Shizikou Fm
Type Locality and Naming
The naming section is located in the area from Shizikou Village to Tianxinli, Qinglong Township, more than 10 km northeast of Dayu County, southern Jiangxi. Named by Tong Yongsheng et al. in 1976.
Lithology and Thickness
Mainly brick-red and purplish red pebbly sandstone and sandy mudstone with mudstone and grayish green sandstone dominantly of fluvial facies. Generally the lithology of lower part of this formation becomes coarse, usually intercalated with sandy conglomerate, and laterally the lithology is not persistent. Generally speaking, the lithology is coarser on the western margin of the basin, and eastward the lithology becomes finer, being mudstone with sandstone. The thickness is up to 128 m.
Relationships and Distribution
Lower contact
The formation has a disconformable contact with the underlying Late Cretaceous Nanxiong Fm (which is in adjacent Guangdong province). However, in southernmost Jiangxi, the next older regional unit is the early-Late Cretaceous Zhutian Fm of the Ganzhou Gr (Cret column 39b)
Upper contact
Conformable contact with the overlying Paleocene Chijiang Fm.
Regional extent
It is mainly distributed at Huyanshan and Shizikou of Qinglong Township and Chijiang and Xincunli of Chijiang Township, Dayu County, southern Jiangxi.
GeoJSON
Fossils
The fossil types found in the formation up to now are monotonous, but the individuals are rich; the fossils are buried sporadically. Mammals are restricted to Bemalambda shizikouensis and Pantolambdodon of Bemalambdids of Pantodonta.
Age
Depositional setting
The formation belongs to fluvial facies.
Additional Information