Alay Gr
Period:
Devonian, Carboniferous
Age Interval:
Middle Devonian–Lower Carboniferous (Givetian-Visean), F10b
Province:
Fergana
Type Locality and Naming
Along the Alay ridge. G.S. Porshnyakov in 1964 (354, p.39). Previously described by N.M. Sinitsyn in sections of carbonate "sedimentary troughs." M. more than 2000m (165; 443).
Synonym: Alay Series, Алайская сер., Alai Series
Lithology and Thickness
Combines the Arpalyk, Boordin, Adyrakou, Nazarin, and Karadavan formations.
Lithology Pattern:
Limestone
Relationships and Distribution
Lower contact
Schematic stratigraphic column indicates the next formation as Karadavan Fm
Upper contact
It lies in a continuous section or transgressively on the Peshkaut Fm
Regional extent
North foothills of the Alay ridge.
GeoJSON
null
Fossils
Age
Middle Devonian–Lower Carboniferous (Eifelian-Visean)
Age Span:
Beginning stage:
Givetian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
385.30
Ending stage:
Visean
Fraction up in the ending stage:
0.2
Ending date (Ma):
343.45
Depositional setting
Depositional pattern:
Additional Information
Compiler:
B.B. Muxaŭlov – In: GeoGPT translation of: ”Abduazimova, Z.M. (Ed.), 2001. Stratigraphic Dictionary of Uzbekistan. IMR (Institute of Mineral Resources), Tashkent, 580 pp. (In Russian)"