Dzhalgyztau Fm
Period:
Devonian
Age Interval:
Middle Devonian, K7
Province:
Kyzylkum Region
Type Locality and Naming
Dzhalgyztau Mountains, Central Kyzylkum. A.V. Tolokonnikov et al., 1984.
Synonym: Dzhalgyztau Suite, Джалгызтауская св.
Lithology and Thickness
Divided into two sub-suites: lower - coarse and thin-bedded dolomites with thin-micro-bedded clayey-calcareous dolomites. Thickness 324-340m; upper - clayey varieties of carbonate rocks: clayey dolomites, dolomitic-clayey limestones. Thickness 800m.
Lithology Pattern:
Dolomitic limestone
Relationships and Distribution
Lower contact
Conformably overlies the dolomites of the Dzhengeldin Fm
Upper contact
Upper boundary unknown.
Regional extent
Central Kyzylkum, Beltau Mountains.
GeoJSON
null
Fossils
Stromatoporoids - Amphipora sp., Clathrodictyella sp. (ex gr. pulchra Bogojav.), Dendrostroma">Dendrostroma sp., Stachyodes ex gr. gracilis kuznetskensis Yavor,, Stachyodes sp.
Age
Middle Devonian age is established by stromatoporoids.
Age Span:
Beginning stage:
Eifelian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
394.30
Ending stage:
Givetian
Fraction up in the ending stage:
1.0
Ending date (Ma):
378.90
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Z. M. Abduazimova – In: GeoGPT translation of: “Abduazimova, Z.M. (Ed.), 2001. Stratigraphic Dictionary of Uzbekistan. IMR (Institute of Mineral Resources), Tashkent, 580 pp. (In Russian)”