Shuixigou Gr
Type Locality and Naming
Junggar and Turfan-Hami Basins. It was named by Yuan Fuli as the Shuixigou Horizon in 1928, and was first applied officially in 1935. The naming locality is situated at Shuixi Gully of Jimusar County, Xinjiang. Consists of the upward succession of the Badaowan Fm, Sangonghe Fm and Xishanyao Fm.
Synonym: （水西沟群）
Lithology and Thickness
It represents coal-bearing deposits, composed of grey-green and grey sandstone and mudstone. At the naming locality the particular formation is composed of grey-green and grey-white sandstones, grey-green and grey-black mudstones and sandy mudstone, intercalated with conglomerate, coal-bearing beds and siderite ores, with a thickness of 636-2316 m. See component Badaowan Fm, Sangonghe Fm and Xishanyao Fm for details.
Relationships and Distribution
Lower contact
It is in an unconformable or a disconformable contact with the underlying late Triassic Xiaoquangou Gr (Haojiagou Fm).
Upper contact
Regionally, the next younger unit is indicated as Toutunhe Fm
Regional extent
The particular formation is distributed extensively in the Junggar, Tulufan-Hami, Yining and Santanghu Basins. Its lithology in various regions is alike, yet with greater changes in its thickness, with the greatest thickness of it being of 3000 m, and with the minor thickness of only 133 m.
GeoJSON
Fossils
It yields abundant plant and bivalve fossils, as well as a small amount of conchostraca and fish fossils. See component Badaowan Fm, Sangonghe Fm and Xishanyao Fm for details.
Age
Depositional setting
Additional Information