Sanglongtan Fm
Type Locality and Naming
The type section is located at the area near Shangmaoniuping, 10 km north of Lude Village, Yongsheng County of Yunnan Province.
It was named by Paleontological Group of Yunnan Bureau of Geology in 1972 and published by Yunnan Regional Stratigraphical Scale in 1978.
Lithology and Thickness
Limestone. This Formation, 157 m thick, is composed of gray thin- to medium-thick-bedded limestone, intercalated with siliceous rocks and few beds of sandstone at the base.
In the Dacaozi area, it changes into oolitic limestone.
Relationships and Distribution
Lower contact
It rests conformably on the Shangmaoniuping Fm.
Upper contact
It is disconformably overlain by Triassic sandstones.
Regional extent
GeoJSON
Fossils
This Formation contains brachiopoda Yunnanellina sp., Cyrtospirifer sp.
Age
Depositional setting
Additional Information
In the Dacaozi area, it changes into oolitic limestone.