Santai Fm
Type Locality and Naming
It was named by Solgar as the “Santai System” in his early years. The naming section is located in the area extending from the Yuwang Mts to the Santai Mts of the Kunlun Town, Zibuo City, Shandong Province.
Synonym: （三台组）; Liu et al. (2019, The Cretaceous of Shandong Province, Open Jour. Geol., 9: 646-649, https://doi.org/ 10.4236/ojg.2019.910064) indicate "The Mengyin Group consists of the lower Santai Fm and the upper Fenshuiling Fm."
Lithology and Thickness
Lower member is composed of conglomerate, sandy conglomerate and purple feldspar-sandstone, intercalated with grey-green sandstone, with a thickness of about 460 m. Upper member is of conglomerate, sandy conglomerate, feldspar-sandstone and calcareous sandstone, with no top part having been found, with a thickness of about 600 m, and no biotic fossils have been found. The total thickness of the strata may reach over 1000 m.
Relationships and Distribution
Lower contact
Its basal part is in a disconformable or an unconformable contact with the underlying Fangzi Fm
Upper contact
Regionally, the schematic strat column for western Shandong (or Mengyin Basin) indicates the next younger unit is the Fenshuiling Fm (upper unit of the Mengyin Gr).
Regional extent
The generally recognized Santai Formation is distributed in the area extending from Zibo City to the Zhangqiu region. In the Fangzi area of Weifang City there are also found to occur the strata of the formation above the Fangzi Fm. Only within the territory of Weifang City the formation can distinctly be divided into two members, with only the lower member being found to occur in the vicinity of the Santai Mts, and with a fairly good development of the upper member in the area extending from the Jinshan Mts to the Hulu Mts of Zibuo City.
GeoJSON
Fossils
Age
Depositional setting
The formation belongs to fluvial and eolian deposits.
Additional Information