Dongka Fm
Type Locality and Naming
It was proposed by Liang Shousheng and Xia Jinbao in 1978. The type section is located at about 6 km northeast of Dongqiao Co Lake, approximately 40km southwest of Dongqiao, Bangoin County, Xizang.
Synonym: (东卡组)
Lithology and Thickness
The formation, 442 m in thickness, consists of interbeds of dark grey crystalline limestone with light grey dolomitic crystalline limestone.
Relationships and Distribution
Lower contact
The underlying formation is still unknown.
Upper contact
It is in conformable contact with the overlying yet-unnamed formation, which is probably belonging to Wenlock or even higher.
Regional extent
t is exposed only in the type section area.
GeoJSON
Fossils
The fossils, such as the corals Palaeofavosites felix, P. cf. surikuensis, P. cf. legibilis, Catenipora aff. gothlandicus, Solenihalysites norvegicus, Propora aff. conferta; and the cephalopods Harrisonoceras cf. revesi, Allanoceras xizangensis, ?Edenoceras sp. are abundant in the limestone.
Age
Depositional setting
Additional Information