Xining Gr
Period:
Paleogene
Age Interval:
Eocene to early Oligocene, (6c)
Province:
Gansu, Qinghai
Type Locality and Naming
Lanzhou-Xining region. Includes (depending on chart) the Yehucheng Fm and coeval Mahalagou Fm and the underlying Xiliugou Fm. Named after Xining region.
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Lithology and Thickness
Conglomerate followed by gypsiferous claystone. See component formations.
Lithology Pattern:
Gypsiferous claystone
Relationships and Distribution
Lower contact
It has an unconformable contact with the underlying Cretaceous Hekou Gr.
Upper contact
It has a conformable contact with the overlying Xiejia Fm
Regional extent
Lanzhou-Xining region.
GeoJSON
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Fossils
Age
Eocene and early Oligocene
Age Span:
Beginning stage:
Ypresian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
56.00
Ending stage:
Rupelian
Fraction up in the ending stage:
0.5
Ending date (Ma):
30.60
Depositional setting
Depositional pattern:
Additional Information
Compiler: