Barialongzhai Fm
Type Locality and Naming
The type section lies from the south slope of Deriangma Mt. to Xiala Mt. 6 km (straight distance) northeast of Yunzhug Township, Xianza, Tibet. It was named by Yang Shipu and Fan Yingnian in 1982.
Lithology and Thickness
Clayey Limestone. Dominated by thin- to moderately thick-bedded purple-red, purple-gray and yellow nodular clayey limestones, containing ferruginous bioclastic limestone, with ferruginous-calcareous poorly sorted quartzose sandstone at bottom. Thickness 29 m.
Relationships and Distribution
Lower contact
Disconformable contact with the underlying Pongga Fm.
Upper contact
Conformable contact with the overlying Yunzhug Fm.
Regional extent
Mainly distributed along Yunzhug Township of Xianza to both flanks of the Tarma syncline and Gemang Co.
GeoJSON
Fossils
Contained in the limestone are Corals Endothecium elegantum, Hapsiphyllum minor and Rhopalolasma sp., Brachiopods Ovatia wischnjakewi, Overtonia fimbriata and Plicochonetes buchianus.
Age
Depositional setting
It is interpreted as neritic with littoral sediments.
Additional Information