Toytyubin Formation

Toytyubin Fm

Period:

Quaternary

Age Interval:

Eopleistocene, CK12

Province:
Chatkal-Kuramin Region

Type Locality and Naming

Near the city of Toytyube, Tashkent region. Ya.M. Khayfets et al., 1970.

Synonym: Toytyubinskaya Suite, Toityubin suite, Тойтобинская св.

Lithology and Thickness

It is confined to the upper part of the brown-colored molasse section in the Pre-Tashkent depression. Conglomerates, gravelites, sandstones, siltstone (aleurolites) light and brownish-brown, brownish-gray. Coarse-clastic and sandy rocks represent the ancient buried alluvium of the Chirchik and Angren rivers, and in their paleovalleys they form the main part of the section. Thickness up to 300 m.

Lithology Pattern:

Aus Conglomerate

Relationships and Distribution

Lower contact

It lies conformably on the Pskent Fm

Upper contact

is conformably overlain by the Tyuyabuguz Fm

Regional extent

In the area of the city of Toytyube, Tashkent region, in boreholes. It is correlated with the lower part of the Kandyrsay Fm by L.D. Anpleyeva (Koloyarov et al., 1977).

GeoJSON

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Fossils

Contains ostracods - Candona ex gr, faba Suzin., Candoniella albicans (Brady.), C. sp., Ilyocypris Gibba (Ramdohr.), Stenocypris sp., Lineocypris sp., Subulacypris sp., Dolerocypris sp

Age

According to A., the age is Upper Pliocene. In connection with the transfer of the Apsheron to the Eopleistocene, the suite belongs to the lower part of the Eopleistocene.

Age Span:

Beginning stage:

Piacenzian

Fraction up in beginning stage:

0.5

Beginning date (Ma):

3.09

Ending stage:

Piacenzian

Fraction up in the ending stage:

0.7

Ending date (Ma):

2.89

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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