Bailiuping Fm
Period:
Devonian
Age Interval:
D13 (70); Early Emsian (middle Early Devonian)
Province:
Sichuan
Type Locality and Naming
The type section is located near Bailiuping village, 2 km east of Ganxi village in Beichuan County, Sichuan Province. It was named by Chen Yuanren in 1978.
Lithology and Thickness
Siltstone. The formation is mainly composed of yellowish-green siltstone and mudstone. At the top, it is intercalated with bioclastic limestone and yields small size brachiopods.
Lithology Pattern:
Continental marl
Relationships and Distribution
Lower contact
Conformable contact onto the quartz sandstone of the Guanshaopo Fm of the Pingyipu Group.
Upper contact
Regional extent
GeoJSON
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Fossils
The formation contains small size brachiopods: Protochonetes bailiupingensis, Orientospispirifer nakaolingensis, O. wangi; ostracods: Sulcella sichuanensis; trilobites: Caracricalymere ganxiensis; and conodonts: Polygnathus dehiscens.
Age
Early Emsian (middle Early Devonian)
Age Span:
S
Beginning stage:
Pragian
Fraction up in beginning stage:
0.5
Beginning date (Ma):
411.46
Ending stage:
Emsian
Fraction up in the ending stage:
0.2
Ending date (Ma):
407.27
Depositional setting
Shore to shallow shelf
Depositional pattern:
Additional Information
Compiler:
(Wang Shitao)