Tashakyr Formation

Tashakyr Fm

Period:

Quaternary

Age Interval:

Eopleistocene (?), K1-K9

Province:
Kyzylkum Region

Type Locality and Naming

Along the Tashakyrsky level, middle course of the Amu Darya River, Turkmenistan. A.I.Aynemer, V.V. Zhitinova, N.M.Raduyevich et al., 1967 (41, p. 100-101). Typical sections in the middle course of the Amu Darya River.

Synonym: Tashakyrskaya Suite, Ташакырская св.

Lithology and Thickness

Sands and sandstones with lenses of coarse clastic rocks and layers of whitish marls, calcareous clays, and siltstone (aleurolites). Thickness up to 18 m.

Lithology Pattern:

Sandstone

Relationships and Distribution

Lower contact

Lies with erosion on the Sadyvar Fm and older deposits up to the Upper Cretaceous inclusive

Upper contact

overlain by younger Quaternary deposits

Regional extent

Southwestern Kyzylkum and Northeastern Karakum, Zirabulak-Ziaetdin district.

GeoJSON

null

Fossils

Contains ostracods - Cyprideis littoralis Brady., Ilyocypris Gibba Ramd., Darwinula stevensoni Brady.

Age

A.A. attributes the Tashakyr Fm. to the Upper Pliocene. A.A. attributes the Tashakyr Fm. to the Upper Pliocene. Along the position on the lacustrine-marine Apshearon deposits of the Sadayvar Fm conditionally attributed to the Eopleistocene (346,444).

Age Span:

Beginning stage:

Chibanian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

0.77

Ending stage:

Chibanian

Fraction up in the ending stage:

1.0

Ending date (Ma):

0.13

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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