Gengjiajie Fm
Type Locality and Naming
Established by the Compilation Team of the Regional Stratigraphic Table of Liaoning Province in 1978, and age is Oligocene. The naming section is well Lao 55-11 section at Gengjiajie, North Laohutai, Fushun coalfield, Liaoning.
Lithology and Thickness
Sequence of brown, thick-bedded shale with small amounts of variegated, thin-bedded sandstone, fine sandstone, shale and green mudstone. The thickness is 110–338 m.
Relationships and Distribution
Lower contact
It was deposited continuously with the underlying Eocene Xilutian Fm.
Upper contact
Unconformable contact with the overlying Quaternary. Next younger regional is Yanghe Fm.
Regional extent
This formation is distributed in wells in the vicinity of Gengjialie, Fushun coalfield, Liaoning.
GeoJSON
Fossils
The sporopollen assemblage displays marked similarities and continuity with the Xilutian Formation. The assemblage is dominated by pollen of angiosperms, of which the mid-late Eocene Sangou Quercoidites content is highest and next comes Ulmipollenites, and in addition there are also Taxidoiaceaepollenites and Ephedripites.
Age
Depositional setting
Additional Information