Ergashkuduk Formation

Ergashkuduk Fm

Period:

Neogene

Age Interval:

Upper Pliocene-Eopleistocene, K10

Province:
Kyzylkum Region

Type Locality and Naming

Along the Ergashkuduk depression, Eastern Kyzylkumy. B.I. Pinhasov, 1978 (144, p. 36). Stratotype section of well 3 in the eastern part of the Ergashkuduk depression (145). Initially attributed to the Apscheron.

Synonym: Ergashkuduk Suite, Ергашкудукская св.

Lithology and Thickness

Alluvial gray polymictic sands of paleo-Syrdarya, subordinate clays and siltstone (aleurolites). Thickness up to 150-180 m.

Lithology Pattern:

Coarse-grained sandstone

Relationships and Distribution

Lower contact

Interbedded with the Dengizkul Fm

Upper contact

Overlain by aeolian sands.

Regional extent

Eastern Kyzylkumy, Syrdarya depression, Nurata district. corresponding to the upper part of the Arnasay Fm of the Hungry Steppe.

GeoJSON

null

Fossils

Contains ostracods - Ilyocypris bradyi Sars., I. Gibba (Ramdohr.), Cyclocyprus laevis (O. Müller), Candona aff. neglecta Sars., Cypris phisematosa Kondrasch., Condoniella albicans Br.

Age

In 1985, B.I. Pinhasov (145) refined the age, and the suite was assigned to the upper Akchagyl-Apscheron (upper Pliocene-Eopleistocene)

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