Xipingshan Fm
Type Locality and Naming
The type section is located at western Zhusilenghaierhan, north margin of Badanjilin Desert in western Inner Mongolia Autonomous Region. It was named by the Cooperative Research Group of Xi'an Institute of Geology and Mineral Resources and Ningxia Geological Team in 1979, and published in 1:200,000 Geological Map and its Explanations, Yagan and Guaizihu Sheets in 1981.
Lithology and Thickness
The Formation is subdivided into two members. The relationship between these Lower and Upper members and the age of the Upper member are problematic.
Sandstone. Lower member outcrop in Xipingshan is composed of purplish-red to brownish-purple medium- to fine-grained sandstone intercalated with few lenses of conglomerate and limestone. It is more than 1560 m thick.
Andesite. Upper member outcrop in northwest Hulun consists of andesite and andesite breccia with lenses of limestone and marble and is more than 400 m thick.
Relationships and Distribution
Lower contact
Conformable contact with the underlying Zhulumute Fm.
Upper contact
Not known. Chart shows it as overlain by Quaternary => later formations removed by later erosion in exposed region?
Regional extent
GeoJSON
Fossils
The Lower member contains brachiopoda Tenticospirifer spp., Cariniferella sp., Productella sp.,
coral ?Phillipsatrea sp., Disphyllum sp.
The Upper member yields coral Thamnopora sp.
Age
Depositional setting
Additional Information
The relationship between these Lower and Upper members and the age of the Upper member are problematic.