Xainza Fm
Type Locality and Naming
The type section is along the ridge at the right side of the Bango-Xainza Highways, between Gangmusang and Mendeema, 10 km south of Yougzhuzangbu Bridge in Xainza County, Xizang. The Xainza Fm was named by Ni Yunan et al. in 1981.
Synonym: (申扎组) , Shenzha Fm (spelling)
Lithology and Thickness
The formation is composed of dark gray marl and earthy-yellow calcareous mudstone. In the type area, the Xainza Fm is 8.7 m thick.
Relationships and Distribution
Lower contact
It rests conformably on the nodular chert limestone at the top of the Gangmusang Fm
Upper contact
It is conformably overlain by the Lower Dewuka Fm (Dewukaxia Fm) of Llandovery age.
Regional extent
Only in the type area see this formation.
GeoJSON
Fossils
This stratigraphic unit yields graptolites Glyptograptus ? cf. persculptus, Normalograptus extraordinarius, N. bohemicus and brachiopods Hirnantia, Kinnella, Cliftonia, Paromalomena.
Age
Depositional setting
Additional Information