Zhongning Fm
Period:
Devonian
Age Interval:
D3 (20-east), Late Devonian
Province:
Ningxia
Type Locality and Naming
The type section is located at Shixia Valley of Baima Village, Zhongning County of Ningxia Hui Autonomous Region. It was named by Pan Jiang and others in 1980.
Lithology and Thickness
Sandstone. The Formation is composed of purplish-red, grayish-green and white coarse- and fine-grained feldspar quartz sandstone and siltstone, occasionally intercalated with thin-bedded sandy limestone. The Formation is about 300 m thick.
Lithology Pattern:
Sandstone
Relationships and Distribution
Lower contact
It has an unconformable basal contact to the underlying Shixiagou Fm.
Upper contact
It has a disconformable upper contact with the overlying Yanghugou Fm of Carboniferous.
Regional extent
GeoJSON
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Fossils
It contains Fish fossils Remigolapis zhongningensis, R. major; and Plant fossils Lepidophloeum rhombicum, Sublepidodendron mirabile.
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
Compiler:
(Wang Shitao)