Yangjiayuan Fm
Type Locality and Naming
The type section is located at Yangjiayuan, Fangqi Township, Lianhua County, Jiangxi. It was named by Zhu Zhenggang in 1993.
Lithology and Thickness
Limestone, Claystone and Anhydrite. Gray-black to black limestone and marl intercalated with minor thin-bedded shale and carbonaceous shale. In the borehole, the middle and upper parts of the formation is intercalated with several layers of anhydrite (evaporite) and dolomite. Thickness 84−320 m.
Relationships and Distribution
Lower contact
Conformable contact with the underlying Devonian Yanghu Fm. But, Devon strat column for Jiangxi indicates that Sanmentan Fm is the uppermost Devonian unit here)
Upper contact
Conformable contact with the overlying Zishan Fm
Regional extent
GeoJSON
Fossils
The Lower part yields Brachiopods Eochoristites sp., Rhipidomella sp., Schuchertella sp., etc.; the Upper part yields Fusulinid Eostaffella sp., Corals Kueichouphyllum sp., Heterocaninia sp., Syringopora sp., etc.;
Age
Depositional setting
It is interpreted as subtidal lagoon deposits.
Additional Information