Houfulongshan Fm
Type Locality and Naming
The type section is located at Houfulong Mountain, Nanpiao Shaguotun, Liaoning Province. It was named by Zhang Wu and Dong Guoyi in 1982.
Synonym: Fulongshan Fm
Lithology and Thickness
It is composed of yellow, yellow-green, gray and gray-black conglomerate, siltstone and silty mudstone, mixed with gray-white tuff. The thickness is 3.8-63.4m.
Relationships and Distribution
Lower contact
It is false conformable contact with the underlying Upper Permian Sunjiagou Fm or Lower Triassic Hongli Fm
Upper contact
In western part of Liaoning province, it is disconformably overlain by the Laohugou Fm
Regional extent
This Formation is mainly distributed in the area from Nanpiao Shaguotun to Fulong Mountain and Shimengou, Chaoyang County.
GeoJSON
Fossils
Bivalves: Shaanxiconcha cf. subovata, S. triangulata, Plant fossils: Dictyophyllum nathorsti, Hausmanma sp., Neocalamites carrerei. No biological fossils were found in this group in the past, so the formation was often included in the underlying Hongla Fm. In 1964, Li Xingxue determined it to be the Late Permian. In 1982, Zhang Wu and Dong Guoyi named part of the original Hongla Fm as the Houfulongshan Fm based on bivalves, and determined its age as the Middle Triassic.
Age
Depositional setting
It is interpreted as shallow lake deposits.
Additional Information