Daerdang Fm
Period:
Cretaceous
Age Interval:
Early Cretaceous, (32b)
Province:
Sichuan
Type Locality and Naming
Sichuan Basin – south. Da’erdang in Sichuan Province; named by Sichuan Air Geological Survey Team, 1980, Explanatory Text for 1:200 000 Scale Geological Map: Langzhong, Deyang, Santai, Jianyang and Zigong Sheet; for a component formation within the Jiading Gr.
Synonym: Daerdan Fm, Da'erdan Fm, Da'erdang Fm
Lithology and Thickness
The Daerdan Formation (>500 m) consists of brownish-red massive sandstones with large-scale cross-bedding.
Lithology Pattern:
Sandstone
Relationships and Distribution
Lower contact
On regional stratigraphic columns, the next older unit is the Wotoushan Fm.
Upper contact
On regional stratigraphic columns, the next younger unit is the Sanhe Fm.
Regional extent
GeoJSON
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Fossils
Age
Age Span:
Beginning stage:
Cenomanian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
100.50
Ending stage:
Cenomanian
Fraction up in the ending stage:
1.0
Ending date (Ma):
93.90
Depositional setting
Depositional pattern:
Additional Information
Compiler: