Pongga Fm
Type Locality and Naming
The type section is located on the south slope of Deriangma Mt. to Xiala Mt., 6 km northeast of Yunzhug Township, Xianza, Tibet. It was named by Yang Shipu and Fan Yingnian in 1982.
Lithology and Thickness
Limestone. Gray-white massive compact limestone, with moderately thick-bedded pink compact limestone and bioclastic limestone at top, and locally with brecciated limestone and pebbly limestone. Thickness 240 m.
Relationships and Distribution
Lower contact
Conformable contact with the underlying Duonageli Fm
Upper contact
Disconformable contact with the overlying Barialongzhai Fm
Regional extent
Mainly distributed in Yunzhug Township of Xianza County, Chaguoluoma Mt., Deriangma Mt. and the Gyêwa area
GeoJSON
Fossils
Corals Humboldtia sp., Parahumboldtia stereoseptata, Ekvasophylloides simplex, E. stenocystatum and Siphonophyllia mulitiseptata.
Age
Depositional setting
It is interpreted as normal neritic deposits
Additional Information