Gelanghe Fm
Period:
Paleogene
Age Interval:
probably Middle Eocene , (20a)
Province:
Yunnan
Type Locality and Naming
The naming section is located in the vicinity of Gelanghe near Caijiachong in the Yuezhou basin, Qujing County, Yunnan. Named by Wang Banyue and Zhang Yuping in 1983.
Lithology and Thickness
Primarily brownish red, thick-bedded mudstone and siltstone, containing calcareous concretions and gravels, the base of which is brownish red conglomerate and sandy conglomerate. It is >30 m thick.
Lithology Pattern:
Claystone
Relationships and Distribution
Lower contact
Unconformable contact with the underlying Triassic Yangxin Fm limestone.
Upper contact
Unconformable contact with the overlying Middle to Late Eocene Caijiachong Fm.
Regional extent
GeoJSON
null
Age
Wang, Y.Q. et al. (2019; Paleogene integrated stratigraphy and timescale of China) show it as mid-Lutetian to early Bartonian.
Age Span:
Beginning stage:
Lutetian
Fraction up in beginning stage:
0.5
Beginning date (Ma):
44.55
Ending stage:
Bartonian
Fraction up in the ending stage:
0.4
Ending date (Ma):
39.70
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Tao Deng, Yuanqing Wang, Qian Li, et al.