Nanping Fm
Type Locality and Naming
It was named by the No. 109 Party under the Heilongjiang Coalfield Prospecting Company in 1972-1973, and was first cited publicly by the Compiler
Jingeng Sha (coordinator) Group for the Regional Stratigraphic Chart of Heilongjiang Province in 1979. The naming section is represented by the Geological profile of the Taipingchuan Coalfield in the Buhate Banner of Inner Mongolia.
Synonym: （南平组）
Lithology and Thickness
Representing a set of coarse-grained clastic deposits with the conglomerates being predominant ones, being composed essentially of grey-white and grey-green conglomerates, gritstones, poststones (= fine-grained sandstone), mudstones and thin-bedded coal layers, intercalated locally with grey-white tuff, with a thickness of 200-660 m.
Relationships and Distribution
Lower contact
It overlies conformably the Taipingchuan Fm
Upper contact
It is in an unconformable contact with the overlying Longjiang Fm
Regional extent
The formation is distributed extensively mainly in the Taipingchuan-Huifengchuan area of the Butehar Banner, the Erdaoguanmen Mts, the Xinlin Village, the Nanping-Fengrong region and the Boketu-Tamulan Gully of Yakeshi City, with its thickness being changeable greatly.
GeoJSON
Fossils
It yields such plant fossils as Coniopteris hymenophylloides, C. burejensis, C. usedii, C. depensis, Cladophlebis cf. fangtzensis, Czeranowskia rigida, Podozamites lanceolatus and Pityophyllum cf. longifolium, as well as spore-pollen fossils.
Age
Depositional setting
The formation represents deposits with those of fluvial facies being predominant, associated occasionally with lacustrine and swamp-facies deposits.
Additional Information
Age:
Schematic strat column suggests Bathonian-Callovian
Age span:
Beginning stage: Bathonian
Fraction up in beginning stage: 0.0
Beginning date (Ma):
Ending stage: Callovian
Fraction up in ending stage: 1.0
Ending date (Ma):
Depositional setting:
The formation represents deposits with those of fluvial facies being predominant, associated occasionally with lacustrine and swamp-facies deposits.
Depositional-pattern:
Additional Information
Compiler
Jingeng Sha (coordinator)