Bangchuigou Fm
Type Locality and Naming
Songliao Basin east. In 1980 the Regional Geological Survey Party, Jilin Bureau of Geology, named the coal-bearing green member in the lower part of the original Shulan Formation as the Bangchuigou Formation. The naming section is located at Dongfu Bangchuigou 7 km southwest of the seat of Shulan County, Jilin Province.
Lithology and Thickness
Pebbly sandstone and sandstone with claystone. In addition to clay minerals there are thin coal beds. It is characterized by a rock association of gray and grayish sandstone and siltstone containing clays of commercial value and thin coal beds.
Relationships and Distribution
Lower contact
Disconformably or unconformably overlies the Paleocene Gangyao Fm, or unconformably overlies the late Variscan granite body.
Upper contact
The formation conformably or disconformably underlies the Eocene Shulan Fm
Regional extent
This formation is distributed at Dakouqin, Qianyao, Gangyao, Wapengyao and Bangchuigou, Shulan County.
GeoJSON
Fossils
Pollen of angiosperms predominates in sporopollen, while pollen of gymnosperms and spores of pteridophytes are scarce, mainly including Alnipollenites, Quercoidites and Betulaceoipollenites.
Age
Depositional setting
It was deposited in a lake environment under the wet climatic and still water conditions.
Additional Information