Bazilbek Formation

Bazilbek Fm

Period:

Neogene

Age Interval:

Upper Pliocene, K1-K9

Province:
Kyzylkum Region

Type Locality and Naming

Along the Bazylbek village, Kyzylkum. M.N. Gramm, 1960 (178, p.63).

Synonym: Bazylbek Suite, Базильбекская св.

Lithology and Thickness

Continental brown and gray unevenly interbedded sandstones, siltstone (aleurolites), clays, with coarse clastic rocks in the foothills. Thickness 30-100m.

Lithology Pattern:

Sandstone

Relationships and Distribution

Lower contact

Lies unconformably on the Agitmin Fm and Paleogene

Upper contact

It is overlain by Quaternary deposits

Regional extent

South of the Central Kyzylkum, framing the Nurata Mountains. In the foothills of the Nurata Range and Nurata Depression, it corresponds to the upper Pliocene-Eopleistocene brown molasse formation of the Upper Tien Shan series. In the south of the Agitmin Depression in Yuz-Bale, on the Avtobachinsky Plateau, and the eastern part of the Rometan Depression, it is differentiated into the Tashakyr Fm, Sadyvar Fm, and Kassantau Fm.

GeoJSON

null

Fossils

Contains ostracods - Cyprideis littoralis (Br.), Candona angulata Miill., Limnocythere dissortis Mand., L. kuschkanensis Gr., Eucypris aff. concinna Schn., E. samgarensis Gr., Cyprinotus vialovs Schn., Iliocypris bradi Sars., Darwinula stevensoni (Br. et Rob.).

Age

According to A., the age of the suite is Apsheron, lower part - possibly Akchagyl. In the Strat. vol. (444) - Neogene.

Age Span:

Beginning stage:

Piacenzian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

3.60

Ending stage:

Piacenzian

Fraction up in the ending stage:

1.0

Ending date (Ma):

2.58

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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