Yanghe Fm
Type Locality and Naming
The naming section is located in a well section at Puhe, Shenyang. Found and named in wells by the Northern Liaoning Party, Liaoning Coal Exploration Co. in 1963.
Synonym: Fuyanghe Fm
Lithology and Thickness
The formation is divided into two parts: Lower part, mainly grayish green, medium to coarse siltstone with variegated fine sandstone and shale. Upper part, dark green, fine gravel-bearing muddy sandstone, fine gravel-bearing sandstone, medium and coarse sandstone, very fine to fine sandy shale and sandy conglomerate. This formation has distinct rhythms, each layer being 5–10 m, which is intercalated with 1–3 thin coal beds. The lithology of the formation varies greatly laterally. Its thickness is generally 153–320 m and may reach a maximum of ~700 m.
Relationships and Distribution
Lower contact
The formation has a disconformable contact with the underlying Eocene Yangliantun Fm. Next older regionally is the Gegjiajie Fm
Upper contact
The formation has an unconformable contact with the overlying Neogene Qiujiatun Fm.
Regional extent
The formation is distributed in the Northern subbasin, Shenyang City, Liaoning.
GeoJSON
Fossils
It contains ostracods, bivalves, gastropods and plants. The gastropods are Gyraulus chihliensis, Pubilla micra and Buliminus cantori; the fossil plants are Castanea sp., Catalpa sp. and Tilia sp..
Age
Depositional setting
Additional Information