Gedang Fm
Type Locality and Naming
The type section is located at Gedang Village of Funing County, Yunnan Province. It was named by Second Team of Yunnan Geological Survey in 1978 and quoted officially by Hou H. F. et al., in 1988.
Lithology and Thickness
The formation is dominated by light grayish thick-bedded oolitic limestone above and light gray with pink color unequal thick clastic limestones below. It is 674.5 m thick.
Relationships and Distribution
Lower contact
Conformable contact with the underlying Donggongling Fm, but the boundary is not well-defined.
Upper contact
Its upper contact with overlying Huanglong Fm dolomitic limestone of Carboniferous is disconformable.
Regional extent
It is widely distributed in Mengzi, Xizhu, Funing, Yanshan and Qiubei areas of southeastern Yunnan
GeoJSON
Fossils
The fossils are very rare in the upper part but relatively rich in the lower part, characterized by brachiopods including Tenticospirifer vilis, Pugnax sp., Atrypa sp.and Cyrtospirifer sp.
Age
Depositional setting
The lithology and faunas indicate an open carbonate platform environment with oolitic bank facies.
Additional Information