Tyuyabuguz Formation

Tyuyabuguz Fm

Period:

Quaternary

Age Interval:

Upper Pliocene-Eopleistocene, CK12

Province:
Chatkal-Kuramin Region

Type Locality and Naming

In the Tyuya-Buguz Reservoir, Tashkent Region. Ya.M. Khayfets et al., 1970.

Synonym:

Lithology and Thickness

The section is dominated by brownish and pale siltstone (aleurolites) and clays, with layers of sandstones, gravelites, and conglomerates. In the paleovalleys of the Chirchik and Angren rivers, conglomerates and gravel-sandy alluvium predominate. Thickness: up to 340m.

Lithology Pattern:

Aus Conglomerate

Relationships and Distribution

Lower contact

It lies conformably on the Toytyubin Fm

Upper contact

It is unconformably overlain by Neopleistocene deposits

Regional extent

Along boreholes, in the Tyuya-Buguz Reservoir area, Tashkent Region, it caps the section of brown-colored molasses of the Upper Pliocene-Eopleistocene Upper TienShan Gr. It is correlated with the Kandyrkay Fm

GeoJSON

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Fossils

Upper Pliocene-Eopleistocene ostracods have been found - Lineocypris namanganica Schn., Schneiderella sp., Acutocypris sp., Candone compressaformis Hand., C. apscheronica Schn., Advenocypris aff. gracilis Schn., A. ex gr. decyrta Schn., Subulacypris sp., Herpetocypris sp., Darwinula sp., Lineocypris minuta Schn., Ilyocypris bradyi Sars., I. Gibba (Ramdohr.), Candona rostrata Brady. et Norman., Eucypris ex gr. longa Hand.

Age

According to A., the age of the suite is Pliocene. But the fossil data indicates Upper Pliocene-Eopleistocene; hence considered the same for Lexicon.

Age Span:

Beginning stage:

Piacenzian

Fraction up in beginning stage:

0.7

Beginning date (Ma):

2.89

Ending stage:

Gelasian

Fraction up in the ending stage:

1.0

Ending date (Ma):

1.80

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)”