Tianwadong Fm
Period:
Devonian
Age Interval:
D31 (74), early Late Devonian
Province:
Fujian
Type Locality and Naming
The type section is located nearby Tianwadong, Linbang of Longyan County, Fujian.
It was named by Fujian Regional Geological Survey in 1975. nearby Tianwadong, Linbang of Longyan County, Fujian.
Lithology and Thickness
Conglomerate, sandstone. It is mainly composed of grayish-white, purplish-red, grayish purple, light-gray and grayish-green quartz sandy conglomerate, quartz sandstone and siltstone, etc. The total thickness of this formation is about 930 m.
Lithology Pattern:
Coarse-grained sandstone
Relationships and Distribution
Lower contact
This formation overlies unconformably on Pre-Devonian.
Upper contact
This formation has an upper conformable contact with the overlying Taozikeng Fm.
Regional extent
GeoJSON
null
Fossils
It yields plant fossil Cyclostigma kiltokense.
Age
early Late Devonian
Age Span:
Beginning stage:
Frasnian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
378.90
Ending stage:
Frasnian
Fraction up in the ending stage:
1.0
Ending date (Ma):
371.10
Depositional setting
Depositional pattern:
Additional Information
Compiler:
(Wang Shitao)