Minglang Fm
Period:
Triassic
Age Interval:
Late Early Triassic, (TJ48)
Province:
Yunnan
Type Locality and Naming
The type section is located in Bawei, Mingliang (Minglang) Township, Yongde County, Yunnan Province. The reference section is located at Pianhe, Muchang Township, Zhenkang County. It is named by the Third District of Yunnan Bureau of Geology and Mineral Resources (1989).
Synonym:
Lithology and Thickness
It is mainly composed of silt-crystal and pallite limestone, and the top and bottom are divided by limestone and the overlying and underlying dolomite.
Lithology Pattern:
Limestone
Relationships and Distribution
Lower contact
It has conformable contact with the underlying Bawei Gr (Bawei Fm)
Upper contact
It has false conformable contact with the Hewanjie Gr (Hewanjie Fm)
Regional extent
GeoJSON
null
Fossils
Conodont: Parachirognathus delicatulus, P. geiseri, Pachycladina obliqua
Age
Tong et al. (2019, Triassic integrated stratigraphy and timescale in China, Science China: Earth Sciences, v. 62, no. 1) assign it as spanning the Olenekian.
Age Span:
Beginning stage:
Olenekian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
249.88
Ending stage:
Olenekian
Fraction up in the ending stage:
1.0
Ending date (Ma):
246.70
Depositional setting
Shallow offshore water deposits
Depositional pattern:
Additional Information
Compiler:
Zhang Shunxin, Sun Xin and Tong Jinnan.