Jiangbasitao Fm

The type section is at Jiangbasitao, north of Zhifang, Barkol County, Xinjiang. It was named by Li Tiande et al. in 1977, and formally cited in The Paleozoic Erathem of Xinjiang in 1991.

Coarse-grained sandstone with pyroclastics. Gray-green to gray-yellow-green terrigenous clastic rocks and pyroclastic rocks, in which there are high contents of very coarse-grained sandstone and feldspar-rich coarse-grained sandstone; with a thickness of 769.6 m. Eastward to the south of Yiwu County and Dongquan, the rocks change moderately, dominated by tuffaceous sandstone, tuffaceous sandy conglomerate and tuff intercalated with carbonaceous shale and carbonaceous-clayey sandstone; 603−1858.5 m thick; containing brachiopod Syringothyris sp., etc. Going westward, the strata are not completely exposed, being only 357 m thick at Heishantou of Jimunai, and reaching 1503 m thick south of Fuyun.

Contains abundant Brachiopods: Linoproductus kokdscharensis, Fluctuaria camriniformis, Syringothyris altaica and Pustula sp.; coral Michelinia sp.; Plants Calamites sp. and Lepidodendropsis sp. as well as gastropods and bivalves

It is interpreted generally as neritic facies for the lower and middle parts, and littoral facies for the upper part, with coarser grain sizes.