Chugouyu Fm
Period:
Paleogene
Age Interval:
Middle Eocene, (17a)
Province:
Henan
Type Locality and Naming
The naming section is located at Chugouyu, Lushi County, Henan, and the reference section is situated in the vicinity of Hejiagou in a small basin at Dayu. Named by Tong Yongsheng and Wang Jingwen in 1980.
Lithology and Thickness
Sequence of variegated mudstone, sandy mudstone and marlstone and interbedded sandstone and conglomerate, with lignite beds in the upper part. The thickness may reach 700 m.
Lithology Pattern:
Sandy claystone
Relationships and Distribution
Lower contact
Conformable contact with the underlying Eocene Lushi Fm.
Upper contact
Conformable contact with the overlying ?Oligocene Dayu Fm.
Regional extent
GeoJSON
null
Fossils
Archaeomeryx optatus, Eomoropus major, Breviodon sp. and Forstercooperia sp. have been found, of which the first two species are only seen in the Xar Moron-aged fauna in other areas.
Age
The age of this formation was suggested to be Middle Eocene.
Age Span:
Beginning stage:
Lutetian
Fraction up in beginning stage:
0.7
Beginning date (Ma):
43.14
Ending stage:
Bartonian
Fraction up in the ending stage:
0.9
Ending date (Ma):
38.04
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Tao Deng, Yuanqing Wang, Qian Li, et al.