Tuzkoy Formation

Tuzkoy Fm

Period:

Cretaceous

Age Interval:

middle-upper (lower) Aptian, K7, K9

Province:
Kyzylkum Region

Type Locality and Naming

By the Tuzkoy uplift, Central Kyzylkum. I.M. Abdazimova, E.M. Shvets, 1987 (27, pp. 54-57).

Synonym: Tuzkoy Suite, Тузкойская св.

Lithology and Thickness

Marine and coastal-marine gray sandstones and conglomerates. Thickness 3-26 m

Lithology Pattern:

Coarse-grained sandstone

Relationships and Distribution

Lower contact

It lies with erosion on the Paleozoic

Upper contact

It is overlain transgressively by the Kalaatin Fm

Regional extent

Central Kyzylkum, foothills of Kuljuktau and Auminzatau. Stratotype on the southern slope of the Tuzkoy uplift, western end of the Kuljuktau mountains, 5 km west of the Kalaata settlement.

GeoJSON

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Fossils

Contains marine bivalve mollusks - Vnigriella angulatostriata albensis Nik., Liostrea leymerri Desh, Amphidonte arduennensis zeravschanica Muzaph., gastropods - Paraglauconia dimorpha Dzhal.; brachiopods - Eudesia tekedgikenica Smirn., Praelongithyris dutempleana (Orb.), Cyclothyris cf. polygona (Orb.).

Age

It belongs to the middle Aptian and lower upper Aptian (A. nolani zone).

Age Span:

Beginning stage:

Aptian

Fraction up in beginning stage:

0.3

Beginning date (Ma):

118.94

Ending stage:

Aptian

Fraction up in the ending stage:

0.6

Ending date (Ma):

116.48

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)”