Shangputonggou Fm
Type Locality and Naming
The type section is located at Putonggou, 3.2 km east of Zanwa, Ruerga County Gansu Province. It was named by the Xi’an Institute of Geology and Mineral Resources in 1974, and was published in 1976 by Qinfeng and Gan Yan.
Lithology and Thickness
Dolomitic slate. The Shangputonggou Formation, 337.4 m thick, is composed of purplish-red and grayish-green dolomitic silty slate with sandy limestone, and intercalated with a few beds of dolomite in the upper part.
Relationships and Distribution
Lower contact
It rests conformably on the Xiaputonggou Fm.
Upper contact
Conformably overlain by the Gala Fm dolomite (which has the Lazigou Fm claystone as a coeval facies in this region).
Regional extent
Westwards to Luqu and Diebu, the thickness thins to 100 m, and increases to 505.7 m in Xigeershan hill.
GeoJSON
Fossils
It contains Qinlingopora sichuanensis-Q. xiqinlingensis Assemblage Zone in the lower part and Thamnopora elegantula-Favosites compositus Assemblage Zone, Nymphorhynchia? nympha-Howellella latimina Assemblage Zone in the upper part.
Age
Depositional setting
Additional Information