Bilong Fm
Period:
Permian
Age Interval:
P1 (54b), Cisuralian Epoch (Early Permian)
Province:
Xizang (Tibet)
Type Locality and Naming
The type section is located in a belt extending from the east of the Kangma County Town to the Baidingpu area, Tibet. It was named by Zhang Binggao in 1974.
Lithology and Thickness
Sandstone: Light-grey quartz-sandstone. Thickness is about 30 m.
Lithology Pattern:
Sandstone
Relationships and Distribution
Lower contact
Conformable contact with the underlying Kewoxige Fm.
Upper contact
Next younger regional unit is the Kangma Fm.
Regional extent
Distributed in the area of Kangma County
GeoJSON
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Fossils
Brachiopods as represented by the Stepanoviella fauna and simple Coral such as the Pleramplexus, whose features are similar to those faunas found in the Jilong Fm of Dingri area and in the Pangduo Gr of the Lhasa area.
Age
Early Permian Epoch, but details are not given.
Age Span:
Beginning stage:
Artinskian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
290.51
Ending stage:
Artinskian
Fraction up in the ending stage:
1.0
Ending date (Ma):
283.30
Depositional setting
It is interpreted as a
Depositional pattern:
Additional Information
Compiler:
Wang Yujing
GeoJSON estimate by Longgang Ye and Yuyin Li (Chengdu Univ. Tech. students)