Zhaixia Fm
Type Locality and Naming
Eastern Fujian. The Zaixia Formation was erected by Li Jianhai (1994) in the Zaixia Village about 15 km south of the Yongtai County of Fujian. The type section is along the simple highway between Zaixia – Bingwanwei (118º58', 25º43') south of the Yongtai County of Fujian.
Synonym: Zhaixia Fm
Lithology and Thickness
The Zaixia Formation is represented by a set of purple red sedimentary-volcanic eruptive rock series, which is roughly divided into two members. Lower member is built up by purple red tuffaceous sandy conglomerate, siltstone and mudstone, occasionally with dacite, which lies disconformably on the underlying Huangkeng Formation. Upper member is built up by purple gray and gray green rhyolite, rhyolitic tuff lava, potash feldspar rhyolite, quartz trachyte, occasionally with tuffaceous siltstone and occasionally with basalt seen at the base. The Zhaixia Formation is 1072.4 m thick.
Relationships and Distribution
Lower contact
It contacts disconformably on the underlying Huangkeng Fm.
Upper contact
It is overlain disconformably by tuffaceous sandstone of the Shiniushan Fm.
Regional extent
The present formation is distributed in east Fujian and is completely developed in Yunshan of Yongtai-Wuhushan of Fuzhou, Lingtongshan of Pinghe, Zhenghe-Luoyuan. It is basically the same in lithology in the various basins and ranges from 440.9 to 1367.7 m in thickness.
GeoJSON
Fossils
Its lower member yields floras Manica parceramosa, Brachyphyllum obesum, Cupressimocladus gracilis, Pagiophyllum sp.; estherias Yanjiestheria sp., Orthestheria sp.
Age
Depositional setting
Additional Information