Pskent Formation

Pskent Fm

Period:

Neogene

Age Interval:

Upper Pliocene, CK12

Province:
Chatkal-Kuramin Region

Type Locality and Naming

By the village of Pskent, Tashkent region. Ya.M. Khayfets et al., 1970.

Synonym: Pskent Suite, Пскентская св.

Lithology and Thickness

Forms the lower part of the brown-colored molasse section. Brown, brownish-gray, gypsiferous siltstone (aleurolites) with subordinate brownish-gray sandstones, gravelites, and conglomerates. Thickness up to 485 m.

Lithology Pattern:

Siltstone

Relationships and Distribution

Lower contact

Overlies with erosion on pale pink nodular limestones and marls (carbonate weathering crusts) of the Irtash Fm or red-colored Oligocene-Miocene Chulin Fm.

Upper contact

Conformably overlain by the Toytyubin Fm

Regional extent

In the Prishashkent depression (the specific square is not specified). B.I. Pinhasov (144; 145) correlates it with the lower part of the section of the upper Pliocene-Eopleistocene brown-colored molasse formation of the Upper TienShan Gr. It is correlated with the Chatkal Fm, Bogustan Fm, and Beldersay Fm, S+D (late-middle Pliocene) of V.A. Zakharovich (1978), and the Gidzhal Fm of L.D. Anpleyeva (Koloyarov et al., 1977).

GeoJSON

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Fossils

Contains ostracods - Ilyocypris bradyi Sars., Cyprinotus sp., Eucypris sp., Zonocypris membranae (Liv.), Candoniella albicans (Brady), C. schubinae Mand., Potamocypris longisetosa Bron., Cyprinotus vialovi Schn. of the late Pliocene.

Age

According to A.A., the age of the suite is late Pliocene.

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:

0.5

Ending date (Ma):

3.09

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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