Zishan Fm
Type Locality and Naming
The type section is located at Zishanxu, Yudu County, Jiangxi. It was named by Wang Showen n 1930.
Lithology and Thickness
Conglomerate, Sandstone, Coal, Claystone. Lower part is dominated by thick-bedded quartz conglomerate, sandstone-conglomerate and grit, intercalated with minor siltstone and shale. Middle part consists of coal-bearing formations of sandstone, siltstone and shale intercalated with carbonaceous shale and thin coal seams. Upper part is of yellow-white-purple-red shale or claystone and fine-grained siltstone intercalated with carbonaceous shale.
Relationships and Distribution
Lower contact
Conformable contact with the underlying Yangjiayuan Fm or Yanghu Fm
Upper contact
Conformable or disconformable contact with the overlying Laohudong Fm dolomite or Huanglong Fm limestone
Regional extent
Distributed mainly in the areas such as Congyi, Yudu, Anfu and Leping of Jiangxi.
GeoJSON
Fossils
Containing 3 fossil assemblages ascending: the Plant Sphenophyllum tenerrimum-Cardiopteridium spetsbergense and Neuropteris gigantea-Mariopteris acuta assemblages as well as the Brachiopod and Ammonoid Choristites-Branneroceras assemblage.
Age
Depositional setting
The Lower and Middle parts are dominated by continental deposits, while the Upper part by littoral-neritic deposits.
Additional Information