Laojingzhai Fm
Type Locality and Naming
The type section is located at Laojingzhai of Mengla in Jinping County, Yunnan Province, and the reference section is at Maludong of Jinping County. It was named by he Second branch Team of yunnan No 2 Team of Regional Geological Survey in 1972, and was published by Yunnan Compiling Group for Regional Stratigraphical Scale in 1978.
Lithology and Thickness
Limestone. It is composed of gray to dark-gray bioclastic limestone and clayey banded limestone.
It is 120 m thick-
Relationships and Distribution
Lower contact
It has a basal conformable contact to the black shale and thin-bedded chert of the Songjiazhai Fm.
Upper contact
It is overlain by light-gray medium-bedded to massive limestone of the Upper Devonian.
Regional extent
It is distributed in Maludong, Songjiazhai, Luogetang and Yilihe of Jinping County, Yunnan Province.
GeoJSON
Fossils
It yields corals Grypophyllum, Keriophyllum, Cyathophyllum.
Age
Depositional setting
Additional Information
The first and second beds of the section described in “the Regional Stratigraphic Scale of southwest China; Yunnan facsimile” (1978) should be equivalent to the Songjiazhai Fm.