Atynkol Formation

Atynkol Fm

Period:

Quaternary

Age Interval:

old sense => begin with modern Calabrian, U1

Province:
Ustyurt-Sultanuzdag

Type Locality and Naming

Along the Atynykol lake in the sands of Tashkuduk, South Aral region. B.I. Pinhasov, 1984 (346, pp.57-58).

Synonym: Atynykol Suite, Атынькольская св.

Lithology and Thickness

Lake-alluvial yellowish-gray feldspar-quartz fine-grained sands, loess and brown clays and siltstone (aleurolites). On the dried bottom of the Aral, in the section of the suite, lake-marine greenish-gray, clay-aleurolite rocks begin to dominate. Thickness 10-40m.

Lithology Pattern:

Clayey sandstone

Relationships and Distribution

Lower contact

Lies with erosion on the Zair Fm and all older deposits, up to the Cretaceous.

Upper contact

Schematic stratigraphic column indicates the upper contact is Aral Gr

Regional extent

South Aral region, dried bottom of the Aral Sea. In the age range, it corresponds to the Sadivar Fm and Tashakyr Fm.

GeoJSON

null

Fossils

Contains Apsheron mollusks - Corbicula fluminalis Mill. var. apsheronica Andrus., Melanoides apsheronica Andrus.; ostracods - Trachyleberis psevdoconvexa (Liv.), Cytherissa bogatschovi Liv., Leptocythere variabiletuberculata Schn., Limnocythere tenureticulata Suz., Candona neglecta Sars.

Age

Dated to the Eopleistocene (Apsheron). Quat (old sense) => Calabrian

Age Span:

Beginning stage:

Calabrian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

1.80

Ending stage:

Calabrian

Fraction up in the ending stage:

1.0

Ending date (Ma):

0.77

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)”