Jinci Fm
Type Locality and Naming
The type section lies near Jinci Town, Taiyuan, Shanxi. It was named by E. Norin in 1922.
Lithology and Thickness
Clayey Sandstone. It is composed of gray-white and gray-brown fine- to medium-grained quartz greywacke intercalated with light-gray tuffs, marine black mudstone, thin coal seams, lenticular bioclastic rock and siderite nodules. In some local areas, the upper part contains 1 to 2 layers of bauxite. The formation varies greatly in thickness, from 19 m to 68 m.
Relationships and Distribution
Lower contact
Disconformable contact with the underlying Bangou Fm limestone
Upper contact
Disconformable contact with the overlying Mao’ergou Member of the Taiyuan Fm => a sub-column in 29 (which is currently generalized as "most N China"?
Regional extent
GeoJSON
Fossils
In the mudstone are contained plants Neuopteris pseudovata, Pecopteris cyathea, etc.; in the limestone are corals Lophocarinophyllum cf. acanthiseptum and Lophophyllidium cf. pendulum; brachiopods Avonia cf. echidniformis, Martinia semiglobosa, Chonetes aff. jungchangensis, etc.
Age
Depositional setting
It is interpreted as marine-continental deposits
Additional Information