Kyzylatin Formation

Kyzylatin Fm

Period:

Cretaceous

Age Interval:

Upper Aptian - Upper Albian, CK2, CK5a, CK8, CK9

Province:
Chatkal-Kuramin Region

Type Locality and Naming

Along the Kyzyltal and Kyzylata rivers, Pre-Tashkent Chul. G.A. Belenky, 1966 (96, pp.99-100). Stratotype in the headwaters of the Kelif River, on the right bank of the Kyzylata River, in the foothills of the Karzhantau range.

Synonym: Kyzylatinskaya Formation, Кызылатинская св.

Lithology and Thickness

Consists of two formations: variegated and pink. Lower formation - variegated, spotted, bluish-green, reddish-brown sandstones and siltstone (aleurolites); upper formation - pink sandstones and siltstone (aleurolites). Thickness 14-350m.

Lithology Pattern:

Siltstone

Relationships and Distribution

Lower contact

Lies unconformably on the Azatbash Fm or transgressively on the Paleozoic

Upper contact

It is overlain with erosion by the Akdachin Fm.

Regional extent

Pre-Tashkent Chul, foothills of the Chatkal and Karzhantau ranges, in the Tashkent depression, revealed by drilling. Along A., - to the Albian and is correlated with the Kyzylpilyal Fm of South Ferghana. Along O.A. Fedorenko et al. (478), corresponds to the Kekpenkaldyk Fm of the North Kyzylkum

GeoJSON

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Fossils

Contains ostracods - Cypridea inornata Peck., Timiriasevia costata Gal., T. simakovi Mand., charophyte algae - Atopachara trivolvis Peck.

Age

Belongs to the upper Aptian - lower Albian; Along A., - to the Albian. Along O.A. Fedorenko et al. (478), has a Hauterivian age, in (452) - Barremian-Albian

Age Span:

Beginning stage:

Aptian

Fraction up in beginning stage:

0.8

Beginning date (Ma):

114.84

Ending stage:

Albian

Fraction up in the ending stage:

0.8

Ending date (Ma):

103.04

Depositional setting

Depositional pattern:

Additional Information

Compiler:

I.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)”