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Kangma Formation
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Kangma Fm base reconstruction

Kangma Fm


Period: 
Permian

Age Interval: 
P (54b), Kungurian Stage (late-Cisuralian Epoch; late-Early Permian)


Province: 
Xizang (Tibet)

Type Locality and Naming

The type section is located in the area of Baidingpu to the east of the Kangma County town, Tibet. It was named by Zhang Binggao in 1974.


Lithology and Thickness

Claystone. Grey knotted slate. Thickness is about 100 m.


Lithology Pattern: 
Claystone


Relationships and Distribution

Lower contact

Next older regional unit is the Bilong Fm.

Upper contact

Conformable contact with the overlying Baidingpu Fm.

Regional extent

Distributed in the area of Kangma County.


GeoJSON

{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[89.59,28.82],[89.56,28.79],[89.52,28.72],[89.44,28.69],[89.41,28.62],[89.32,28.65],[89.3,28.62],[89.3,28.58],[89.3,28.53],[89.3,28.46],[89.29,28.41],[89.26,28.35],[89.28,28.26],[89.24,28.18],[89.2,28.14],[89.23,28.1],[89.28,28.06],[89.42,28.14],[89.48,28.23],[89.61,28.3],[89.69,28.31],[89.75,28.31],[89.87,28.31],[89.92,28.34],[89.94,28.41],[89.94,28.47],[89.91,28.54],[89.9,28.61],[89.92,28.67],[89.97,28.69],[90.04,28.67],[90.07,28.69],[90.07,28.73],[90.05,28.76],[90.01,28.78],[89.94,28.82],[89.77,28.83],[89.59,28.82]]]]}}

Fossils

Yields a small amount of brachiopods as represented by Martinia, Attenuatella, Linoproductus, Stenoscisma, etc., whose stratigraphic horizon is corresponding to that of the Qubu Fm in the Himalayan stratigraphic region, belonging to the Qixia’an Subepoch of the Yangsingian Epoch.


Age 

Qixia’an Subepoch of the Yangsingian Epoch = Kungurian Stage (late-Cisuralian Epoch; late-Early Permian)

Age Span: 

    Beginning stage: 
Kungurian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
283.30

    Ending stage: 
Kungurian

    Fraction up in the ending stage: 
0.4

    Ending date (Ma):  
279.73

Depositional setting


Depositional pattern:  


Additional Information


Compiler:  

Wang Yujing

GeoJSON estimate by Longgang Ye and Yuyin Li (Chengdu Univ. Tech. students)