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Fuxingtun Formation
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Fuxingtun Fm base reconstruction

Fuxingtun Fm

Period: 
Devonian

Age Interval: 
D2, Middle Devonian


Province: 
Heilongjiang

Type Locality and Naming

LOCAL: The type section is located at Ma’anshan of Yanshou County, Harbin district, southwestern Heilongjiang. It was named by the Heilongjiang No 1 Team of Regional Geological Survey and was published by “Heilongjiang Regional Stratigraphical Scale” in 1979.


Lithology and Thickness

Claystone, volcanics. The formation is characterized by continental clastic deposits, composed of gray and dark-gray clayey slate, tuffaceous fine sandstone, sandy-gravelly slate intercalated with sericitized felsite volcanic rock. The outcropped thickness is 1316 m, but its lower boundary is unclear.


Lithology Pattern: 
Sandy claystone


Relationships and Distribution

Lower contact

Its lower boundary is unclear.

Upper contact

The top of the formation is an unconformable contact with rhyolite porphyry of unknown age.

Regional extent


GeoJSON

{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[127.22,45.46],[126.95,45.07],[127.91,44.89],[128.792724609375,45.36],[128.15,45.8],[127.22,45.46]]]]}}

Fossils

The upper part of this Formation contains plant fossils Taeniocrada decheniana, Barsassia sibirica, Protolepidodendrom yanshouense, Lepidodendropsis? sp.


Age 

Middle Devonian

Age Span: 
S

    Beginning stage: 
Eifelian

    Fraction up in beginning stage: 
0.5

    Beginning date (Ma): 
389.80

    Ending stage: 
Givetian

    Fraction up in the ending stage: 
0.5

    Ending date (Ma):  
382.10

Depositional setting


Depositional pattern:  


Additional Information


Compiler:  

(Hou Hongfei)