Shangwurhe Fm
Type Locality and Naming
The type section is located in the No.2 Hole in the Wurhe area 80 km to the northeast of Klamai City, Xinjiang. It was named by the Xinjiang Petroleum Administration in 1958.
Lithology and Thickness
Clastics. Composed of brown conglomerate and siltstone (but into a lake). The formation is 300-400 m thick.
Relationships and Distribution
Lower contact
Conformable contact with the underlying Xiawurhe Fm
Upper contact
Unconformable, but it is hard to differentiate the formation from the Baikouquan Fm of the overlying Triassic System, which used to be called by a joint name known as the Shangzonghongse Fm. But judging from the seismic stratigraphic section, it is clear that there is a distinct unconformity between them.
Regional extent
Distributed in the Wurhe-Xiazijie region of Klamai City on the northwestern margin of the Jungghariya.
GeoJSON
Fossils
Lacking in fossils
Age
Depositional setting
It is interpreted as an alkaline fresh-water lake.
Additional Information
The Sr/Ba value of the claystone is over 1. The content of Ga, Cl, Ti and Zr is on the high side, and the content of Cr is on the low side, indicating that the formation represents deposit formed in an alkaline fresh-water lake.