Ishikdarin Fm
Period:
Silurian, Devonian
Age Interval:
Upper Silurian - Lower Devonian (?), N5
Province:
Nuratau
Type Locality and Naming
Along the Ishikdarya River, Malguzar Mountains. R.R. Usmanov et al. in 1991 (1999); (460, p.96).
Synonym: Ishikdarinskaya Suite, Ишикдаринская св.
Lithology and Thickness
Slates, siltstone (aleurolites), sandstones with lenses of marbled limestones. Thickness more than 200m.
Lithology Pattern:
Sandy_claystone
Relationships and Distribution
Lower contact
The lower boundary is unknown
Upper contact
The upper boundary is normally stratigraphic with overlying middle Devonian-lower Carboniferous limestones.
Regional extent
Central part of the Malguzar Mountains.
GeoJSON
null
Fossils
Age
Upper Silurian-Lower Devonian (conditionally) age is established by stratigraphic position.
Age Span:
Beginning stage:
Ludfordian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
425.01
Ending stage:
Emsian
Fraction up in the ending stage:
1.0
Ending date (Ma):
394.30
Depositional setting
Depositional pattern:
Additional Information
Compiler:
V.V. Mikhailov – In: GeoGPT translation of: “Abduazimova, Z.M. (Ed.), 2001. Stratigraphic Dictionary of Uzbekistan. IMR (Institute of Mineral Resources), Tashkent, 580 pp. (In Russian)”