Yanglinggou Fm
Type Locality and Naming
The type section is located at Yanglinggou of Luohe Village, Xueyang County of Shaanxi Province. It was named by the First Geological Team in 1964 and was published in the Paleontological Atlas, Volume San-Gan-Ning in 1983.
Lithology and Thickness
Sandy limestone. The Formation is divided into three parts: Lower part is composed of grayish-green and yellowish-brown thin- to medium-bedded feldspar quartz sandstone intercalated with purplish-red and grayish-green sandy slate.
Middle part consists of grayish-green to gray calcareous slate with interbeds of thin-bedded bioclastic limestone, dolomitic limestone and feldspar quartz sandstone.
Upper part is characterized by gray to dark-gray thin- to medium-bedded dolomitic limestone, limestone, mudstone and sandy dolomite intercalated with calcareous slate.
It is 595 m in total thickness. The thickness varies from 330 to 1300 m in Xunyang, 219 m in Songsuping of Sahnyang, and more than 298 m in Wafangba of Fenxian.
Relationships and Distribution
Lower contact
The formation rests conformably on the Dafenggou Fm.
Upper contact
Conformably overlain by the Tieshan Fm.
Regional extent
The thickness varies from 330 to 1300 m in Xunyang, 219 m in Songsuping of Sahnyang, and more than 298 m in Wafangba of Fenxian.
GeoJSON
Fossils
The middle and upper parts contain Brachiopoda Stringocephalus sp., Desquamatia sp., Spinatrypa sp.; and Coral Temnophyllum sp., Fasciphyllum sp., Pseudomicroplasma sp., Alveolitella sp.
Age
Depositional setting
It is interpreted as a varying sedimentary environment from restricted platform, open platform to slope margin.
Additional Information