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Danggongla Formation

Danggongla Fm


Period: 
Triassic

Age Interval: 
Early Triassic (TJ43)


Province: 
Xizang (Tibet)

Type Locality and Naming

Named in 1991 by Liang Dingyi and others. The type section is located on the western slope of Mayangpusela, Zanda County, Tibet

Synonym:


Lithology and Thickness

It is composed of khaki, light gray limestone. The thickness is 10 to 15 m.


Lithology Pattern: 
Limestone


Relationships and Distribution

Lower contact

It is pseudo-integrated contact with the lower Permian upper part of Mongzongrong Fm or the Xilanta Fm.

Upper contact

Regional extent

Mainly distributed in Mayang, Jiesheng, Mangzongrong, Manangyu and Bolin, Zanda County, Tibet. It is also found in Prandorjean. It is brown sparite with a thickness of about 15 m.


GeoJSON

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Fossils

Ammonoid fossils: Pseudocellites multiplicatus, P. sp., Leiophyllites sp., Eukashmirites acutangulatus; conodont fossils: Neogondolella jubata; bivalves Leptochondria minima—Zandaia angusta assemblage. In Prandorjean, it is commonly known as "Chocolate Limestone". It produces ammonoids Meekoceras sp., conodont Neospathodus cristagalli, N. dieneri, etc. The bivalves can be Claraia hubeiensis— Promyalina intermedia assemblage.


Age 

Schematic stratigraphic section indicates it spans the Induan-Olenekian.

Age Span: 

    Beginning stage: 
Induan

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
251.90

    Ending stage: 
Olenekian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
246.70

Depositional setting

This group is in shallow marine setting.


Depositional pattern:  


Additional Information


Compiler:  

Zhang Shunxin, Ji Kaixuan and Tong Jinnan.