Bazhan Fm
Type Locality and Naming
The type sections are in Nenjiang County, Heilongjiang Province. Type section for the Lower part of formation is located in the Sankuanggou North area. Type section for the Upper part is the Bazhan area (the upper part of the formation) and (the lower part of the formation),. It was named by Ma Jiajun et al., in 1963, and was cited first publicly by the Compiling Group for the Regional Stratigraphic Chart of Heilongjiang Province (1974).
Lithology and Thickness
Clastics. Basal part of the formation consists of variegated metamorphosed conglomerates. Lower part is composed of yellow-green clayey siltstone, intercalated with feldspar-rich greywacke. Upper part is composed of grey shale, grey-green calcareous and silty shales and grey slate. Total thickness is over 1897 m.
Relationships and Distribution
Lower contact
Disconformable contact with the underlying Xiaohelihe Gr. Coeval with Linjatun Fm (also a lacustrine facies) in same region
Upper contact
Regional extent
The formation is distributed in the Bazhan area of Nenjiang County, Heilongjiang Province.
GeoJSON
Fossils
Bivalves are represented by Palaeomutela and Palaeanodonta.
Age
Depositional setting
It is interpreted as clastic deposits of lake facies.
Additional Information