Linjiatun Fm
Type Locality and Naming
The type section is located in the Jiguanshan Mt. of the Nenjiang County, Heilongjiang Province. It was named by the Compiling Group on the Regional Stratigraphic Chart of Heilongjiang Province in 1979.
Lithology and Thickness
Clastics. Lower part is composed of dark-grey and yellow-green siltstone and slate, with its base consisting of a layer of conglomerate, with a thickness of 842 m. Middle part is composed of interbeds of grey-white and yellow-green sandstone and pebble-bearing sandstone, with a thickness of 177 m. Upper part is composed of grey-black and yellow-green clayey slate, siltstone, phyllite and greywacke, with a thickness of over 900 m. Total thickness is over 1900 m.
Relationships and Distribution
Lower contact
Upper contact
Uncertain; the upper boundary is also unclear.
Regional extent
Distributed in the Taxi area of the Nenjiang County and to the South of Handaqi, Daguchuan and Sanzhan areas of the Aihui County. Coeval (uncertain?) with Bazhan Fm of similar facies in same region.
GeoJSON
Fossils
The slate in the lower part of the formation yields bivalves represented by Palaeomutela triangularis, P. lunulata, Microdentella and Prilukiella.
Age
Depositional setting
Lower part is interpreted as coastal lake-facies deposits.
Additional Information