Akchadarin Formation

Akchadarin Fm

Period:

Quaternary

Age Interval:

Holocene, U2

Province:
Ustyurt-Sultanuzdag

Type Locality and Naming

Along the Akchadarya River, South Pre-Aral. N.A. Kogai, 1959 (382, p.128).

Synonym: Akchadarya Complex, Акчадаринский компл.

Lithology and Thickness

Lacustrine-alluvial sands, siltstone (aleurolites), silts, loams, clays with lenses of sand (thickness up to 10 m) and channel gray sands of the old riverbed of the Akchadarya (thickness up to 5m).

Lithology Pattern:

Fine-grained sandstone

Relationships and Distribution

Lower contact

Lies on lacustrine-alluvial deposits of the upper-modern undivided link.

Upper contact

Regional extent

South Pre-Aral, surface of the Akchadarya lacustrine-alluvial deltaic plain and channel deposits of the Akchadarya River itself. Used in the stratigraphic scheme of Quaternary deposits of Uzbekistan (A.I. Kim et al., 2000). Correlated with the Aral Gr and Amudarya Gr of the South Pre-Aral.

GeoJSON

null

Fossils

Remains of large mammals - Capreolus capreolus pygargus Pall.; rodents - Paradipus etenodactylus Vinog., Rhambomys apimus Licht., Seirtopoda telum Licht., ostracods Limnocythere inopinata (Baird.), L. pomosa Mand., Cyclocypris laevis Müll. - inhabitants of modern freshwater bodies, mollusks - Limnacus (Radix) ovata Drap., Planorbis (Gyraulus) laevis Alder., Corbicula fluminalis Müll., as well as archaeological finds of Neolithic and early and late ancient settlements.

Age

Dates the deposits of the complex as Holocene. According to A. and (444), it belonged to the Upper Quaternary deposits.

Age Span:

Beginning stage:

Holocene

Fraction up in beginning stage:

0.0

Beginning date (Ma):

0.01

Ending stage:

Holocene

Fraction up in the ending stage:

1.0

Ending date (Ma):

0.00

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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