Nilkahe Fm
Type Locality and Naming
The Nilekehe Rock Series was proposed by the past Soviet 13th Party of Aerial Geological Survey during 1952-1953 and published by the Compiling Group of Regional Stratigraphical Scale of the Xinjiang Uygur Zizhiqu in 1981. No type section was indicated.
Synonym: (尼勒克河组) ; Nilekehe Fm
Lithology and Thickness
It is dominated by gray, grayish black thick-bedded to massive siltstone and carbonaceous pelitic shale. About 250 m in thickness
Relationships and Distribution
Lower contact
The lower and upper boundaries of the formation are unclear. Regionally, the next older unit is the Hudukedaban Fm of late Ordovician.
Upper contact
The lower and upper boundaries of the formation are unclear. Regionally, the next younger unit is the Jebki Fm of mid-Silurian.
Regional extent
The formation is, as so far known, exposed merely in the upper reaches of Nilka River in Nilka County in the central Tianshan Mts. area of Xinjiang.
GeoJSON
Fossils
It bears graptolites Streptograptus, Pristiograptus, Monograptus cf. sedgwickii, etc.
Age
Depositional setting
Additional Information