Shetianqiao Fm
Type Locality and Naming
The type section is located at Shetianqiao village, Shaodong County, Hunan Province.
It was named by Tian C.C., Wang Xiaoqing and Guo Shaoyi in 1929.
Lithology and Thickness
Marl. The formation is characterized by shale and marl intercalated with limestone and clayey limestone. It has a maximum thickness of 332 m; in Heqing of Lenshuijiang and Gaoping of Liuyang, it recorded a minimum thickness of only tens of meters.
Relationships and Distribution
Lower contact
It is underlain by various formations in different areas: Longkouchong Fm (Sandstone) at Shetianqiao of Shaodong;
Qilijiang Fm (Limestone) at Qiziqiao of Xiangxiang, Xikuangshan of Lengshuijiang and Huaqiao of Xingshao;
Qiziqiao Fm (Limestone) at Yangtaang of Xingshao, Heqing of Lengshuijiang, Gaoping of Liuyang, Xiaodong of Lingling.
Upper contact
Regional extent
This Formation is mainly exposed in central and south Hunan.
GeoJSON
Fossils
The main fossils in this formation are: Ammonoids: Manticoceras spp., Conodonts: Palmatolepis spp., Ancyrognathodus triangularis, Corals: Phillipsastrea sp., Mictophyllum sp., Pseudozaphrentis sp., Sinodisphyllum sp., Hunanophrentis sp., Brachiopods: Desquamatia sp., Spinatrypa sp., Spinatrypina sp., Cyrtospirifer sp., Rigauxia sp.
Age
Depositional setting
It is interpreted as a shallow open platform setting.
Additional Information