral: Temnophyllum ornatum, Endophyllum abditum, Thamnopora dunbeiensis, Alveolites levis in the Huoboshan section.


Age 

Givetian (late Middle Devonian)

Age Span: 
S

    Beginning stage: 
Givetian

    Fraction up in beginning stage: 
0.2

    Beginning date (Ma): 
384.02

    Ending stage: 
Givetian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
378.90

Depositional setting


Depositional pattern:  


Additional Information


Compiler:  

(Hou Hongfei)