Tomorlog Fm
(4), mid-Middle Permian
Type Locality and Naming
The type section is located in the Hetao area of the Tomorlog, Xinyuan County, Xinjiang Uygur Autonomous Region. It was named by the 1st Party under the Xinjiang Regional Geological Survey Expedition in 1975.
Synomym: Tiemulike Fm (spelling conversion)
Lithology and Thickness
Conglomerate and Sandstone. Divided into two subformations: The First Subformation: Its lower part (the Turgong River section) is composed of purple and dark-grey-purple conglomerate, sandstone and calcareous coarse-grained sandstone, with a visible thickness of 219 m; the upper part of the subformation (the Qiatebulak section) is composed of grey-purple and grey-yellow calcareous feldspar lithoclastic fine-grained sandstone and sandstone, intercalated with calcareous pebbled coarse-grained sandstone and dark-grey calcareous siltstone, with a visible thickness of 1949 m. The Second Subformation is composed of light-purple and brown conglomerates, intercalated with interbeds of grey and yellow-brown coarse-grained sandstone and conglomerate, with its top part being composed of yellow-grey pebbled feldspar-lithoclastic sandstone, coarse-grained sandstone and conglomerate, with a visible thickness of 579.5 m. The Second subformation is in a conformable contact with the lower First subformation.
Relationships and Distribution
Lower contact
unconformable contact with the underlying Wulang Gr
Upper contact
conformable contact with the overlying Barsirgan Fm
Regional extent
distributed in the eastern end of the Awulale Mt., in the area to the south of the Yili Basin, in the Yishikilike Mt., the Jiaowur Mt. and the Zhaosu-Tekes Basin.
GeoJSON
Fossils
The lower part of the First subformation yields bivalves such as Palaeanodonta pseudolongissima, P. subcasfer, Palaeomutella sp., Oligodon? sp.
Age
Depositional setting
It is interpreted as a pediment river-facies.
Additional Information