Kalundar Fm
(22), late-Early and mid-Middle Permian
Type Locality and Naming
The type section is located at Subash to the west of Keping County, Xinjiang. It was named by Groeber P. in 1914.
Lithology and Thickness
Siltstone. Its base is composed of grey-green and deep-red calcareous greywacke, feldspar-lithoclastic sandstone, clayey limestone and bioclastic limestone. Lower part is composed of interbeds of grey-green, grey-yellow-green, deep-red and light-purple-grey calcareous fine-grained sandy siltstone, silty siltstone and calcareous silty fine-grained sandstone. Upper part is composed of grey-green and deep-red siltstone, yellow-green sandstone and siltstone. Total thickness is 751 m
Relationships and Distribution
Lower contact
Conformable contact with the upper limestone part of the underlying Baliqliq Fm
Upper contact
Unconformable contact with the overlying Quaternary System
Regional extent
In the western part on the slope of the Piqiang Mt. the thickness of the formation is of 35 m; in the eastern segment of the Kepingtag the formation is composed mainly of deep-red clastic rocks, with a thickness of 650 m; in the area of the Sulphur Plant at Arqia the thickness of the formation is of 76 m. The formation is thicker in the Subashi area and the eastern segment of Kepingtag, and is gradually getting thinner towards both the eastern and western sides of the region.
GeoJSON
Fossils
The Lower part of the formation yields Ostracoda as represented by Sulcella sp., and Geisina sp., Foraminifera represented by Globivalvulina sp. and Glomospira sp.; Spore-pollen represented by the Potonieisporites-Vittatina assemblage; and Bivalves such as Sanguinolites sp., etc.
Age
Depositional setting
It is interpreted as delta-facies deposits, with an upward transition from littoral-facies deposits to continental-facies deposits.
Additional Information