Magongtan Fm
Type Locality and Naming
It was named by Mu Enzhi et al. in 1983. The type section is at Magongtan, north of the Shuanghe Township, Changning County in southwestern Sichuan Province.
Synonym: (马公滩组)
Lithology and Thickness
The Lower and Middle parts of the formation, 206 m thick, are composed of interbeds of yellow green mudstone with silty mudstone; the sandy component increases gradually upwards and sandy mudstone with rich trace fossils is developed as well. The Upper part, 74 m thick, consists of blue gray, or brownish yellow by weathering, medium- and thick-bedded quartzose sandstone with no fossils found yet.
Relationships and Distribution
Lower contact
The Magongtan Fm rests conformably onto the underlying Lingxiqiao Fm
Upper contact
The Magongtan Fm rests conformably below the overlying Xiushan Fm
GeoJSON
Age
Depositional setting
Additional Information