Neogene

Paleogene

Cretaceous

Jurassic

Triassic

Permian

Carboniferous

Devonian

Silurian

Ordovician

Cambrian

Neoproterozoic

Mesoproterozoic

Paleoproterozoic

Main source = Abduazimova, Z.M. (Ed.), 2001. Stratigraphic Dictionary of Uzbekistan. IMR (Institute of Mineral Resources), Tashkent, 580 pp. (In Russian) Translated to English by the GeoGPT group, Zhejiang Lab, Hangzhou, China--see About

Akoy Formation

Akoy Fm

Period:

Carboniferous

Age Interval:

Upper Bashkirian, K3

Province:
Kyzylkum Region

Type Locality and Naming

Named after the village of Akoi, Okzhetpes Mountains, Central Kyzylkum. S.Ya. Lapidus in 1992 (460, p. 183).

Synonym:

Lithology and Thickness

At the base, conglomerates, followed by thin-bedded limestones with lenses and concretions of cherts. Thickness 200m. Ya.B. Aysanov et al. (1984) note bauxites at the base of the section.

Lithology Pattern:

Siliceous limestone

Relationships and Distribution

Lower contact

Overlies the Dzhuskuduk Fm (Juskydak Suite) limestones, with a slight erosion

Upper contact

It is overlain by the Auliekuduk Fm.

Regional extent

Central Kyzylkum, South Bukantau, Okzhetpes Mountains.

GeoJSON

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Fossils

In the limestones, foraminifers - Verella of the upper Bashkirian substage.

Age

Age Span:

Beginning stage:

Bashkirian

Fraction up in beginning stage:

0.0

Beginning date (Ma):

323.40

Ending stage:

Bashkirian

Fraction up in the ending stage:

1.0

Ending date (Ma):

315.15

Depositional setting

Depositional pattern:

Additional Information

Compiler:

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