Jiabosar Fm
Type Locality and Naming
The type section is at Jiabosar (89°43′00″E, 46°29′30″N) on the northern bank of the Ulungur River in Ertai. The Jiabosar Formation was named by Xinjiang Team of Regional Geological Survey and Institute of Geology, Chinese Academy of Geological Sciences (1974), and was published by Hou Hongfei et al. (1979). Its name came from the Jiabosar Village in Fuyun County, northern Xinjiang. During regional geological survey in 1965-1966, Xinjiang Team of Regional Geological Survey considered the previously defined Devonian in Jiabosar north of Ulungur River the Upper Ordovician, and named it the Jiabosar Formation. Xinjiang Compiling Group (1981) included the overlying Bastawu Fm in the Jiabosar Formation. Xiao Bing (1991) suggested that the definition of the previous Jiabosar Formation is more reasonable, and the previous one should be maintained.
Synonym: (加波萨尔组）
Lithology and Thickness
It is characterized by light red limestone and calcareous tuffaceous sandstone. In the type area, the Jiabosar Formation recorded an incomplete thickness of 150 m.
Relationships and Distribution
Lower contact
It rests conformably on the Kiziletesikela Fm
Upper contact
It is disconformably overlain by the Bastawu Fm
Regional extent
The scattered exposures of the Jiabosar Formation are restricted around Jiabosar.
GeoJSON
Fossils
This stratigraphic unit yields abundant corals, such as Plasmoporella convexotabula maxima, Taeniolites lacer, Agetolites mutiabulatus; stromatoporoids Clifdenella fuyunensis, C. pervesiculata; brachiopod Triplesia fuyunensis, Oxoplecia holstonensis, Rhynchotreta cuneata.
Age
Depositional setting
It represents shallow sea environments
Additional Information