Sanglongtan Fm
Period:
Devonian
Age Interval:
D3 (78), Late Devonian
Province:
Yunnan
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.
Lithology Pattern:
Siliceous 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
null
Age
Late Devonian
Age Span:
Beginning stage:
Frasnian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
378.90
Ending stage:
Famennian
Fraction up in the ending stage:
1.0
Ending date (Ma):
359.30
Depositional setting
Depositional pattern:
Additional Information
In the Dacaozi area, it changes into oolitic limestone.
Compiler:
(Xian Shiyuan)