Yapaqin Gr
Period:
Cretaceous
Age Interval:
Early Cretaceous, (5)
Province:
Xinjiang
Type Locality and Naming
Karakorum. Yapaqin, 10 km east of Chalukou, 70 km west of Tianshuihai, Xinjiang Uygur Autonomous region. Names by Wang Naiwen, 1986, in Hao Yichun et al., 1986 The Cretaceous of China, Beijing, Geological Publishing House.
Lithology and Thickness
Series of dark gray, black massive limestone and shale.
Lithology Pattern:
Clayey limestone
Relationships and Distribution
Lower contact
Disconformity onto the Chongtashi Fm
Upper contact
Disconformably overlain by the Tielongtan Gr (Xiliuokezong Fm)
Regional extent
GeoJSON
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Fossils
Age
Early Cretaceous
Age Span:
Beginning stage:
Aptian
Fraction up in beginning stage:
0.3
Beginning date (Ma):
118.94
Ending stage:
Aptian
Fraction up in the ending stage:
0.9
Ending date (Ma):
114.02
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Wan Xiaoqiao