Shabajiao Fm
Period:
Devonian
Age Interval:
D13 (29), Early Devonian
Province:
Yunnan
Type Locality and Naming
The type section is located at Malutang, Shidian County of Yunnan Province. It was named by the No. 3 Team of the No.1 Yunnan Regional Geological Survey in 1980.
Synonym: Shabajio Dolomite
Lithology and Thickness
Dolomite. The Shabajiao Formation, 200 m thick, consists of coarse-grained dolomite and dolomitic limestone.
Lithology Pattern:
Dolomite
Relationships and Distribution
Lower contact
It rests conformably on the Wanjiacun Fm.
Upper contact
Regional extent
It is distributed in areas of Baoshan and Shidian, western Yunnan.
GeoJSON
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Fossils
The Shabajiao Formation yields the conodont Polygnathus perbonus.
Age
Early Devonian; Pragian to Emsian (Qie et al., 2019)
Age Span:
Beginning stage:
Pragian
Fraction up in beginning stage:
0.8
Beginning date (Ma):
410.89
Ending stage:
Emsian
Fraction up in the ending stage:
0.5
Ending date (Ma):
402.41
Depositional setting
It is interpreted as a lagoon environment
Depositional pattern:
Additional Information
Compiler:
(Xian Shiyuan; Wen Du- modified from Qie, Wenkun, Xueping Ma, Honghe Xu, Li Qiao, Kun Liang, Wen Guo, Junjun Song, Bo Chen, and Jianfeng Lu. 2019. Devonian Integrative Stratigraphy and Timescale of China. Science China Earth Sciences 62 (1): 112–34. https://doi.org/10.1007/s11430-017-9259-9.)