Lianglitag Fm
Type Locality and Naming
The type section is in roadcuts from Yijianfang to Tangwangcheng, near 1186 km-road sign at the Wu-Yi highway in Xinjiang (40°N, 78°30'E). The Lianglitag Fm was named by Zhou Zhiyi in 1990.
Synonym: (良里塔格组）
Lithology and Thickness
The Formation is composed of light gray thick-bedded calcirudite, calcarenite and algal limestone. In the type area, the Lianglitag Fm is 61 m thick.
Relationships and Distribution
Lower contact
It rests conformably on the nodular limestone of the Tumxuk Fm
Upper contact
It is disconformably overlain by the Kepingtag Fm of early Silurian, or underlies the Sangtamu Fm of latest Ordovician.
Regional extent
The Lianglitag Fm is exposed in area east of Sanchakou and Tanghuangcheng-Yijianfang (Zhou et al., 1990).
GeoJSON
Fossils
This formation yields conodont Belondina confluens. Additionally, trilobite Dulanaspis, brachiopod Camerella sp. and gastropod Maclurites sinkiangensis have been also found from the Lianglitage Fm.
Age
Depositional setting
It represents marginal carbonate swells on platform setting.
Additional Information