Huangshanjie Fm
Type Locality and Naming
The type section is located at Huangshanjie, Fukang County, Xinjiang Uygur Autonomous Region. It was named by Tang Zukui et al. in 1957. Middle formation in the Xiaoquangou Gr.
Synonym: It was named Huangshan Street Layer when it was named, and the age was set as the Late Triassic World. In 1960, Yang Shizhong was renamed the formation. In 1981, the Xinjiang Uygur Autonomous Region Regional Stratigraphic Table Compilation Group only referred to the lower part of this group as the Huangshanjie Formation.
Lithology and Thickness
It is composed of gray, gray-green, gray-black fine sandstone, siltstone, mudstone interbedded, interbedded with gray thin limestone, and black carbonaceous shale at the bottom. There are yellow-green sandstones with conglomerate at the bottom near Huangshan Street and Urumqi. The thickness is 371.3 m.
Relationships and Distribution
Lower contact
The bottom is marked by black carbonaceous shale, which is conformable contact with the underlying Karamay Fm (Kelamayi Fm). Some glutenites (= gravel-sediment) in some areas may be false conformable contact.
Upper contact
The top is conformable contact with the Haojiagou Fm
Regional extent
This formation is widely distributed and can be seen in the outcrops and boreholes of the Junggar Basin, Turpan Basin, and Tarim Basin. The thickness varies between 91-442 m.
GeoJSON
Fossils
Fish fossils: Fukangolepts barbarous, Bogdania fragmenta, Fukangichthys longidorsalis; Plants: Danaeopsis sp., Neocalamites carrera, Thinnfeldia sp., Todites shensiensis; Arthropods: Jeanriaeruyn sornayi, Ketmenia koramica, K. spp., Kungeja sinuala, K. spp., and insects; Microspores: Dictyophyllidites-Apiculatisporites- Nanstrate bissacate assemblage; Megaspores: Truleites vulgaris-Hughesisporites gibbosus-Triletes pinguis assemblage.
Age
Depositional setting
It is interpreted as lacustrine deposits.
Additional Information