Kuquan Fm
Period:
Neogene
Age Interval:
Miocene, N, (6a)
Province:
Gansu
Type Locality and Naming
Hexi corridor (Gansu-Qinghai). Located in the northeast of Kuquan Village east of Xingxingxia in the Northern Subei Mongolia Autonomous County. Named by Zhang Mingshu in 1964.
Lithology and Thickness
Lithologically orange-red sandy mudstone with variegated mudstone and sandy conglomerate, locally intercalated with fresh-water limestone lenses containing salts and gypsum. The thickness is 10–246 m.
Lithology Pattern:
Sandy claystone
Relationships and Distribution
Lower contact
Its base is not observed. Next older regional unit is Hongya Fm.
Upper contact
Regional extent
GeoJSON
null
Fossils
Gastropods: Pseudophysa, Bithynia;
Age
The age is probably Neogene.
Age Span:
Beginning stage:
Zanclean
Fraction up in beginning stage:
0.0
Beginning date (Ma):
5.34
Ending stage:
Gelasian
Fraction up in the ending stage:
1.0
Ending date (Ma):
1.80
Depositional setting
Lacustrine deposits.
Depositional pattern:
Additional Information
Compiler:
Tao Deng, Sukuan Hou, J.Z. Qigao, Q. Li, Q.Q. Shi, B.Y. Sun, S.Q. Wang, F.X. Wu