Nantianmen Fm
Period:
Cretaceous
Age Interval:
Cenomanian, (25a)
Province:
Hebei
Type Locality and Naming
N. Hebei. Nantianmen (Nantienmen) close to Zhangjiakou, Hebei Province. Named by Barbour G B, 1924, Preliminary Observation in the Kalgan Area, Bull. Geol. Soc. China, 3(2): 153–168.
Synonym: Wanchuan Fm, Nantienmen Fm
Lithology and Thickness
Sandstone and conglomerate with cross-bedding
Lithology Pattern:
Coarse-grained sandstone
Relationships and Distribution
Lower contact
Shown by D.P. Xi, X.Q. Wan et al. (2019; Cretaceous chapter of China Integrated Stratigraphy and Timescale) as overlying the Qingshila Fm.
Upper contact
Major disconformity below Cenozoic.
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:
0.5
Ending date (Ma):
97.20
Depositional setting
Depositional pattern:
Additional Information
Compiler: