Gudaoling Fm
Type Locality and Naming
The type section is located near Gudaoling on the border between Zhashui and Zhen’an counties, Shaanxi Province. It was named by Zhao Yazeng and Huang Jiqing in 1931.
Lithology and Thickness
Conglomerate, limestone. The lithology is characterized by a Basal 9.2-m-thick conglomerate and sandy conglomerate intercalated with sandy slate; Lower part of clayey limestone and bioclastic micrite. Upper part of clayey banded limestone and thick-bedded crystalline limestone intercalated with calcareous slate and with some reef limestone breccia seen in the topmost part. The thickness is 412 to 767 m in total.
Relationships and Distribution
Lower contact
It overlies disconformably on the Shiping Fm of the Middle Devonian.
Upper contact
Disconformably overlain by the Gedasi Fm flysch deposits.
Regional extent
GeoJSON
Fossils
In the lower part, it yields brachiopods Tenticospirifer, Cyrtospirifer; coral Disphyllum; and conodonts Ancyrodella rotundiloba, Palmatolepis hassi.
Age
Depositional setting
It is interpreted as a submerged fan changing upward into a biohermal facies.
Additional Information