Chongtashi Fm
Period:
Jurassic, Cretaceous
Age Interval:
late Jurassic, Early Cretaceous, (5)
Province:
Xinjiang
Type Locality and Naming
Karakorum. Chongtashi in Kunlun Mountains, Pamir District, Xinjiang Uygur Autonomous region. Named by Jiang Zhongti, 1979, Outline of Cretaceous of Qinghai-Tibet Plateau, No4 Tibet Geology Team.
Synonym: maybe Chhongtash Fm (India side of eastern Karakoram, but it is reported to have Permian palynomorphs), Kalakashi Fm (WangNaiwen, 1986); Bagongbulansha Fm
Lithology and Thickness
Dark calcareous sandstone and shale, limestone and Lateritic red conglomerate.
Lithology Pattern:
Clayey sandstone
Relationships and Distribution
Lower contact
Lower Chongtashi Fm continues into Jurassic
Upper contact
Regional extent
GeoJSON
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Fossils
Age
Base age not given in Cretaceous Lexicon or charts; but begins in upper Jurassic.
Age Span:
Beginning stage:
Kimmeridgian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
154.78
Ending stage:
Hauterivian
Fraction up in the ending stage:
1.0
Ending date (Ma):
126.50
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Wan Xiaoqiao