Getun Fm
Type Locality and Naming
The type section of the Getun Formation is the same section as Dalinzi Formation. The section is located along the Dalinzi-Getun sea-beach, Manjiatan Village, southern Liaotung Province (122°04’00” E, 39°04’21” N), and was remeasured by Hong Zuoming et al. from Liaoning Regional Geological Survey Team in 1991. In the type section, the formation is 38.20 m thick. The Getun Formation was named by Zhang (1977). The name is derived from Getun Village, Manjiatan Township, Jinzhou District, Dalian City, southern Laotung Peninsula, southern Liaoning Province.
Synonym: （葛屯组）
Lithology and Thickness
The Getun Formation is a clastic sequence, consisting of grey shale, sulty shale, and siltstone, and medium- to thick-bedded, shandstone, with greyish white, thin-bedded medium- to coarse-grained quartzose sandstone bearing small quartzose pebbles at the base.
Relationships and Distribution
Lower contact
The Getun Fm is in disconformable contact with the underlying Xingingcun Fm of Ediacaran System.
Upper contact
The Getun Fm is in disconformable contact with the overlying Dalinzi Fm.
Regional extent
The Getun Formation is exposed in the Liaoning-Jilin Area of North China Region, distributed in the Jinzhou District of Dalian City, southern Liaotung Peninsula, southern Liaoning. It has maximum thickness of 64.9 m at Getun sea-beach, decreasing northwestward to 38.2 m at Manjiatan sea-beach.
GeoJSON
Fossils
Unidentified bradoriids are reported from the greyish black shale near the base of the formation in the type section and Yang (in Yang and Li, 1997) reported small shelly fossils Sabellidites cambriensis and Chuaria circularis etc. in the upper purple silty shale at Manjiatan and Longwangmiao, Jinzhou District, Dalian City.
Age
Depositional setting
The formation represents littoral beach setting.
Additional Information