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Tongshan Formation

Tongshan Fm

Period: 
Ordovician

Age Interval: 
Early to Middle Ordovician, (7)


Province: 
Heilongjiang

Type Locality and Naming

Type section at Tongshan, west of Luohe river, Nenjiang County, Heilongjiang Province. Named by Compiling Group for Heilongjiang Regional Stratigraphic Scale, 1979, Regional Stratigraphic Scale of Northeast China: Heilongjiang Province, Beijing: Geological Publishing House. First appeared in a 1977 manuscript by No.2 Element of No.1 Heilongjiang Regional Geological Survey Team.

Synonym: Synonymous with Halahalahe Fm; Homonymous with Tungshan Fm. Confusingly, it was also used as a synonym for the Tangshan Fm (which is Carboniferous)


Lithology and Thickness

Grayish green, dark gray, grayish yellow tuffaceous sandstone, slate, with interbeds of arkose and rudite.


Lithology Pattern: 
Clayey sandstone


Relationships and Distribution

Lower contact

Upper contact

Regionally, the next younger unit is the Duobaoshan Fm

Regional extent


GeoJSON

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Fossils


Age 


Age Span: 

    Beginning stage: 
Floian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
477.08

    Ending stage: 
Sandbian

    Fraction up in the ending stage: 
0.1

    Ending date (Ma):  
457.63

Depositional setting


Depositional pattern:  


Additional Information


Compiler:  

Extracted from Geological Formation Names of China (1866-2000); Springer Publ.