Tuokuzidaban Gr
Type Locality and Naming
The type section lies on the north slope of Tuokuzidaban Mt. in southern Aqqan, Qiemo County, Xinjiang. It was named by Zhang Yuqian in 1972, and formally cited in The Paleozoic Erathem of Xinjiang in 1991.
Lithology and Thickness
Clastics, Volcanics and Volcaniclastcs, and Limestone. A suite of neritic clastic rock and pyroclastic rock formations, intercalated with plenty of intermediate-basic eruptive rocks and carbonate rocks: gray-white, gray-black, gray-green and purple-brown clastic rocks as well as gray-green and gray-purple pyroclastic rocks and volcanic rocks intercalated with gray-white and gray-black limestones. Thickness 3320 m. The facies variation is characterized by dominance of normal terrigenous clastic rocks intercalated with minor volcanic rocks in the East Kunlun, clastic rocks and pyroclastic rocks intercalated with carbonate rocks in the Middle Kunlun; and development of volcanic rocks in the West Kunlun. The thickness tends to become thinner from west to east.
Relationships and Distribution
Lower contact
Conformable contact with the underlying Bulakbashi Gr. But, regionally, it is in disconformable contact with the underlying strata.
Upper contact
Conformable contact with the overlying Karamiran Gr. But, regionally, it is in disconformable contact with the overlying strata.
Regional extent
Distributed mainly along Arpa, Kepa and Aqqan to Tula, on the north slope of Tuokuzidaban Mt. in the eastern segment of West Kunlun; and also exposed in such areas as the upper Qarqan River, south of the Guerpen Mountain Pass, Wusitengtag and the upper Yurungkax River, roughly in a NE trend.
GeoJSON
Fossils
Contains Corals Gangamophyllum sp., Lithostrotion sp., Dibunophyllum sp., Auloclisia sp. and Palaeosmilia sp.; Brachiopods Dictyoclostus, Gigantoproductus, Striatifera, Linoproductus, etc.
Age
Depositional setting
It is interpreted as a neritic facies with volcanics.
Additional Information