Laohutou Fm
Type Locality and Naming
The type section is located at Laohutou, north of the Lechang county seat, Guangdong Province.
It was named by Xu Ruilin in 1937.
Lithology and Thickness
Sandstone. It is dominated by grayish-white to grayish-green medium- to coarse-grained quartzose sandstone. Upwards, the clayey, silty and calcareous components gradually increase and interbeds of sandstone with shale in yellow and red colors appear.
It is about 340 m thick.
Relationships and Distribution
Lower contact
It conformably contacts the underlying Yangxi Fm.
Upper contact
The contact relation with the overlying Huanggangliang Fm of the Middle Devonian is unclear.
Regional extent
This formation is mainly distributed in Lechang and Shaoguan of northern Guangdong.
GeoJSON
Fossils
It mainly yields fish fossils Bothriolepis sinensis, B. kwangtungensis, B. lochangensis, B. shaokuanensis, and plant fossils Lepidodendropsis cf. tiaomaensis, Protopteridium minutum, Protolepidodendrom scharyanum.
Age
Depositional setting
Additional Information
The formation is late Middle Devonian in age and can be correlated with the Tiaomajian Fm of central Hunan.