Kassantau Formation

Kassantau Fm

Period:

Neogene

Age Interval:

Upper Pliocene (Akchagyl regional stage), K1-K9

Province:
Kyzylkum Region

Type Locality and Naming

Along the Kassantau uplift, Karshin Steppe. V.G. Danilov et al., 1966; G.Yu. Alferov, 1969 (58, pp.173-175).

Synonym: Kassantau Suite, Кассантаская св.

Lithology and Thickness

Brownish alluvial-proluvial, rarely lacustrine, aleurolitic clays and siltstone (aleurolites), subordinate sandstones, lenses of coarse-clastic rocks. Thickness 100-600m.

Lithology Pattern:

Aus Conglomerate

Relationships and Distribution

Lower contact

Unconformably overlies Miocene and Paleogene

Upper contact

Overlain with erosion by the Saitian Fm (Sayat Fm?), or Guzar Fm.

Regional extent

Karshin Steppe. According to B.I. Pinhasov, in the western part of the Karshin Steppe, the Kassantau Fm is facially replaced by the Dengizkul-Neog Fm and is its age equivalent - Lower-Middle Akchagyl.

GeoJSON

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Fossils

Contains imprints of mollusks Planorbis sp., Avimactra sp, ostracods - Cyprideis littoralis (Br.), C. torosa (Lones), Darwinula stevensoni (Br. et Robert), Limnocythere alveolata Suzin., L. quadrata Mand., Eucypris concinna Schn.

Age

A.A. attributed the Kassantau Fm to the Lower Akchagyl.

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:

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)”