Dingzonglong Fm
Type Locality and Naming
The type section is located at Dingzonglong of Markam County, Xizang. It was named by No 3 Team of Regional Geological Survey of Sichuan Geological Bureau and was published by Sichuan Compiling Group for Regional Stratigraphical Scale (1978).
Lithology and Thickness
Dolomite and Marl. It is dominated by a set of carbonate rocks. Lower part consists of gray massive dolomite. Middle part consists of yellow shale intercalated with nodular limestone. Upper part is composed of gray thin-bedded marl intercalated with yellow shale. It is 169 m in thickness.
Relationships and Distribution
Lower contact
The Formation lies conformably on the sandy slate of the Haitong Fm.
Upper contact
Depending on region, the Formation lies below the Zuogadong Fm (gray thin-bedded dolomitic-limestone marl and grayish yellow banded shale; column 32; mid-border to Sichuan), Ranwu Gr (dolomite, column 26; which is just west of column 32) or Dongla Gr (volcanics, column 31; north-end of border to Sichuan)
Regional extent
The formation is distributed in Markam County, Xizang and the west part of Derong County, Sichuan.
GeoJSON
Fossils
It contains abundant brachiopods, bivalve, gastropods, stromatopora and corals; and the representative element is brachiopod Stringocephalus.
Age
Depositional setting
Additional Information