Dazhaimen Fm
Period:
Devonian
Age Interval:
Late Devonian (29)
Province:
Yunnan
Type Locality and Naming
The third team of the Yunnan Regional Geological Survey Brigade, named in 1980.
Lithology and Thickness
It is a set of siliceous rocks. Including brachiopods, etc.
Lithology Pattern:
Chert
Relationships and Distribution
Lower contact
The formation lies conformably on the underlying marl of the Heyuanzhai Fm (Fault contact).
Upper contact
Xiangshan Fm (Parallel Unconformable Contact).
Regional extent
Tengchong Block
GeoJSON
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Fossils
Age
Late Devonian; Late Frasnian Epoch (Qie et al. 2019)
Age Span:
Beginning stage:
Frasnian
Fraction up in beginning stage:
0.2
Beginning date (Ma):
377.34
Ending stage:
Famennian
Fraction up in the ending stage:
0
Ending date (Ma):
371.10
Depositional setting
Depositional pattern:
Additional Information
Compiler:
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.