Qianwanling Fm
Type Locality and Naming
It was named by the First Team of the No. 2 Reconnaissance Survey Party under the former Ministry of Geology in 1963. The naming section is located in the area of the Qianwa Ridge, Dadianzi Township, Tieling County, Liaoning Province.
Synonym: （前弯岭组）
Lithology and Thickness
It is composed essentially of grey-green and grey-violet andesites and andesitic tuff-lavas, with its upper part being intercalated with tuffaceous sandstones and andesitic breccias, and with a thickness of about 469-610 m.
Relationships and Distribution
Lower contact
Its basal part is in an unconformable contact with the underlying Jiegutai Fm
Upper contact
Regionally, the schematic strat column indicates the next younger unit as Songshugou Fm
Regional extent
Its distribution is of a small scale, being restricted only to Shimenzi and Longwang Temple areas in the Dadianzi Basin.
GeoJSON
Fossils
No fossil has been found.
Age
Depositional setting
The formation belongs to the fractured volcanic-eruption facies.
Additional Information