Basirgan Fm
Type Locality and Naming
The type section is located is located in the Basirgan area in the western segment of the Awulale Mt., Xinjiang, with the revised comprehensive section (by Zhang Zhimin, Wu Shaozu, 1991) in the Awulale Mt. serving as a reference section. It was named by the No. 9 Geological Survey Expedition under the Geological Bureau of Xinjiang in 1979.
Lithology and Thickness
Clastics. Mainly brown-yellow, red, purple and grey-green conglomerates, intercalated with lithic feldspar-rich sandstone, calcareous lithic sandstone, siltstone, limestone and coal seams. Thickness is 1541 m
Relationships and Distribution
Lower contact
Unconformable contact on the underlying Tamqisayi Fm.
Upper contact
Overlain by Jurassic.
Regional extent
Distributed in the area of Tale Pass (with a thickness of 240 m), the western segment of the Awulale Mt. (with a thickness of 654 m), the eastern segment of the Awulale Mt. (with a thickness of 579 m), and the Qiapuqiale Mt. (with a thickness of 800-900 m).
GeoJSON
Fossils
Bivalves represented by Palaeomutella cf. subparallela, P. cf. opinata.
Age
Depositional setting
It is interpreted as intermontane-basin deposits.
Additional Information