Huangyanggou Fm
Period:
Neoproterozoic
Age Interval:
late Nanhuan (late Cryogenian), Nh (8)
Province:
Xinjiang
Type Locality and Naming
Kuruktag region. Kurktag west of the Yuli County, Xinjiang Weiwuerzhu Zizhiqu (Xinjiang Uygur Autonomous Region). The Middle formation of the Kuruktag Gr (4 of 9). No details yet provided.
Lithology and Thickness
The Huangyangou Fm is indicated on the stratigraphic column as ca. 21 m of limestone and siltstone. Often absent between the Alatonggou Fm and Teruiaken Fm. No details yet provided.
[Figure: Stratigraphic Column of the Kuruktag Gr]
Lithology Pattern:
Sandy limestone
Relationships and Distribution
Lower contact
The formation is conformable onto the underlying Aletonggou Fm.
Upper contact
The upper part of the formation is unconformable or disconformable with the overlying Teruiaiken Fm tillites.
Regional extent
Kuruktag region.
GeoJSON
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Fossils
Age
late Nanhuan (late Cryogenian), interpreted as part of interglacial between the Sturtian and Marinoan glacials.
Age Span:
Beginning stage:
Cryogenian
Fraction up in beginning stage:
0.8
Beginning date (Ma):
652.00
Ending stage:
Cryogenian
Fraction up in the ending stage:
0.94
Ending date (Ma):
640.10
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Extracts from The Neoproterozoic Erathem (chapter in Stratigraphic Lexicon of China, draft of 2022) by Gao Linzhi, Ding Xiaozhong, Zhang Chuanheng, Zhang Heng.