West-Kyzkolysay Fm
Period:
Silurian
Age Interval:
Upper Llandovery, N4
Province:
Nuratau
Type Locality and Naming
Along the location of the western Kyzykolsay, N. Nuratau Ridge. E.V. Chukarov et al., 1966f.
Synonym: West Kyzkolysay Suite, Западнокызколысайская св.
Lithology and Thickness
Clayey-siliceous slates and argillites with layers of siltstone (aleurolites) and fine-grained sandstones. Thickness 10-50m.
Lithology Pattern:
Clayey sandstone
Relationships and Distribution
Lower contact
Stratigraphic contacts are unknown.
Upper contact
Stratigraphic contacts are unknown.
Regional extent
Northern Nuratau Ridge, Kyzkolsay basin, in the tectonic scales of the Mikhin-Daristan structure. It has limited distribution. (11; 165; 460).
GeoJSON
null
Fossils
The Late Llandovery age is established by graptolites - Streptograptus cf. exiguus (Nichol.), Plegmatograptus cf. obesus(Lapw.), Monograptus sp.
Age
Age Span:
Beginning stage:
Telychian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
438.59
Ending stage:
Sheinwoodian
Fraction up in the ending stage:
1.0
Ending date (Ma):
430.62
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Z.M. Abdouazimova – In: GeoGPT translation of: “Abduazimova, Z.M. (Ed.), 2001. Stratigraphic Dictionary of Uzbekistan. IMR (Institute of Mineral Resources), Tashkent, 580 pp. (In Russian)”