Sheshan Fm
Type Locality and Naming
The type section is on Sheshan Hill 5 km north of Gongwusu in Wuhai City, Inner Mongolia. The Sheshan Fm was named by Chen Junyuan et al. in 1984.
Synonym: (蛇山组）
Lithology and Thickness
The formation has a Lower part of yellowish green sandy, calcareous shale intercalated with bioclastic limestone; and an Upper part of medium-bedded bio-calcirudite. In the type area, the Sheshan Fm is 13.7 m thick.
Relationships and Distribution
Lower contact
It rests conformably on the sandstone intercalated with shale in the upper part of the Gongwusu Fm
Upper contact
It is disconformably overlain by the Middle Carboniferous.
GeoJSON
Fossils
This stratigraphic unit yields cephalopods of Eurasiaticoceras-Sheshanoceras assemblage, and is equivalent to or slightly higher than the Dicranograptus clingani zone (Fu et al., 1993).
Age
Depositional setting
Additional Information