Xihansitegou Fm
Period:
Carboniferous
Age Interval:
C21 (22b), late Early Carboniferous
Province:
Qinghai
Type Locality and Naming
The type section is located at Diaosu Nanshan, Wutumeiren (Urt Moron) Township, Golmud City, Qinghai. It was named by Wang Zengji in 1982.
Lithology and Thickness
Sandstone and Limestone. Lower part consists of sandstone-conglomerate and marl. Upper part is of limestone. Thickness 53.9 m.
Lithology Pattern:
Sandy limestone
Relationships and Distribution
Lower contact
Unconformable contact with the underlying Devonian or even older stratum
Upper contact
Disconformable contact with the overlying Diaosu Fm
Regional extent
GeoJSON
null
Fossils
Containing two Coral assemblages: Kueichouphyllum sinense-Palaeosmilia stutchburyi in the lower part; Dibunophyllum bipartitum in the upper part.
Age
late Early Carboniferous. Lexicon chart shows as upper Visean-Serpukhovian and Coeval with Wutumeiren Fm in this same interval. For graphic purposes to avoid overlap, polygon displayed as upper part of that interval.
Age Span:
Beginning stage:
Visean
Fraction up in beginning stage:
0.9
Beginning date (Ma):
331.98
Ending stage:
Serpukhovian
Fraction up in the ending stage:
0.4
Ending date (Ma):
327.56
Depositional setting
It is interpreted as marine-continental deposits
Depositional pattern:
Additional Information
Compiler:
Wang Rennong