Kazaksuy Formation

Kazaksuy Fm

Period:

Ordovician

Age Interval:

Middle-Upper Ordovician, K9a, K7

Province:
Kyzylkum Region

Type Locality and Naming

Along the city of Kazakas, Kuldzhuktau Mountains, Central Kyzylkum. Ya.B. Aysanov in 1965, 1968 (43, pp. 61-62).

Synonym: Kazakasuyskaya Suite, Казаксуйская св.

Lithology and Thickness

Siliceous-chlorite-sericite, micaceous-quartz, clayey slates, and sandstones containing layers and lenses of gravelites, conglomerates, thin-bedded siltstone (aleurolites), siliceous rocks, and volcanites (porphyroids, andesite-dacites, rhyolites, tuffs of trachyriolites) of dark and light gray, pinkish-gray, lilac-gray, and green colors. Thickness 400-500m.

Lithology Pattern:

Sandy_claystone

Relationships and Distribution

Lower contact

According to A., the lower boundary is not established

Upper contact

The upper boundary is conformable with the Oydybulak Fm (42; 43, 44; 165; 460).

Regional extent

Central Kyzylkum, northern slope of the Kuldzhuktau and Beltau Mountains; in the form of narrow strips in the southeastern part of Bashguzumdy and the northern part of Yangikazgan, as well as under the cover of Mesozoic-Cenozoic formations in the intermountain area of Kuldzhuktau and Auminzatau; in the southern part of Kuldzhuktau in the submerged part of the basement. It is correlated with the Altayaul Fm of the Zirabulak Mountains (44); the upper part - with the Shuruk-Ord suite of Kuldzhuktau.

GeoJSON

null

Fossils

Numerous organic remains: trilobites - Basilicus cf. nobilis Barr., Calliops cf. hancharensis Sem., Illaenus cf. talasicus Weber, etc., brachiopods Niolella ex gr. actomae (Sow.), Austinella sp., etc.; corals - Lyopora cf. regularis Kim., etc.

Age

The Middle-Late Ordovician age is established by numerous organic remains

Age Span:

Beginning stage:

Dapingian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

471.26

Ending stage:

Katian

Fraction up in the ending stage:

0.5

Ending date (Ma):

448.98

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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