Longjiang Fm
Type Locality and Naming
The type section lies at Maichapai of the Longjiang River, Longmen County, Guangdong. It was named by the compiling group for Regional Geology of Guangdong Province in 1988.
Lithology and Thickness
Sandstone to Claystone. Light-gray, light yellow and purple-red sandstone, siltstone and shale, intercalated with calcareous shale and siltstone, and containing minor fine-grained gravel in the basal sandstone. It is 96−553 m thick, but varying greatly from place to place: about 500 m around Longmen, 150 m along Huiyang and Bao’an, and 290 m around Huaxian County.
Relationships and Distribution
Lower contact
Conformable contact with the underlying Devonian Dawushi Fm
Upper contact
Conformable contact with the overlying Doulingao Fm (Douling'ao Fm)
Regional extent
GeoJSON
Fossils
Brachiopods Leptagonia, Cleiothyridina, Buxtonia, Fusella, Martiniella and Spirifer; Trilobite Phillipsia, etc.
Age
Depositional setting
It is interpreted as littoral and littoral-limnetic facies of fine-grained clastics
Additional Information