Dzheyrantuy Formation

Dzheyrantuy Fm

Period:

Cretaceous

Age Interval:

Lower-middle Turonian, K1-K5, K7, K9

Province:
Kyzylkum Region

Type Locality and Naming

Along the Dzheyran-Tuy River, Central Kyzylkum. I.M. Abdazimova, 1988 (24, pp.64-69), used the name proposed by E.M. Shmarovich et al. (322,446) for the Dzheyran-Tuy Mountains. Stratotype in the south-western foothills of Altyntau.

Synonym: Dzheirantuyskaya Suite, Djeirantuy, Джейрантуйская св.

Lithology and Thickness

Marine greenish and dark gray clays, siltstone (aleurolites), with layers of sandstones, limestones, and conglomerates. Thickness 10-110m.

Lithology Pattern:

Sandy_claystone

Relationships and Distribution

Lower contact

Lies with erosion on the Uchkuduk-Cret Fm or transgressively on the Paleozoic

Upper contact

It is overlain with erosion by the Kendyktyube Fm

Regional extent

Central Kyzylkum, foothills of Kuldyktau, Auminzatau, Bukantau, Tamdytau, Altyntau, Nurata Mountains, in the plains exposed by well. Correlated with the Talhab Fm of South-Western Gissar.

GeoJSON

null

Fossils

Contains ammonites - Proplacenticeras ex gr. khoresmense (Lah.); marine bivalve mollusks - Leda futtereri Byehm., Inoceramus labiatus Schloth., Corbula muschketovi Вцehm.; foraminifera - Reophax kysylcumensis Suleim., Haplophragmoides turonicus Zhuk., Gaudryinopsis akrabatensis (Zhuk.), Raragaudryina inornata media Suleim.; spores and pollen.

Age

Belongs to the lower and lower part of the middle Turonian; in the Strat. sl. (446) - to the lower Turonian.

Age Span:

Beginning stage:

Turonian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

93.90

Ending stage:

Turonian

Fraction up in the ending stage:

0.25

Ending date (Ma):

92.77

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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