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Permian
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Liangzichuan Formation

Liangzichuan Fm


Period: 
Permian

Age Interval: 
P2 , middle Permian


Province: 
Heilongjiang

Type Locality and Naming

The type section is located at Liangzuchuan, Dashuihe Region, Dongning County, Heilongjiang Province. It was named by the Jilin Provincial Regional Reconnaissance Party in 1981.


Lithology and Thickness

Clastics. Its Basal part is composed of tuffaceous conglomerate; Lower part is composed of carbonaceous sandstone, yielding abundant animal fossils; Middle part is composed of rutile- and cordierite-hornblende siltstone, intercalated with metamorphosed medium-grained sandstone; Upper part is composed of metamorphosed medium-, and fine-grained sandstones, intercalated with rutile and cordierite-hornblende siltstone. Thickness is about 1150 m.


Lithology Pattern: 
Fine-grained sandstone


Relationships and Distribution

Lower contact

Uncertain contact on underlying strata

Upper contact

Unconformable contact with the overlying basalt

Regional extent

Distributed in the Liangzichuan and Hongyeqiao areas of Dashuihe Region, Dongning County, Heilongjiang Province.


GeoJSON

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Fossils

Brachiopods such as Anidanthus cf. aagardi, Muirwoodia sp., Chonetes cf. schlagintweiti, Attenuatella paraincurvata, Orthotichia cf. Schlagintweiti, Alttenuatella paraincurvata and Orthotichia cf. Janiceps, as well as Bivalves such as Pseudomonotis qinlongensis.


Age 

The brachiopod assemblage possesses salient features of the middle Permian Epoch

Age Span: 

    Beginning stage: 
Roadian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
274.37

    Ending stage: 
Capitanian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
259.55

Depositional setting

It is interpreted as a shallow-sea-facies clastic rock formation.


Depositional pattern:  


Additional Information


Compiler:  

Li Li