Guolang Fm
Type Locality and Naming
The naming section at Guolang Village, Dashishao, 4 km northwest of Yunlong County, Yunnan. Named by the First Regional Party of Yunnan Province and Zhu Zhanxiang in 1973.
Lithology and Thickness
Grayish purple sandstone and purple mudstone, the base of which is alternating beds of purplish red, thick-bedded sandstone and calcareous mudstone. The thickness is 302–1620 m
Relationships and Distribution
Lower contact
It has a conformable contact with the underlying Paleogene Yunlong Fm or Paleogene Mengyejing Fm
Upper contact
No top of the formation is found.
Regional extent
The strata equivalent to the Guolang Fm are the Zhaojiadian Fm (in the Yuanmou-Chuxiong area).
GeoJSON
Fossils
It contains abundant fossils, including the charophyte Gyrogona-Raskyaechara flora, the ostracod Pionocypris-Limnocythere assemblage, the gastropods Radix etc., the Estheria Paraleptestheria sp. and sporopollen.
Age
Depositional setting
The formation belongs to fluvio-lacustrine red sandy mudstone, with a thickness of 242–1206 m.
Additional Information