Diymalek Fm
Period:
Proterozoic
Age Interval:
Lower Proterozoic, B1a
Province:
Bukhara-SW Gissar
Type Locality and Naming
Along the Diyemalek River, Baysuntau Range. V.A. Khokhlov et al. in 1963, later V.E. Golovin, 1973 (174), divided it into Khodzhabuzbak Fm, Aylangar Fm, and Shatut Fm of Proterozoic age, 1977 (307, p.55-56).
Synonym: Diymalek Suite, Диймалекская св.
Lithology and Thickness
Composed of orthoamphibolites, alternating with horizons and packets of aluminous gneisses. Thickness 800-1000 m.
Lithology Pattern:
Metavolcanics
Relationships and Distribution
Lower contact
Along the bedding, it lies on the Palgar Fm
Upper contact
It is overlain with angular unconformity by the Aylangar Fm.
Regional extent
Baysuntau Range (interfluve of the Diyemalek-Aylanjar). According to A.V. Pokrovsky, it is preserved in the form of small tectonic blocks and outliers.
GeoJSON
null
Fossils
Age
A.V. Pokrovsky (349) considers it a single unit and conditionally refers it to the Riphean. The stratigraphic name lost its significance due to its division into the three above-mentioned suites (442).
Age Span:
Beginning stage:
Tonian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
1,000.00
Ending stage:
Tonian
Fraction up in the ending stage:
0.15
Ending date (Ma):
958.00
Depositional setting
Depositional pattern:
Additional Information
Compiler:
Z.M. Abdurazimova – In: GeoGPT translation of: “Abduazimova, Z.M. (Ed.), 2001. Stratigraphic Dictionary of Uzbekistan. IMR (Institute of Mineral Resources), Tashkent, 580 pp. (In Russian)”