Nayixiong Fm
Period:
Permian
Age Interval:
P3 (58), Wuchiapingian Stage (early Lopingian Epoch; early Late Permian)
Province:
Qinghai
Type Locality and Naming
The type section is located in the vicinity of the Kaixinling Coal Mine, Zhiduo County, Qinghai Province. It was named by the 2nd Regional Geological Survey Party under the Qinghai Geological Bureau in 1982-1983. Lower unit of the Wuli Gr.
Lithology and Thickness
Clastics. Sandy shale, siltstone, limestone and coal seams. Thickness is over 283.7 m.
Lithology Pattern:
Siltstone
Relationships and Distribution
Lower contact
Uncertain contact relationship with the underlying Kaixinling Gr
Upper contact
Regional extent
Distributed in the Kaxinling and Dongmaolong areas of the Zhiduo County.
GeoJSON
null
Fossils
Brachiopods such as Squamularia grandis, Oldhamina transversa, Leptodus nobilis; and Plant fossils (phytolites) represented by the Lobatannularia johorensis-Annularia pingloensis assemblage.
Age
Wuchiapingian Stage of the Lopingian Epoch
Age Span:
Beginning stage:
Wuchiapingian
Fraction up in beginning stage:
0.5
Beginning date (Ma):
256.89
Ending stage:
Wuchiapingian
Fraction up in the ending stage:
1.0
Ending date (Ma):
254.24
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Wang Yujing