Wutong Fm
Type Locality and Naming
The type section is located at Wutongshan, northwest of Meishan of Changxing County, Zhejiang. It was named by Ding Wenjiang in 1914
Lithology and Thickness
Sandstone. The Wutong Fm at the Longtan section is 136 m thick, and can be divided into two members. Lower part, the Guanshan Member, is composed of gray quartzite and quartz sandstone intercalated with purple shale. Upper part, the Leigutai Member, is characterized by grayish-white, grayish-black and grayish-brown quartz sandstone, siltstone and shale, intercalated with ferruginous and manganese nodules
Relationships and Distribution
Lower contact
The formation has a disconformable contact with the underlying Fentou Fm of Lower Silurian.
Upper contact
The formation has disconformable contact with the overlying Jinling Fm of Lower Carboniferous.
Regional extent
GeoJSON
Fossils
The Upper part, the Leigutai Member, yields fish fossils Sinolepis macrocephala, S. wutungensis, Asterolepis sinensis; plant fossils Sublrpidodendron mirabile, Lepidodendropsis hirmeri, Leptophloeum rhombicum, etc.
Age
Depositional setting
It is interpreted as a littoral delta.
Additional Information