Jinhe Fm
Type Locality and Naming
The type section is located at Mihangaoqiaogaolu, southwest of the Jinhe River, West Ujimqin Banner, Inner Mongolia. It was named by Han Jianxiu et al. in 1979.
Lithology and Thickness
Sandstone and Limestone. The bottom is composed of pebbled grit, sandstone and siltstone, and dominated by gray thick-bedded massive limestone and bioclastic limestone going upward. The middle and lower parts are intercalated with minor gray-green thin-bedded clayey siltstone, pebbled grit and medium- to coarse-grained greywacke, 285.6 m thick.
Sediments of this formation are from sandstones to limestones, forming the sequence from retrogression to transgression.
Relationships and Distribution
Lower contact
Conformable contact with the underlying Benbatu Fm
Upper contact
Conformable contact with the overlying Amushan Fm
Regional extent
Distributed at Houtoumiao, Xialehada, Mihangaoqiaogaolu, etc., in the southeast area of the West Ujimqin Banner, Inner Mongolia.
GeoJSON
Fossils
Fusulinid Triticites, including Rugosofusulina sp., Quasifusulina sp., Staffella and Schubertella sp.; colonial Corals Hillia sp., Anitheria sp. and Cystolonsdaleia sp.; and associated with minor brachiopods, bryozoans, etc.
Age
Depositional setting
It is interpreted as a marine transgression succession.
Additional Information