Dayangshan Fm
Period:
Carboniferous
Age Interval:
C1 (27), Early Carboniferous
Province:
Henan
Type Locality and Naming
The type section is at Dayangshan, the Yangshan Coal Mine, Gushi County, Henan. It was named by the No. 11 Geological Party of Henan Province in 1971.
Lithology and Thickness
Conglomerate. Characterized by very thick quartzose conglomerate intercalated with sandstone lenses. Around Liulin of Gushi, it is 176 m thick.
Lithology Pattern:
Conglomerate
Relationships and Distribution
Lower contact
Disconformable contact with the underlying Gushi Fm
Upper contact
Conformable contact with the overlying YangshanHenan Fm
Regional extent
GeoJSON
null
Fossils
In the limestone conglomerate are contained coral Heliolites cf. anhuiensis, conodont Pancerodus gracilis, etc. Around Liulin of Gushi, the siltstone interbeds contain spore-pollen Crassispora? sp., etc.
Age
Early Carboniferous
Age Span:
Beginning stage:
Visean
Fraction up in beginning stage:
0.0
Beginning date (Ma):
346.73
Ending stage:
Visean
Fraction up in the ending stage:
0.8
Ending date (Ma):
333.62
Depositional setting
It is interpreted as a gray marine-continental molasse
Depositional pattern:
Additional Information
Compiler:
Wang Rennong