Daryalyk Formation

Daryalyk Fm

Period:

Paleogene, Neogene

Age Interval:

Lower Oligocene-Lower Miocene, U2

Province:
Ustyurt-Sultanuzdag

Type Locality and Naming

Along the old channel of the Amu Darya River - Daryalyk, South Turkmenistan. G.F. Panteleev, N.G. Popov, 196

Synonym: Daryalyksaya Suite, Дарьяльская св.

Lithology and Thickness

Gray silty (aleuritic) clays, sandy. Thickness up to 230 m.

Lithology Pattern:

Sandy_claystone

Relationships and Distribution

Lower contact

Conformably overlies the Daudan Fm

Upper contact

Conformably overlain by the Turtkul Fm of the Lower Miocene.

Regional extent

Lower reaches of the Amu Darya River (Turtkul-Khivinsky district). Correlated with the upper part of the Lower Kungarad sub-suite and the Upper Kungarad sub-suite.

GeoJSON

null

Fossils

Contains a complex of foraminifera zones: 1) Spiropletammina carinata; 2) S. terekensis; 3) Prosononion dendriticus; marine bivalve mollusks - Nucula compta Goldf., Glossus ustjurtensis Iljina, Thyasira obtusa Veug. and others.

Age

The lower zone belongs to the Lower Oligocene (in Strat. vol. (444) - to the Lower Middle Oligocene), the middle - to the Upper Oligocene, the upper - to the Lower Miocene.

Age Span:

Beginning stage:

Rupelian

Fraction up in beginning stage:

0.5

Beginning date (Ma):

30.60

Ending stage:

Aquitanian

Fraction up in the ending stage:

1.0

Ending date (Ma):

20.45

Depositional setting

Depositional pattern:

Additional Information

Compiler:

A.A. Abdusamatov – In: GeoGPT translation of: “Abduazimova, Z.M. (Ed.), 2001. Stratigraphic Dictionary of Uzbekistan. IMR (Institute of Mineral Resources), Tashkent, 580 pp. (In Russian)”