Nanhao Fm
Type Locality and Naming
The type section is located at Nanhao Village, Baoting, Hainan, and the reference section lies by the highway from Maogan to the Nanhao Cement Plant in Baoting. It was named by the Geological Party of Hainan in 1976.
Lithology and Thickness
Siltstone and Sandstone. Dominated by light-gray, gray-brown and gray-white sericite siltstone (phyllitic structure), quartz sandstone and silty slate, with pebbly quartz sandstone or siliceous conglomerate at bottom. Thickness >218 m.
Relationships and Distribution
Lower contact
Unconformable contact with the underlying Silurian Zusailing Fm (Xu Shouyong et al., 1992) is an interpretation.
Upper contact
Uncertain: Its relationship with the overlying stratum is unclear. Next younger regional unit is the Qingtianxia Fm sandy claystone
Regional extent
Distributed only in Baoting County
GeoJSON
Fossils
Containing brachiopods Eochoristites, Cyrtospirifer, Fusella, Tenticospirifer, Ptychomaletoechia, etc. and crinoid stems.
Age
Depositional setting
It is interpreted as littoral-neritic deposits
Additional Information