South Balpantau Fm
Period:
Silurian, Devonian
Age Interval:
Ludfordian- Pragian, K5a
Province:
Kyzylkum Region
Type Locality and Naming
Through the mountains of Balpantau, Tamdytau, Central Kyzylkum. A.K. Bukharin et al. in 1984 (122, p.76).
Synonym:
Lithology and Thickness
Dolomites, flaggy, sometimes conglomeratic, thick-bedded limestones, interbedded with crinoidal and sandy limestones, with a basal sandy-gravelly portion. Thickness 800m.
Lithology Pattern:
Dolomitic limestone
Relationships and Distribution
Lower contact
Stratigraphic contacts are not established. According to A.A., unconformably, with erosion, it lies on the Akkuduk Fm
Upper contact
Overlying deposits are absent.
Regional extent
Central Kyzylkum, NE Tamdytau, Balpantau Mountains, Sangruntau.
GeoJSON
null
Fossils
In limestones, brachiopods of Pragian age - Leptagonia rhomboidalis Wilek., Nikiforovaena linxoides Nal., Karpinskia conjugula Tschern., conodonts, Tentaculites, crinoids (Bukharin et al., 1984).
Age
Earlier, Yu.A. Likhachev et al. (266) attributed these deposits to the Elemesachin Fm of the Lower Devonian. Later, A.K. Bukharin et al. (1990) named this suite Zapadnobalpantauskaya (460). It belongs to the Pragian stage of the Lower Devonian.
Age Span:
Beginning stage:
Ludfordian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
425.01
Ending stage:
Pragian
Fraction up in the ending stage:
1.0
Ending date (Ma):
410.51
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Z.M. Abdazimova – In: GeoGPT translation of: “Abduazimova, Z.M. (Ed.), 2001. Stratigraphic Dictionary of Uzbekistan. IMR (Institute of Mineral Resources), Tashkent, 580 pp. (In Russian)”