Wudaoliang Fm
Period:
Neogene
Age Interval:
Oligocene – Miocene, E3-N1, (8d)
Province:
Qinghai
Type Locality and Naming
The lectostratotype is Aburiajiazai section (N34°08′00″，E92°30′00″), Zhiduo County, Qinghai Province, which was measured by Gengcheng Guo et al. in 1989. The Wudaoliang Formation named by the Comprehensive Geological Brigade of Qinghai Regional Geological Survey in 1990.
Lithology and Thickness
Orange mudstone, light grayish-green marl interbedded with gypsum and salt rock. The thickness ranges from 115 m to 1300 m.
Lithology Pattern:
Gypsiferous claystone
Relationships and Distribution
Lower contact
The Wudaoliang Formation conformably overlies the Yaxicuo Fm.
Upper contact
The Wudaoliang Formation is unconformably overlain by the Quguo Fm.
Regional extent
Golmud, Qinghai Province.
GeoJSON
null
Fossils
The Wudaoliang Formation contains ostracods and pollen fossils.
Age
[For Lexicon graphic purposes with adjacent and overlying/underlying uncertain age spans; put here as only late Oligocene – earliest Miocene.]
Age Span:
Beginning stage:
Chattian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
27.29
Ending stage:
Aquitanian
Fraction up in the ending stage:
1.0
Ending date (Ma):
20.45
Depositional setting
Lacustrine facies.
Depositional pattern:
Additional Information
Compiler:
Tao Deng, Sukuan Hou, J.Z. Qigao, Q. Li, Q.Q. Shi, B.Y. Sun, S.Q. Wang, F.X. Wu