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Gabo Gr

Gabo Gr


Period: 
Triassic

Age Interval: 
Late Triassic, (TJ47b)


Province: 
Xizang (Tibet)

Type Locality and Naming

Wang Naiwen and other Tibetan comprehensive census brigade in 1976 jointly named, Tibetan district investigation team in 1979 for the first time publicly quoted. The named section is located at the junction of Langkazi County and Lozha County (formerly known as Gapo) in Tibet, starting from Gegananan in the east of Tonga Village in Langkazi County in the north, and southward to Uyulla and Mera Pass. In 1983, Wang Naiwen et al. redefined the meaning of the Gapo Gr, which is only a dark slate system with fossil evidence from the Late Triassic that is distributed in the southern part of the Yangzhuoyongzuo, Tibet.

Synonym: Gapo Gr


Lithology and Thickness

It is black slate, schist and schist interspersed with black siltstone shale, carbonaceous shale and dark gray siltstone marble. The total thickness is over 5000 m.


Lithology Pattern: 
Claystone


Relationships and Distribution

Lower contact

The contact relationship with the underlying strata is unknown. On the schematic stratigraphic column, the next older regional unit is the Lvcun Gr of Early and Middle Triassic.

Upper contact

The contact relationship with the overlying strata is unknown. On the schematic stratigraphic column, the next younger regional unit is the Ritang Fm of Early Jurassic.

Regional extent


GeoJSON

null

Fossils

Ammonoids: Arcestes sp., Cladiscites sp., Buchites sp., Griesbachites cf. kastner, Clionites sp., Placites sp., bivalves: Monotis sp.


Age 

Schematic stratigraphic section indicates it spans the Carnian through Norian.

Age Span: 

    Beginning stage: 
Carnian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
237.00

    Ending stage: 
Norian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
205.74

Depositional setting

This group has deep-sea-semi-depth sedimentary characteristics.


Depositional pattern:  


Additional Information


Compiler:  

Zhang Shunxin, Jian Yuanping and Tong Jinnan.